Search

Your search keyword '"Santos T"' showing total 30 results
Start Over Author "Santos T" Journal monthly notices of the royal astronomical society
30 results on '"Santos T"'

2. extended [C ii] halo around a massive star-forming galaxy at z = 5.3.

Author

Lambert, Trystan S, Posses, A, Aravena, M, Gónzalez-López, J, Assef, R J, Díaz-Santos, T, Brisbin, D, Decarli, R, Herrera-Camus, R, Mejía, J, and Ricci, C

Subjects
GALACTIC evolution, GALAXIES, SPACE telescopes, GALACTIC halos, GALACTIC dynamics, GALACTIC redshift
Abstract

High-redshift observations are often biased towards massive and bright galaxies that are not necessarily representative of the full population. In order to accurately study galaxy evolution and mass assembly at these redshifts, observations of 'normal' main sequence galaxies are required. Here we present Atacama Large Millimeter/Submillimeter Array (ALMA) 0.3 arcsec resolution observations of the [C  ii ] emission line at 158 μm of HZ7, a main sequence galaxy at z  = 5.25. Comparing to archival rest-frame UV observations taken by the Hubble Space Telescope (HST), we find strong evidence of the existence of extended [C  ii ] emission, which we estimate to be twice the size of the rest-frame UV emission, yielding one of the first high-redshift objects where a clear signature of a [C  ii ] 'Halo' has been detected to date. For a matched Sérsic profile with n  = 1, we measured a [C  ii ] effective radius of 0.50 ± 0.04 arcsec (3.07 ± 0.25 kpc) and an average rest-frame UV effective radius of 0.2 ± 0.04 arcsec (1.48 ± 0.16 kpc). The [C  ii ] morphology and kinematics of the system suggest a merging event resulting in a non-rotating disc system. This event could be responsible for the extended [CII] emission. Alternatively, some potential obscured emission could also explain the [C  ii ] to UV size ratio. These results contribute to the growing consensus with respect to the existence of extended [C  ii ] emission around galaxies. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

3. A hard X-ray view of luminous and ultra-luminous infrared galaxies in GOALS – I. AGN obscuration along the merger sequence

Author

Ricci, C, primary, Privon, G C, additional, Pfeifle, R W, additional, Armus, L, additional, Iwasawa, K, additional, Torres-Albà, N, additional, Satyapal, S, additional, Bauer, F E, additional, Treister, E, additional, Ho, L C, additional, Aalto, S, additional, Arévalo, P, additional, Barcos-Muñoz, L, additional, Charmandaris, V, additional, Diaz-Santos, T, additional, Evans, A S, additional, Gao, T, additional, Inami, H, additional, Koss, M J, additional, Lansbury, G, additional, Linden, S T, additional, Medling, A, additional, Sanders, D B, additional, Song, Y, additional, Stern, D, additional, U, V, additional, Ueda, Y, additional, and Yamada, S, additional

Published
2021
Full Text
View/download PDF

7. The environments of luminous radio-WISE selected infrared galaxies

Author

Penney, J I, primary, Blain, A W, additional, Wylezalek, D, additional, Hatch, N A, additional, Lonsdale, C, additional, Kimball, A, additional, Assef, R J, additional, Condon, J J, additional, Eisenhardt, P R M, additional, Jones, S F, additional, Kim, M, additional, Lacy, M, additional, Muldrew, S I, additional, Petty, S, additional, Sajina, A, additional, Silva, A, additional, Stern, D, additional, Diaz-Santos, T, additional, Tsai, C-W, additional, and Wu, J, additional

Published
2018
Full Text
View/download PDF

9. The [C ii] emission as a molecular gas mass tracer in galaxies at low and high redshifts

Author

Zanella, A, primary, Daddi, E, additional, Magdis, G, additional, Diaz Santos, T, additional, Cormier, D, additional, Liu, D, additional, Cibinel, A, additional, Gobat, R, additional, Dickinson, M, additional, Sargent, M, additional, Popping, G, additional, Madden, S C, additional, Bethermin, M, additional, Hughes, T M, additional, Valentino, F, additional, Rujopakarn, W, additional, Pannella, M, additional, Bournaud, F, additional, Walter, F, additional, Wang, T, additional, Elbaz, D, additional, and Coogan, R T, additional

