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371 results on '"Mullaney, J. R."'

102. Identifying the subtle signatures of feedback from distant AGN using ALMA observations and the EAGLE hydrodynamical simulations.

Author

Scholtz, J., Alexander, D. M., Harrison, C. M., Rosario, D. J., McAlpine, S., Mullaney, J. R., Stanley, F., Simpson, J., Theuns, T., Bower, R. G., Hickox, R. C., Santini, P., and Swinbank, A. M.

Subjects
ACTIVE galactic nuclei, HYDRODYNAMICS, LUMINOSITY, STELLAR mass, X-ray astronomy, ASTRONOMICAL observations
Abstract

We present sensitive 870 μm continuum measurements from our ALMA programmes of 114 X-ray selected active galactic nuclei (AGN) in the Chandra Deep Field-South and Cosmic Evolution Survey fields. We use these observations in combination with data from Spitzer and Herschel to construct a sample of 86 X-ray selected AGN, 63 with ALMA constraints at z = 1.5-3.2 with stellar mass >2 × 1010 M☉. We constructed broad-band spectral energy distributions in the infrared band (8-1000 μm) and constrain star-formation rates (SFRs) uncontaminated by the AGN. Using a hierarchical Bayesian method that takes into account the information from upper limits, we fit SFR and specific SFR (sSFR) distributions. We explore these distributions as a function of both X-ray luminosity and stellar mass. We compare our measurements to two versions of the Evolution and Assembly of GaLaxies and their Environments (EAGLE) hydrodynamical simulations: the reference model withAGNfeedback and the model without AGN. We find good agreement between the observations and that predicted by the EAGLE reference model for the modes and widths of the sSFR distributions as a function of both X-ray luminosity and stellar mass; however, we found that the EAGLE model without AGN feedback predicts a significantly narrower width when compared to the data. Overall, from the combination of the observations with the model predictions, we conclude that (1) even with AGN feedback, we expect no strong relationship between the sSFR distribution parameters and instantaneous AGN luminosity and (2) a signature of AGN feedback is a broad distribution of sSFRs for all galaxies (not just those hosting an AGN) with stellar masses above ≈1010M☉. [ABSTRACT FROM AUTHOR]

Published
2018
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103. GOODS-Herschel : the far-infrared view of star formation in active galactic nucleus host galaxies since z ≈ 3

Author

Mullaney, J. R., Pannella, M., Daddi, E., Alexander, D. M., Elbaz, D., Hickox, R. C., Bournaud, F., Altieri, B., Aussel, H., Coia, D., Dannerbauer, H., Dasyra, K., Dickinson, M., Hwang, H. S., Kartaltepe, J., Leiton, R., Magdis, G., Magnelli, B., Popesso, P., Valtchanov, I., Bauer, F. E., Brandt, W. N., Del Moro, A., Hanish, D. J., Ivison, R. J., Juneau, S., Luo, B., Lutz, D., Sargent, M. T., Scott, D., and Xue, Y. Q.

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

We present a study of the infrared properties of X-ray selected, moderate-luminosity (i.e. LX= 1042–1044 erg s−1) active galactic nuclei (AGNs) up to z ≈ 3, in order to explore the links between star formation in galaxies and accretion on to their central black holes. We use 100 and 160 μ m fluxes from GOODS-Herschel – the deepest survey yet undertaken by the Herschel telescope – and show that in the vast majority of cases (i.e. >94 per cent) these fluxes are dominated by emission from the host galaxy. As such, these far-infrared bands provide an uncontaminated view of star formation in the AGN host galaxies. We find no evidence of any correlation between the X-ray and infrared luminosities of moderate AGNs at any redshift, suggesting that global star formation is decoupled from nuclear (i.e. AGN) activity in these galaxies. On the other hand, we confirm that the star formation rates of AGN hosts increase strongly with redshift, by a factor of 43+27− 18 from z < 0.1 to z = 2–3 for AGNs with the same range of X-ray luminosities. This increase is entirely consistent with the factor of 25–50 increase in the specific star formation rates (SSFRs) of normal, star-forming (i.e. main-sequence) galaxies over the same redshift range. Indeed, the average SSFRs of AGN hosts are only marginally (i.e. ≈20 per cent) lower than those of main-sequence galaxies at all surveyed redshifts, with this small deficit being due to a fraction of AGNs residing in quiescent (i.e. low SSFR) galaxies. We estimate that 79 ± 10 per cent of moderate-luminosity AGNs are hosted in main-sequence galaxies, 15 ± 7 per cent in quiescent galaxies and

Published
2012

105. Mid-infrared luminous quasars in the GOODS–Herschelfields: a large population of heavily obscured, Compton-thick quasars atz≈ 2