Published
2018
Full Text
View/download PDF

10. The origin of the mid-infrared nuclear polarization of active galactic nuclei

Author

Lopez-Rodriguez, E, primary, Alonso-Herrero, A, additional, Diaz-Santos, T, additional, Gonzalez-Martin, O, additional, Ichikawa, K, additional, Levenson, N A, additional, Martinez-Paredes, M, additional, Nikutta, R, additional, Packham, C, additional, Perlman, E, additional, Ramos Almeida, C, additional, Rodriguez-Espinosa, J M, additional, and Telesco, C M, additional

Published
2018
Full Text
View/download PDF

11. The dusty tori of nearby QSOs as constrained by high-resolution mid-IR observations

Author

Martínez-Paredes, M., primary, Aretxaga, I., additional, Alonso-Herrero, A., additional, González-Martín, O., additional, Lopéz-Rodríguez, E., additional, Ramos Almeida, C., additional, Asensio Ramos, A., additional, Diaz Santos, T., additional, Elitzur, M., additional, Esquej, P., additional, Hernán-Caballero, A., additional, Ichikawa, K., additional, Nikutta, R., additional, Packham, C., additional, Pereira-Santaella, M., additional, and Telesco, C., additional

Published
2017
Full Text
View/download PDF

12. The integrated properties of the CALIFA galaxies: model-derived galaxy parameters and quenching of star formation.

Author

Bitsakis, T, Sánchez, S F, Ciesla, L, Bonfini, P, Charmandaris, V, Cervantes Sodi, B, Maragkoudakis, A, Diaz-Santos, T, and Zezas, A

Subjects
GALAXIES, GALACTIC evolution, STAR formation, STELLAR evolution, SPECTRAL imaging
Abstract

We present a study of the integrated properties of the 835 galaxies in the Calar-Alto Legacy Integral Field spectroscopy Area survey. To derive the main physical parameters of the galaxies we have fitted their UV-to-IR spectral energy distributions (SEDs) with sets of theoretical models using cigale. We perform a comparison of the integrated galaxy parameters derived from multiband SED fitting with those obtained from modelling the Integral Field Unit spectra and show the clear advantage of using the SED-derived star formation rates (SFRs). A detailed analysis of galaxies in the SFR/Mstar plane as a function of their properties reveals that quenching of star formation is caused by a combination of gas deficiency and the inefficiency of the existing gas to form new stars. Exploring the plausible mechanisms that could produce this effect, we find a strong correlation with galaxy morphology and the build-up of central bulge. On the other hand, the presence of Active Galactic Nucleus and/or a stellar bar, as well as the local environment have only temporal effects on the current star formation, a result also consistent with their model-derived star formation histories. [ABSTRACT FROM AUTHOR]

Published
2019
Full Text
View/download PDF

13. The environments of luminous radio-WISE selected infrared galaxies.

Author

Penney, J I, Blain, A W, Wylezalek, D, Hatch, N A, Lonsdale, C, Kimball, A, Assef, R J, Condon, J J, Eisenhardt, P R M, Jones, S F, Kim, M, Lacy, M, Muldrew, S I, Petty, S, Sajina, A, Silva, A, Stern, D, Diaz-Santos, T, Tsai, C-W, and Wu, J

Subjects
GALAXIES, SPACE telescopes, TELESCOPES, GALACTIC evolution, EVOLUTIONARY theories
Abstract

We have observed the environments of a population of 33 heavily dust obscured, ultraluminous, high-redshift galaxies, selected using Wide-Field Infrared Survey Explorer (WISE) and NRAO 1.4 GHz VLA Sky Survey at |$z$| > 1.3 with the infrared array camera on the Spitzer Space Telescope over |$5.12\,\mathrm{ arcmin}\times 5.12\,\mathrm{ arcmin}$| fields. Colour selections are used to quantify any potential overdensities of companion galaxies in these fields. We find no significant excess of galaxies with the standard colour selection for IRAC colours of [3.6] − [4.5] > −0.1 consistent with galaxies at |$z$| > 1.3 across the whole fields with respect to wide-area Spitzer comparison fields, but there is a >2σ statistical excess within |$\rm 0.25\,arcmin\mathrm{ }$| of the central radio-WISE galaxy. Using a colour selection of |$\rm [3.6]-[4.5]\,\,\gt\,\, 0.4$|⁠, 0.5 magnitudes redder than the standard method of selecting galaxies at |$z$| > 1.3, we find a significant overdensity, in which |$\rm 76{{\ \rm per\ cent}}$| (⁠|$\rm 33{{\ \rm per\ cent}}$|⁠) of the 33 fields have a surface density greater than the |$\rm 3\sigma$| (⁠|$\rm 5\sigma$|⁠) level. There is a statistical excess of these redder galaxies within |$\rm 0.5\,arcmin$|⁠, rising to a central peak |$\rm {\sim}2$| –4 times the average density. This implies that these galaxies are statistically linked to the radio-WISE selected galaxy, indicating similar structures to those traced by red galaxies around radio-loud active galactic nuclei. [ABSTRACT FROM AUTHOR]

Published
2019
Full Text
View/download PDF

14. The nuclear and extended mid-infrared emission of Seyfert galaxies

Author

García-Bernete, I., primary, Ramos Almeida, C., additional, Acosta-Pulido, J. A., additional, Alonso-Herrero, A., additional, González-Martín, O., additional, Hernán-Caballero, A., additional, Pereira-Santaella, M., additional, Levenson, N. A., additional, Packham, C., additional, Perlman, E. S., additional, Ichikawa, K., additional, Esquej, P., additional, and Díaz-Santos, T., additional

Published
2016
Full Text
View/download PDF

15. The complex evolutionary paths of local infrared bright galaxies: a high-angular resolution mid-infrared view

Author

Alonso-Herrero, A., primary, Poulton, R., additional, Roche, P. F., additional, Hernán-Caballero, A., additional, Aretxaga, I., additional, Martínez-Paredes, M., additional, Ramos Almeida, C., additional, Pereira-Santaella, M., additional, Díaz-Santos, T., additional, Levenson, N. A., additional, Packham, C., additional, Colina, L., additional, Esquej, P., additional, González-Martín, O., additional, Ichikawa, K., additional, Imanishi, M., additional, Rodríguez Espinosa, J. M., additional, and Telesco, C., additional

Published
2016
Full Text
View/download PDF

16. Investigating the dusty torus of Seyfert galaxies using SOFIA/FORCAST photometry

Author

Fuller, L., primary, Lopez-Rodriguez, E., additional, Packham, C., additional, Ramos-Almeida, C., additional, Alonso-Herrero, A., additional, Levenson, N. A., additional, Radomski, J., additional, Ichikawa, K., additional, García-Bernete, I., additional, González-Martín, O., additional, Díaz-Santos, T., additional, and Martínez-Paredes, M., additional

Published
2016
Full Text
View/download PDF

17. Studying the evolution of galaxies in compact groups over the past 3 Gyr – II. The importance of environment in the suppression of star formation

Author

Bitsakis, T., primary, Dultzin, D., additional, Ciesla, L., additional, Díaz-Santos, T., additional, Appleton, P. N., additional, Charmandaris, V., additional, Krongold, Y., additional, Guillard, P., additional, Alatalo, K., additional, Zezas, A., additional, González, J., additional, and Lanz, L., additional

Published
2016
Full Text
View/download PDF

18. The nuclear and integrated far-infrared emission of nearby Seyfert galaxies

Author

García-González, J., primary, Alonso-Herrero, A., additional, Hernán-Caballero, A., additional, Pereira-Santaella, M., additional, Ramos-Almeida, C., additional, Acosta-Pulido, J. A., additional, Díaz-Santos, T., additional, Esquej, P., additional, González-Martín, O., additional, Ichikawa, K., additional, López-Rodríguez, E., additional, Povic, M., additional, Roche, P. F., additional, and Sánchez-Portal, M., additional

Published
2016
Full Text
View/download PDF

19. Mid-infrared imaging- and spectro-polarimetric subarcsecond observations of NGC 1068

Author

Lopez-Rodriguez, E., primary, Packham, C., additional, Roche, P. F., additional, Alonso-Herrero, A., additional, Díaz-Santos, T., additional, Nikutta, R., additional, González-Martín, O., additional, Álvarez, C. A., additional, Esquej, P., additional, Espinosa, J. M. Rodríguez, additional, Perlman, E., additional, Ramos Almeida, C., additional, and Telesco, C. M., additional