Author

Del Moro, A., primary, Alexander, D. M., additional, Bauer, F. E., additional, Daddi, E., additional, Kocevski, D. D., additional, McIntosh, D. H., additional, Stanley, F., additional, Brandt, W. N., additional, Elbaz, D., additional, Harrison, C. M., additional, Luo, B., additional, Mullaney, J. R., additional, and Xue, Y. Q., additional

Published
2015
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107. THENuSTAREXTRAGALACTIC SURVEY: FIRST DIRECT MEASUREMENTS OF THE ≳10 keV X-RAY LUMINOSITY FUNCTION FOR ACTIVE GALACTIC NUCLEI ATz> 0.1

Author

Aird, J., primary, Alexander, D. M., additional, Ballantyne, D. R., additional, Civano, F., additional, Del-Moro, A., additional, Hickox, R. C., additional, Lansbury, G. B., additional, Mullaney, J. R., additional, Bauer, F. E., additional, Brandt, W. N., additional, Comastri, A., additional, Fabian, A. C., additional, Gandhi, P., additional, Harrison, F. A., additional, Luo, B., additional, Stern, D., additional, Treister, E., additional, Zappacosta, L., additional, Ajello, M., additional, Assef, R., additional, Baloković, M., additional, Boggs, S. E., additional, Brightman, M., additional, Christensen, F. E., additional, Craig, W. W., additional, Elvis, M., additional, Forster, K., additional, Grefenstette, B. W., additional, Hailey, C. J., additional, Koss, M., additional, LaMassa, S. M., additional, Madsen, K. K., additional, Puccetti, S., additional, Saez, C., additional, Urry, C. M., additional, Wik, D. R., additional, and Zhang, W., additional

Published
2015
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108. ALMA andHerschelreveal that X-ray-selected AGN and main-sequence galaxies have different star formation rate distributions

Author

Mullaney, J. R., primary, Alexander, D. M., additional, Aird, J., additional, Bernhard, E., additional, Daddi, E., additional, Del Moro, A., additional, Dickinson, M., additional, Elbaz, D., additional, Harrison, C. M., additional, Juneau, S., additional, Liu, D., additional, Pannella, M., additional, Rosario, D., additional, Santini, P., additional, Sargent, M., additional, Schreiber, C., additional, Simpson, J., additional, and Stanley, F., additional

Published
2015
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110. THENuSTAREXTRAGALACTIC SURVEYS: INITIAL RESULTS AND CATALOG FROM THE EXTENDEDCHANDRADEEP FIELD SOUTH

Author

Mullaney, J. R., primary, Del-Moro, A., additional, Aird, J., additional, Alexander, D. M., additional, Civano, F. M., additional, Hickox, R. C., additional, Lansbury, G. B., additional, Ajello, M., additional, Assef, R., additional, Ballantyne, D. R., additional, Balokovic´, M., additional, Bauer, F. E., additional, Brandt, W. N., additional, Boggs, S. E., additional, Brightman, M., additional, Christensen, F. E., additional, Comastri, A., additional, Craig, W. W., additional, Elvis, M., additional, Forster, K., additional, Gandhi, P., additional, Grefenstette, B. W., additional, Hailey, C. J., additional, Harrison, F. A., additional, Koss, M., additional, LaMassa, S. M., additional, Luo, B., additional, Madsen, K. K., additional, Puccetti, S., additional, Saez, C., additional, Stern, D., additional, Treister, E., additional, Urry, C. M., additional, Wik, D. R., additional, Zappacosta, L., additional, and Zhang, W., additional

Published
2015
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111. THENuSTAREXTRAGALACTIC SURVEYS: OVERVIEW AND CATALOG FROM THE COSMOS FIELD

Author

Civano, F., primary, Hickox, R. C., additional, Puccetti, S., additional, Comastri, A., additional, Mullaney, J. R., additional, Zappacosta, L., additional, LaMassa, S. M., additional, Aird, J., additional, Alexander, D. M., additional, Ballantyne, D. R., additional, Bauer, F. E., additional, Brandt, W. N., additional, Boggs, S. E., additional, Christensen, F. E., additional, Craig, W. W., additional, Del-Moro, A., additional, Elvis, M., additional, Forster, K., additional, Gandhi, P., additional, Grefenstette, B. W., additional, Hailey, C. J., additional, Harrison, F. A., additional, Lansbury, G. B., additional, Luo, B., additional, Madsen, K., additional, Saez, C., additional, Stern, D., additional, Treister, E., additional, Urry, M. C., additional, Wik, D. R., additional, and Zhang, W., additional

Published
2015
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112. The composite nature of Dust-Obscured Galaxies (DOGs) atz ∼ 2–3 in the COSMOS field – I. A far-infrared view

Author

Riguccini, L., primary, Le Floc'h, E., additional, Mullaney, J. R., additional, Menéndez-Delmestre, K., additional, Aussel, H., additional, Berta, S., additional, Calanog, J., additional, Capak, P., additional, Cooray, A., additional, Ilbert, O., additional, Kartaltepe, J., additional, Koekemoer, A., additional, Lutz, D., additional, Magnelli, B., additional, McCracken, H., additional, Oliver, S., additional, Roseboom, I., additional, Salvato, M., additional, Sanders, D., additional, Scoville, N., additional, Taniguchi, Y., additional, and Treister, E., additional

Published
2015
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113. RELATIONSHIP BETWEEN STAR FORMATION RATE AND BLACK HOLE ACCRETION AT z = 2: THE DIFFERENT CONTRIBUTIONS IN QUIESCENT, NORMAL, AND STARBURST GALAXIES

Author

Rodighiero, G., primary, Brusa, M., additional, Daddi, E., additional, Negrello, M., additional, Mullaney, J. R., additional, Delvecchio, I., additional, Lutz, D., additional, Renzini, A., additional, Franceschini, A., additional, Baronchelli, I., additional, Pozzi, F., additional, Gruppioni, C., additional, Strazzullo, V., additional, Cimatti, A., additional, and Silverman, J., additional

Published
2015
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115. NuSTAR J033202-2746.8: direct constraints on the Compton reflection in a heavily obscured quasar at z ≈ 2

Author

Del Moro, A., Mullaney, J. R., Alexander, D. M., Comastri, A., Bauer, F. E., Treister, E., Stern, D., Civano, F., Ranalli, P., Vignali, C., Aird, J. A., Ballantyne, D. R., Baloković, M., Boggs, S. E., Brandt, W. N., Christensen, Finn Erland, Craig, W. W., Gandhi, P., Gilli, R., Hailey, C. J., Harrison, F. A., Hickox, R. C., LaMassa, S. M., Lansbury, G. B., Luo, B., Puccetti, S., Urry, M., Zhang, W. W., Del Moro, A., Mullaney, J. R., Alexander, D. M., Comastri, A., Bauer, F. E., Treister, E., Stern, D., Civano, F., Ranalli, P., Vignali, C., Aird, J. A., Ballantyne, D. R., Baloković, M., Boggs, S. E., Brandt, W. N., Christensen, Finn Erland, Craig, W. W., Gandhi, P., Gilli, R., Hailey, C. J., Harrison, F. A., Hickox, R. C., LaMassa, S. M., Lansbury, G. B., Luo, B., Puccetti, S., Urry, M., and Zhang, W. W.

Abstract

We report Nuclear Spectroscopic Telescope Array (NuSTAR) observations of NuSTAR J033202-2746.8, a heavily obscured, radio-loud quasar detected in the Extended Chandra Deep Field-South, the deepest layer of the NuSTAR extragalactic survey (∼400 ks, at its deepest). NuSTAR J033202-2746.8 is reliably detected by NuSTAR only at E > 8 keV and has a very flat spectral slope in the NuSTAR energy band (Γ = 0.55−0.64+0.62; 3-30 keV). Combining the NuSTAR data with extremely deep observations by Chandra and XMM-Newton (4 Ms and 3 Ms, respectively), we constrain the broad-band X-ray spectrum of NuSTAR J033202-2746.8, indicating that this source is a heavily obscured quasar (NH = 5.6+−0.80.9 × 1023 cm−2) with luminosity L10-40 keV ≈ 6.4 × 1044 erg s−1. Although existing optical and near-infrared (near-IR) data, as well as follow-up spectroscopy with the Keck and VLT telescopes, failed to provide a secure redshift identification for NuSTAR J033202-2746.8, we reliably constrain the redshift z = 2.00 ± 0.04 from the X-ray spectral features (primarily from the iron K edge). The NuSTAR spectrum shows a significant reflection component (R = 0.55+−0.370.44), which was not constrained by previous analyses of Chandra and XMM-Newton data alone. The measured reflection fraction is higher than the R∼0 typically observed in bright radio-loud quasars such as NuSTAR J033202-2746.8, which has L1.4 GHz≈1027 W Hz−1. Constraining the spectral shape of active galactic nuclei (AGNs), including bright quasars, is very important for understanding the AGN population, and can have a strong impact on the modeling of the X-ray background. Our results show the importance of NuSTAR in investigating the broad-band spectral properties of quasars out to high redshift.

Published
2014

116. The NuSTAR Extragalactic Surveys: Initial Results and Catalog from the Extended Chandra Deep Field South

Author

Mullaney J. R., Del Moro A., Aird J., Alexander D. M., Civano F. M., Hickox R. C., Lansbury G. B., Ajello M., Assef R., Ballantyne D. R., Balokovic M., Bauer F. E., Brandt W. N., Boggs S. E., Brightman M., Christensen F. E., Comastri A., Craig W. W., Elvis M., Forster K., Gandhi P., Grefenstette B. W., Hailey C. J., Harrison F. A., and Koss M.