Published
2016
Full Text
View/download PDF

20. A mid-infrared spectroscopic atlas of local active galactic nuclei on sub-arcsecond resolution using GTC/CanariCam

Author

Alonso-Herrero, A., primary, Esquej, P., additional, Roche, P. F., additional, Ramos Almeida, C., additional, González-Martín, O., additional, Packham, C., additional, Levenson, N. A., additional, Mason, R. E., additional, Hernán-Caballero, A., additional, Pereira-Santaella, M., additional, Alvarez, C., additional, Aretxaga, I., additional, López-Rodríguez, E., additional, Colina, L., additional, Díaz-Santos, T., additional, Imanishi, M., additional, Rodríguez Espinosa, J. M., additional, and Perlman, E., additional

Published
2015
Full Text
View/download PDF

21. A deep look at the nuclear region of UGC 5101 through high angular resolution mid-IR data with GTC/CanariCam

Author

Martínez-Paredes, M., primary, Alonso-Herrero, A., additional, Aretxaga, I., additional, Ramos Almeida, C., additional, Hernán-Caballero, A., additional, González-Martín, O., additional, Pereira-Santaella, M., additional, Packham, C., additional, Asensio Ramos, A., additional, Díaz-Santos, T., additional, Elitzur, M., additional, Esquej, P., additional, García-Bernete, I., additional, Imanishi, M., additional, Levenson, N. A., additional, and Rodríguez Espinosa, J. M., additional

Published
2015
Full Text
View/download PDF

22. Sub-arcsec mid-IR observations of NGC 1614: Nuclear star formation or an intrinsically X-ray weak AGN?

Author

Pereira-Santaella, M., primary, Colina, L., additional, Alonso-Herrero, A., additional, Usero, A., additional, Díaz-Santos, T., additional, García-Burillo, S., additional, Alberdi, A., additional, Gonzalez-Martin, O., additional, Herrero-Illana, R., additional, Imanishi, M., additional, Levenson, N. A., additional, Pérez-Torres, M. A., additional, and Ramos Almeida, C., additional

Published
2015
Full Text
View/download PDF

23. Early Science with the Large Millimeter Telescope: CO and [C ii] Emission in thez = 4.3 AzTEC J095942.9+022938 (COSMOS AzTEC-1)

Author

Yun, Min S., primary, Aretxaga, I., additional, Gurwell, M. A., additional, Hughes, D. H., additional, Montaña, A., additional, Narayanan, G., additional, González, D. Rosa, additional, Sánchez-Argüelles, D., additional, Schloerb, F. P., additional, Snell, R. L., additional, Vega, O., additional, Wilson, G. W., additional, Zeballos, M., additional, Chavez, M., additional, Cybulski, R., additional, Díaz-Santos, T., additional, Luz, V. De la, additional, Erickson, N., additional, Ferrusca, D., additional, Gim, H. B., additional, Heyer, M. H., additional, Iono, D., additional, Pope, A., additional, Rogstad, S. M., additional, Scott, K. S., additional, Souccar, K., additional, Terlevich, E., additional, Terlevich, R., additional, Wilner, D., additional, and Zavala, J. A., additional

Published
2015
Full Text
View/download PDF

24. The nuclear and extended infrared emission of the Seyfert galaxy NGC 2992 and the interacting system Arp 245

Author

García-Bernete, I., primary, Ramos Almeida, C., additional, Acosta-Pulido, J. A., additional, Alonso-Herrero, A., additional, Sánchez-Portal, M., additional, Castillo, M., additional, Pereira-Santaella, M., additional, Esquej, P., additional, González-Martín, O., additional, Díaz-Santos, T., additional, Roche, P., additional, Fisher, S., additional, Pović, M., additional, Pérez García, A. M., additional, Valtchanov, I., additional, Packham, C., additional, and Levenson, N. A., additional

Published
2015
Full Text
View/download PDF

25. A mid-infrared view of the inner parsecs of the Seyfert galaxy Mrk 1066 using CanariCam/GTC

Author

Ramos Almeida, C., primary, Alonso-Herrero, A., additional, Esquej, P., additional, González-Martín, O., additional, Riffel, R. A., additional, García-Bernete, I., additional, Rodríguez Espinosa, J. M., additional, Packham, C., additional, Levenson, N. A., additional, Roche, P., additional, Díaz-Santos, T., additional, Aretxaga, I., additional, and Álvarez, C., additional