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Cosmology and Extragalactic Astrophysics
Abstract

We present the initial results and the source catalog from the Nuclear Spectroscopic Telescope Array (NuSTAR) survey of the Extended Chandra Deep Field South (hereafter ECDFS)—currently the deepest contiguous component of the NuSTAR extragalactic survey program. The survey covers the full ˜30' × 30' area of this field to a maximum depth of ˜360 ks (\approx 220 ks when corrected for vignetting at 3–24 keV) reaching sensitivity limits of \approx 1.3\times {10}^{ 14}\;\mathrm{erg}\;{{\rm{s}}}^{ 1}\;{\mathrm{cm}}^{ 2} (3–8 keV) \approx 3.4\times {10}^{ 14}\;\mathrm{erg}\;{{\rm{s}}}^{ 1}\;{\mathrm{cm}}^{ 2} (8–24 keV) and \approx 3.0\times {10}^{ 14}\;\mathrm{erg}\;{{\rm{s}}}^{ 1}\;{\mathrm{cm}}^{ 2} (3–24 keV). A total of 54 sources are detected over the full field although five of these are found to lie below our significance threshold once contaminating flux from neighboring (i.e. blended) sources is taken into account. Of the remaining 49 that are significant 19 are detected in the 8–24 keV band. The 8–24 to 3–8 keV band ratios of the 12 sources that are detected in both bands span the range 0.39–1.7 corresponding to a photon index range of {\rm{\Gamma }}\approx 0.5 2.3 with a median photon index of \bar{{\rm{\Gamma }}}=1.70\pm 0.52. The redshifts of the 49 sources in our main sample span the range z=0.21 2.7 and their rest frame 10–40 keV luminosities (derived from the observed 8–24 keV fluxes) span the range {L}_{10 40\;\mathrm{keV}}\approx (0.7 300)\times {10}^{43}\;\mathrm{erg}\;{{\rm{s}}}^{ 1} sampling below the "knee" of the X ray luminosity function out to z\sim 0.8 1. Finally we identify one NuSTAR source that has neither a Chandra nor an XMM Newton counterpart but that shows evidence of nuclear activity at infrared wavelengths and thus may represent a genuine new X ray source detected by NuSTAR in the ECDFS.

Published
2015

117. The host galaxies of X-ray selected active galactic nuclei toz= 2.5: Structure, star formation, and their relationships from CANDELS andHerschel/PACS

Author

Rosario, D. J., primary, McIntosh, D. H., additional, van der Wel, A., additional, Kartaltepe, J., additional, Lang, P., additional, Santini, P., additional, Wuyts, S., additional, Lutz, D., additional, Rafelski, M., additional, Villforth, C., additional, Alexander, D. M., additional, Bauer, F. E., additional, Bell, E. F., additional, Berta, S., additional, Brandt, W. N., additional, Conselice, C. J., additional, Dekel, A., additional, Faber, S. M., additional, Ferguson, H. C., additional, Genzel, R., additional, Grogin, N. A., additional, Kocevski, D. D., additional, Koekemoer, A. M., additional, Koo, D. C., additional, Lotz, J. M., additional, Magnelli, B., additional, Maiolino, R., additional, Mozena, M., additional, Mullaney, J. R., additional, Papovich, C. J., additional, Popesso, P., additional, Tacconi, L. J., additional, Trump, J. R., additional, Avadhuta, S., additional, Bassett, R., additional, Bell, A., additional, Bernyk, M., additional, Bournaud, F., additional, Cassata, P., additional, Cheung, E., additional, Croton, D., additional, Donley, J., additional, DeGroot, L., additional, Guedes, J., additional, Hathi, N., additional, Herrington, J., additional, Hilton, M., additional, Lai, K., additional, Lani, C., additional, Martig, M., additional, McGrath, E., additional, Mutch, S., additional, Mortlock, A., additional, McPartland, C., additional, O’Leary, E., additional, Peth, M., additional, Pillepich, A., additional, Poole, G., additional, Snyder, D., additional, Straughn, A., additional, Telford, O., additional, Tonini, C., additional, and Wandro, P., additional

Published
2014
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119. Rapidly growing black holes and host galaxies in the distant Universe from theHerschelRadio Galaxy Evolution Project

Author

Drouart, G., primary, De Breuck, C., additional, Vernet, J., additional, Seymour, N., additional, Lehnert, M., additional, Barthel, P., additional, Bauer, F. E., additional, Ibar, E., additional, Galametz, A., additional, Haas, M., additional, Hatch, N., additional, Mullaney, J. R., additional, Nesvadba, N., additional, Rocca-Volmerange, B., additional, Röttgering, H. J. A., additional, Stern, D., additional, and Wylezalek, D., additional

Published
2014
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121. NuSTAR J033202–2746.8: DIRECT CONSTRAINTS ON THE COMPTON REFLECTION IN A HEAVILY OBSCURED QUASAR AT z ≈ 2

Author

Del Moro, A., primary, Mullaney, J. R., additional, Alexander, D. M., additional, Comastri, A., additional, Bauer, F. E., additional, Treister, E., additional, Stern, D., additional, Civano, F., additional, Ranalli, P., additional, Vignali, C., additional, Aird, J. A., additional, Ballantyne, D. R., additional, Baloković, M., additional, Boggs, S. E., additional, Brandt, W. N., additional, Christensen, F. E., additional, Craig, W. W., additional, Gandhi, P., additional, Gilli, R., additional, Hailey, C. J., additional, Harrison, F. A., additional, Hickox, R. C., additional, LaMassa, S. M., additional, Lansbury, G. B., additional, Luo, B., additional, Puccetti, S., additional, Urry, M., additional, and Zhang, W. W., additional

Published
2014
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122. NuSTAROBSERVATIONS OF HEAVILY OBSCURED QUASARS ATz∼ 0.5

Author

Lansbury, G. B., primary, Alexander, D. M., additional, Moro, A. Del, additional, Gandhi, P., additional, Assef, R. J., additional, Stern, D., additional, Aird, J., additional, Ballantyne, D. R., additional, Baloković, M., additional, Bauer, F. E., additional, Boggs, S. E., additional, Brandt, W. N., additional, Christensen, F. E., additional, Craig, W. W., additional, Elvis, M., additional, Grefenstette, B. W., additional, Hailey, C. J., additional, Harrison, F. A., additional, Hickox, R. C., additional, Koss, M., additional, LaMassa, S. M., additional, Luo, B., additional, Mullaney, J. R., additional, Teng, S. H., additional, Urry, C. M., additional, and Zhang, W. W., additional

Published
2014
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123. Polycyclic aromatic hydrocarbon emission in powerful high-redshift radio galaxies

Author

Rawlings, J. I., Seymour, N., Page, M. J., De Breuck, C., Stern, D., Symeonidis, M., Appleton, P. N., Dey, A., Dickinson, M., Huynh, M., Le Floc'h, E., Lehnert, M., Mullaney, J. R., Nesvadba, N., Ogle, P., Sajina, A., Vernet, J., Zirm, A., Rawlings, J. I., Seymour, N., Page, M. J., De Breuck, C., Stern, D., Symeonidis, M., Appleton, P. N., Dey, A., Dickinson, M., Huynh, M., Le Floc'h, E., Lehnert, M., Mullaney, J. R., Nesvadba, N., Ogle, P., Sajina, A., Vernet, J., and Zirm, A.

Published
2013

126. THENuSTAREXTRAGALACTIC SURVEY: A FIRST SENSITIVE LOOK AT THE HIGH-ENERGY COSMIC X-RAY BACKGROUND POPULATION

Author

Alexander, D. M., primary, Stern, D., additional, Del Moro, A., additional, Lansbury, G. B., additional, Assef, R. J., additional, Aird, J., additional, Ajello, M., additional, Ballantyne, D. R., additional, Bauer, F. E., additional, Boggs, S. E., additional, Brandt, W. N., additional, Christensen, F. E., additional, Civano, F., additional, Comastri, A., additional, Craig, W. W., additional, Elvis, M., additional, Grefenstette, B. W., additional, Hailey, C. J., additional, Harrison, F. A., additional, Hickox, R. C., additional, Luo, B., additional, Madsen, K. K., additional, Mullaney, J. R., additional, Perri, M., additional, Puccetti, S., additional, Saez, C., additional, Treister, E., additional, Urry, C. M., additional, Zhang, W. W., additional, Bridge, C. R., additional, Eisenhardt, P. R. M., additional, Gonzalez, A. H., additional, Miller, S. H., additional, and Tsai, C. W., additional

Published
2013
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127. NUCLEAR ACTIVITY IS MORE PREVALENT IN STAR-FORMING GALAXIES

Author

Rosario, D. J., primary, Santini, P., additional, Lutz, D., additional, Netzer, H., additional, Bauer, F. E., additional, Berta, S., additional, Magnelli, B., additional, Popesso, P., additional, Alexander, D. M., additional, Brandt, W. N., additional, Genzel, R., additional, Maiolino, R., additional, Mullaney, J. R., additional, Nordon, R., additional, Saintonge, A., additional, Tacconi, L., additional, and Wuyts, S., additional

Published
2013
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129. CONCURRENT SUPERMASSIVE BLACK HOLE AND GALAXY GROWTH: LINKING ENVIRONMENT AND NUCLEAR ACTIVITY INz= 2.23 Hα EMITTERS

Author

Lehmer, B. D., primary, Lucy, A. B., additional, Alexander, D. M., additional, Best, P. N., additional, Geach, J. E., additional, Harrison, C. M., additional, Hornschemeier, A. E., additional, Matsuda, Y., additional, Mullaney, J. R., additional, Smail, Ian, additional, Sobral, D., additional, and Swinbank, A. M., additional

Published
2013
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130. ALMA observations of a z ≈ 3.1 protocluster: star formation from active galactic nuclei and Lyman-alpha blobs in an overdense environment.