Published
2014
Full Text
View/download PDF

26. Nuclear 11.3 μm PAH emission in local active galactic nuclei

Author

Alonso-Herrero, A., primary, Ramos Almeida, C., additional, Esquej, P., additional, Roche, P. F., additional, Hernán-Caballero, A., additional, Hönig, S. F., additional, González-Martín, O., additional, Aretxaga, I., additional, Mason, R. E., additional, Packham, C., additional, Levenson, N. A., additional, Rodríguez Espinosa, J. M., additional, Siebenmorgen, R., additional, Pereira-Santaella, M., additional, Díaz-Santos, T., additional, Colina, L., additional, Alvarez, C., additional, and Telesco, C. M., additional

Published
2014
Full Text
View/download PDF

27. The build-up of nuclear stellar cusps in extreme starburst galaxies and major mergers

Author

Haan, S., primary, Armus, L., additional, Surace, J. A., additional, Charmandaris, V., additional, Evans, A. S., additional, Diaz-Santos, T., additional, Melbourne, J. L., additional, Mazzarella, J. M., additional, Howell, J. H., additional, Stierwalt, S., additional, Kim, D. C., additional, Vavilkin, T., additional, Sanders, D. B., additional, Petric, A., additional, Murphy, E. J., additional, Braun, R., additional, Bridge, C. R., additional, and Inami, H., additional

Published
2013
Full Text
View/download PDF

28. A mid-infrared spectroscopic atlas of local active galactic nuclei on sub-arcsecond resolution using GTC/CanariCam.

Author

Alonso-Herrero, A., Esquej, P., Roche, P. F., Almeida, C. Ramos, González-Martín, O., Packham, C., Levenson, N. A., Mason, R. E., Hernán-Caballero, A., Pereira-Santaella, M., Alvarez, C., Aretxaga, I., López-Rodríguez, E., Colina, L., Díaz-Santos, T., Imanishi, M., Espinosa, J. M. Rodríguez, and Perlman, E.

Subjects
SPECTROSCOPIC imaging, GALACTIC nuclei, OPTICAL resolution, LUMINOSITY, POLYCYCLIC aromatic compounds
Abstract

We present an atlas of mid-infrared (mid-IR) ~7.5-13 μm spectra of 45 local active galactic nuclei (AGN) obtained with CanariCam on the 10.4 m Gran Telescopio CANARIAS (GTC) as part of an ESO/GTC large programme. The sample includes Seyferts and other lowluminosity AGN (LLAGN) at a median distance of 35 Mpc and luminous AGN, namely PG quasars, (U)LIRGs, and radio galaxies (RG) at a median distance of 254 Mpc. To date, this is the largest mid-IR spectroscopic catalogue of local AGN at sub-arcsecond resolution (median 0.3 arcsec). The goal of this work is to give an overview of the spectroscopic properties of the sample. The nuclear 12 μm luminosities of the AGN span more than four orders of magnitude, vL12μm ~ 3 × 1041-1046 erg s-1. In a simple mid-IR spectral index versus strength of the 9.7 μm silicate feature diagram most LLAGN, Seyfert nuclei, PG quasars, and RGs lie in the region occupied by clumpy torus model tracks. However, the mid-IR spectra of some might include contributions from other mechanisms. Most (U)LIRG nuclei in our sample have deeper silicate features and flatter spectral indices than predicted by these models suggesting deeply embedded dust heating sources and/or contribution from star formation. The 11.3 μm polycyclic aromatic hydrocarbon (PAH) feature is clearly detected in approximately half of the Seyfert nuclei, LLAGN, and (U)LIRGs. While the RG, PG quasars, and (U)LIRGs in our sample have similar nuclear vL12μm, we do not detect nuclear PAH emission in the RGs and PG quasars. [ABSTRACT FROM AUTHOR]

Published
2016
Full Text
View/download PDF

29. Early Science with the Large Millimeter Telescope: CO and [C II] Emission in the z = 4.3 AzTEC J095942.9+022938 (COSMOS AzTEC-1).

Author

Yun, Min S., Aretxaga, I., Gurwell, M. A., Hughes, D. H., Montaña, A., Narayanan, G., González, D. Rosa, Sánchez-Argüelles, D., Schloerb, F. P., Snell, R. L., Vega, O., Wilson, G. W., Zeballos, M., Chavez, M., Cybulski, R., Díaz-Santos, T., De la Luz, V., Erickson, N., Ferrusca, D., and Gim, H. B.