Author

Alexander, D. M., Simpson, J. M., Harrison, C. M., Mullaney, J. R., Smail, I., Geach, J. E., Hickox, R. C., Hine, N. K., Karim, A., Kubo, M., Lehmer, B. D., Matsuda, Y., Rosario, D. J., Stanley, F., Swinbank, A. M., Umehata, H., and Yamada, T.

Subjects
STELLAR evolution, GALACTIC nuclei, INTERFEROMETERS, GALAXIES, MEASURING instruments
Abstract

We exploit Atacama Large Interferometer Array (ALMA) 870 μm observations to measure the star formation rates (SFRs) of eight X-ray detected active galactic nuclei (AGNs) in a z ≈ 3.1 protocluster, four of which reside in extended Lyα haloes (often termed Lymanalpha blobs: LABs). Three of the AGNs are detected by ALMA and have implied SFRs of ≈220-410 M☉ yr-1; the non-detection of the other five AGNs places SFR upper limits of ≲210 M☉ yr-1. The mean SFR of the protocluster AGNs (≈110-210 M☉ yr-1) is consistent (within a factor of ≈0.7-2.3) with that found for co-eval AGNs in the field, implying that the galaxy growth is not significantly accelerated in these systems. However, when also considering ALMA data from the literature, we find evidence for elevated mean SFRs (up-to a factor of ≈5.9 over the field) for AGNs at the protocluster core, indicating that galaxy growth is significantly accelerated in the central regions of the protocluster. We also show that all of the four protocluster LABs are associated with an ALMA counterpart within the extent of their Lyα emission. The SFRs of the ALMA sources within the LABs (≈150-410 M☉ yr-1) are consistent with those expected for co-eval massive star-forming galaxies in the field. Furthermore, the two giant LABs (with physical extents of ☉100 kpc) do not host more luminous star formation than the smaller LABs, despite being an order of magnitude brighter in Lyα emission. We use these results to discuss star formation as the power source of LABs. [ABSTRACT FROM AUTHOR]

Published
2016
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131. Mid-infrared luminous quasars in the GOODS-Herschel fields: a large population of heavily obscured, Compton-thick quasars at z ≈ 2.

Author

Del Moro, A., Alexander, D. M., Bauer, F. E., Daddi, E., Kocevski, D. D., McIntosh, D. H., Stanley, F., Brandt, W. N., Elbaz, D., Harrison, C. M., Luo, B., Mullaney, J. R., and Xue, Y. Q.

Subjects
QUASARS, INFRARED astronomy, COMPTON effect, X-ray astronomy, STAR formation
Abstract

We present the infrared (IR) and X-ray properties of a sample of 33 mid-IR luminous quasars (νL6μm ≥ 6 × 1044 erg s-1) at redshift z ≈ 1-3, identified through detailed spectral energy distribution analyses of distant star-forming galaxies, using the deepest IR data from Spitzer and Herschel in the GOODS-Herschel fields. The aim is to constrain the fraction of obscured, and Compton-thick (CT, NH >1.5×1024 cm-2) quasars at the peak era of nuclear and star formation activities. Despite being very bright in the mid-IR band, ≈30 per cent of these quasars are not detected in the extremely deep 2 and 4 Ms Chandra X-ray data available in these fields. X-ray spectral analysis of the detected sources reveals that the majority (≈67 per cent) are obscured by column densities NH >1022 cm-2; this fraction reaches80 per cent when including the X-ray-undetected sources (9 out of 33), which are likely to be the most heavily obscured, CT quasars. We constrain the fraction of CT quasars in our sample to be ≈24-48 per cent, and their space density to be ɸ = (6.7 ± 2.2) × 10-6 Mpc-3. From the investigation of the quasar host galaxies in terms of star formation rates (SFRs) and morphological distortions, as a sign of galaxy mergers/interactions, we do not find any direct relation between SFRs and quasar luminosity or X-ray obscuration. On the other hand, there is tentative evidence that the most heavily obscured quasars have, on average, more disturbed morphologies than the unobscured moderately obscured quasar hosts, which preferentially live in undisturbed systems. However, the fraction of quasars with disturbed morphology amongst the whole sample is ≈40 per cent, suggesting that galaxy mergers are not the main fuelling mechanism of quasars at z ≈ 2. [ABSTRACT FROM AUTHOR]

Published
2016
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132. The KMOS AGN Survey at High redshift (KASHz): the prevalence and drivers of ionized outflows in the host galaxies of X-ray AGN.

Author

Harrison, C. M., Alexander, D. M., Mullaney, J. R., Stott, J. P., Swinbank, A. M., Arumugam, V., Bauer, F. E., Bower, R. G., Bunker, A. J., and Sharples, R. M.

Subjects
ASTRONOMICAL surveys, REDSHIFT, ACTIVE galactic nuclei, STAR formation, GALACTIC evolution, GALACTIC dynamics
Abstract

We present the first results from the KMOS (K-band Multi-Object Spectrograph) AGN (active galactic nuclei) Survey at High redshift (KASHz), a VLT/KMOS integral-field spectroscopic (IFS) survey of z ≳ 0.6 AGN. We present galaxy-integrated spectra of 89 X-ray AGN (L2-10 keV = 1042-1045 erg s-1), for which we observed [O III] (z ≈ 1.1-1.7) or Ha emission (z ≈ 0.6-1.1). The targets have X-ray luminosities representative of the parent AGN population and we explore the emission-line luminosities as a function of X-ray luminosity. For the [O III] targets,≈50 per cent have ionized gas velocities indicative of gas that is dominated by outflows and/or highly turbulent material (i.e. overall line widths≳600 km s-1). The most luminous half (i.e. LX > 6 × 1043 erg s-1) have a ≳2 times higher incidence of such velocities. On the basis of our results, we find no evidence that X-ray obscured AGN are more likely to host extreme kinematics than unobscured AGN. Our KASHz sample has a distribution of gas velocities that is consistent with a luminosity-matched sample ofz<0.4 AGN. This implies little evolution in the prevalence of ionized outflows, for a fixed AGN luminosity, despite an order-of-magnitude decrease in average star formation rates over this redshift range. Furthermore, we compare our Ha targets to a redshift-matched sample of star-forming galaxies and despite a similar distribution of Ha luminosities and likely star formation rates, we find extreme ionized gas velocities are up to ≈10 times more prevalent in the AGN-host galaxies. Our results reveal a high prevalence of extreme ionized gas velocities in high-luminosity X-ray AGN and imply that the most powerful ionized outflows in high-redshift galaxies are driven by AGN activity. [ABSTRACT FROM AUTHOR]

Published
2016
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133. GOODS-Herschel: radio-excess signature of hidden AGN activity in distant star-forming galaxies

Author

Del Moro, A., primary, Alexander, D. M., additional, Mullaney, J. R., additional, Daddi, E., additional, Pannella, M., additional, Bauer, F. E., additional, Pope, A., additional, Dickinson, M., additional, Elbaz, D., additional, Barthel, P. D., additional, Garrett, M. A., additional, Brandt, W. N., additional, Charmandaris, V., additional, Chary, R. R., additional, Dasyra, K., additional, Gilli, R., additional, Hickox, R. C., additional, Hwang, H. S., additional, Ivison, R. J., additional, Juneau, S., additional, Le Floc’h, E., additional, Luo, B., additional, Morrison, G. E., additional, Rovilos, E., additional, Sargent, M. T., additional, and Xue, Y. Q., additional

Published
2012
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134. Polycyclic aromatic hydrocarbon emission in powerful high-redshift radio galaxies

Author

Rawlings, J. I., primary, Seymour, N., additional, Page, M. J., additional, De Breuck, C., additional, Stern, D., additional, Symeonidis, M., additional, Appleton, P. N., additional, Dey, A., additional, Dickinson, M., additional, Huynh, M., additional, Floc'h, E. Le, additional, Lehnert, M., additional, Mullaney, J. R., additional, Nesvadba, N., additional, Ogle, P., additional, Sajina, A., additional, Vernet, J., additional, and Zirm, A., additional

Published
2012
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135. NO CLEAR SUBMILLIMETER SIGNATURE OF SUPPRESSED STAR FORMATION AMONG X-RAY LUMINOUS ACTIVE GALACTIC NUCLEI

Author

Harrison, C. M., primary, Alexander, D. M., additional, Mullaney, J. R., additional, Altieri, B., additional, Coia, D., additional, Charmandaris, V., additional, Daddi, E., additional, Dannerbauer, H., additional, Dasyra, K., additional, Del Moro, A., additional, Dickinson, M., additional, Hickox, R. C., additional, Ivison, R. J., additional, Kartaltepe, J., additional, Le Floc'h, E., additional, Leiton, R., additional, Magnelli, B., additional, Popesso, P., additional, Rovilos, E., additional, Rosario, D., additional, and Swinbank, A. M., additional

Published
2012
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136. GOODS-Herschel: ultra-deepXMM-Newtonobservations reveal AGN/star-formation connection

Author

Rovilos, E., primary, Comastri, A., additional, Gilli, R., additional, Georgantopoulos, I., additional, Ranalli, P., additional, Vignali, C., additional, Lusso, E., additional, Cappelluti, N., additional, Zamorani, G., additional, Elbaz, D., additional, Dickinson, M., additional, Hwang, H. S., additional, Charmandaris, V., additional, Ivison, R. J., additional, Merloni, A., additional, Daddi, E., additional, Carrera, F. J., additional, Brandt, W. N., additional, Mullaney, J. R., additional, Scott, D., additional, Alexander, D. M., additional, Del Moro, A., additional, Morrison, G., additional, Murphy, E. J., additional, Altieri, B., additional, Aussel, H., additional, Dannerbauer, H., additional, Kartaltepe, J., additional, Leiton, R., additional, Magdis, G., additional, Magnelli, B., additional, Popesso, P., additional, and Valtchanov, I., additional

Published
2012
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137. Energetic galaxy-wide outflows in high-redshift ultraluminous infrared galaxies hosting AGN activity

Author

Harrison, C. M., primary, Alexander, D. M., additional, Swinbank, A. M., additional, Smail, Ian, additional, Alaghband-Zadeh, S., additional, Bauer, F. E., additional, Chapman, S. C., additional, Del Moro, A., additional, Hickox, R. C., additional, Ivison, R. J., additional, Menéndez-Delmestre, Karín, additional, Mullaney, J. R., additional, and Nesvadba, N. P. H., additional

Published
2012
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140. GOODS-Herschel: the far-infrared view of star formation in active galactic nucleus host galaxies since z ≈ 3

Author

Mullaney, J. R., primary, Pannella, M., additional, Daddi, E., additional, Alexander, D. M., additional, Elbaz, D., additional, Hickox, R. C., additional, Bournaud, F., additional, Altieri, B., additional, Aussel, H., additional, Coia, D., additional, Dannerbauer, H., additional, Dasyra, K., additional, Dickinson, M., additional, Hwang, H. S., additional, Kartaltepe, J., additional, Leiton, R., additional, Magdis, G., additional, Magnelli, B., additional, Popesso, P., additional, Valtchanov, I., additional, Bauer, F. E., additional, Brandt, W. N., additional, Del Moro, A., additional, Hanish, D. J., additional, Ivison, R. J., additional, Juneau, S., additional, Luo, B., additional, Lutz, D., additional, Sargent, M. T., additional, Scott, D., additional, and Xue, Y. Q., additional

Published
2011
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141. GOODS–Herschel: an infrared main sequence for star-forming galaxies

Author

Elbaz, D., primary, Dickinson, M., additional, Hwang, H. S., additional, Díaz-Santos, T., additional, Magdis, G., additional, Magnelli, B., additional, Le Borgne, D., additional, Galliano, F., additional, Pannella, M., additional, Chanial, P., additional, Armus, L., additional, Charmandaris, V., additional, Daddi, E., additional, Aussel, H., additional, Popesso, P., additional, Kartaltepe, J., additional, Altieri, B., additional, Valtchanov, I., additional, Coia, D., additional, Dannerbauer, H., additional, Dasyra, K., additional, Leiton, R., additional, Mazzarella, J., additional, Alexander, D. M., additional, Buat, V., additional, Burgarella, D., additional, Chary, R.-R., additional, Gilli, R., additional, Ivison, R. J., additional, Juneau, S., additional, Le Floc’h, E., additional, Lutz, D., additional, Morrison, G. E., additional, Mullaney, J. R., additional, Murphy, E., additional, Pope, A., additional, Scott, D., additional, Brodwin, M., additional, Calzetti, D., additional, Cesarsky, C., additional, Charlot, S., additional, Dole, H., additional, Eisenhardt, P., additional, Ferguson, H. C., additional, Förster Schreiber, N., additional, Frayer, D., additional, Giavalisco, M., additional, Huynh, M., additional, Koekemoer, A. M., additional, Papovich, C., additional, Reddy, N., additional, Surace, C., additional, Teplitz, H., additional, Yun, M. S., additional, and Wilson, G., additional

Published
2011
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142. X-RAY SPECTRAL CONSTRAINTS FORz≈ 2 MASSIVE GALAXIES: THE IDENTIFICATION OF REFLECTION-DOMINATED ACTIVE GALACTIC NUCLEI

Author

Alexander, D. M., primary, Bauer, F. E., additional, Brandt, W. N., additional, Daddi, E., additional, Hickox, R. C., additional, Lehmer, B. D., additional, Luo, B., additional, Xue, Y. Q., additional, Young, M., additional, Comastri, A., additional, Del Moro, A., additional, Fabian, A. C., additional, Gilli, R., additional, Goulding, A. D., additional, Mainieri, V., additional, Mullaney, J. R., additional, Paolillo, M., additional, Rafferty, D. A., additional, Schneider, D. P., additional, Shemmer, O., additional, and Vignali, C., additional

Published
2011
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