Subjects
MILLIMETER astronomy, TELESCOPES, GALACTIC redshift, STARBURSTS, SUBMILLIMETER astronomy
Abstract

Measuring redshifted CO line emission is an unambiguous method for obtaining an accurate redshift and total cold gas content of optically faint, dusty starburst systems. Here, we report the first successful spectroscopic redshift determination of AzTEC J095942.9+022938 ('COSMOS AzTEC-1'), the brightest 1.1 mm continuum source found in the AzTEC/James Clerk Maxwell Telescope survey (Scott et al.), through a clear detection of the redshifted CO (4-3) and CO (5-4) lines using the Redshift Search Receiver on the Large Millimeter Telescope. The CO redshift of z = 4.3420 ± 0.0004 is confirmed by the detection of the redshifted 158 μm [C II] line using the Submillimeter Array. The new redshift and Herschel photometry yield LFIR = (1.1 ± 0.1) × 1013 L⊙ and SFR ≈ 1300 M⊙ yr−1. Its molecular gas mass derived using the ultraluminous infrared galaxy conversion factor is 1.4 ± 0.2 × 1011M⊙ while the total interstellar medium mass derived from the 1.1 mm dust continuum is 3.7 ± 0.7 × 1011M⊙ assuming Td = 35 K. Our dynamical mass analysis suggests that the compact gas disc (r ≈ 1.1 kpc, inferred from dust continuum and spectral energy distribution analysis) has to be nearly face-on, providing a natural explanation for the uncommonly bright, compact stellar light seen by the HST. The [C II] line luminosity L[C II]=7.8±1.1×109L⊙ is remarkably high, but it is only 0.04 per cent of the total IR luminosity. AzTEC COSMOS-1 and other high redshift sources with a spatially resolved size extend the tight trend seen between [C II]/FIR ratio and ΣFIR among IR-bright galaxies reported by Díaz-Santos et al. by more than an order of magnitude, supporting the explanation that the higher intensity of the IR radiation field is responsible for the '[C II] deficiency' seen among luminous starburst galaxies. [ABSTRACT FROM AUTHOR]

Published
2015
Full Text
View/download PDF

30. A mid-infrared view of the inner parsecs of the Seyfert galaxy Mrk 1066 using CanariCam/GTC.

Author

Almeida, C. Ramos, Alonso-Herrero, A., Esquej, P., González-Martín, O., Riffel, R. A., García-Bernete, I., Espinosa, J. M. Rodríguez, Packham, C., Levenson, N. A., Roche, P., Díaz-Santos, T., Aretxaga, I., and Álvarez, C.

Subjects
PARSEC, SEYFERT galaxies, ACTIVE galactic nuclei, STARBURSTS, GALAXY formation
Abstract

We present mid-infrared (MIR) imaging and spectroscopic data of the Seyfert 2 galaxy Mrk 1066 obtained with CanariCam (CC) on the 10.4-m Gran Telescopio CANARIAS (GTC). The galaxy was observed in imaging mode with an angular resolution of 0.24 arcsec (54 pc) in the Si-2 filter (8.7 μm). The image reveals a series of star-forming knots within the central ∼400 pc, after subtracting the dominant active galactic nucleus (AGN) component. We also subtracted this AGN unresolved component from the 8-13 μm spectra of the knots and the nucleus, and measured equivalent widths (EWs) of the 11.3 μm polycyclic aromatic hydrocarbon (PAH) feature which are typical of pure starburst galaxies. This EW is larger in the nucleus than in the knots, confirming that, at least in the case of Mrk 1066, the AGN dilutes, rather than destroys, the molecules responsible for the 11.3 μm PAH emission. By comparing the nuclear GTC/CC spectrum with the Spitzer/Infrared Spectrograph (IRS) spectrum of the galaxy, we find that the AGN component that dominates the continuum emission at λ < 15 μm on scales of ∼60 pc (90-100 per cent) decreases to 35-50 per cent when the emission of the central ∼830 pc is considered. On the other hand, the AGN contribution dominates the 15-25 μm emission (75 per cent) on the scales probed by Spitzer/IRS. We reproduced the nuclear infrared emission of the galaxy with clumpy torus models, and derived a torus gas mass of 2 × 105 M⊙, contained in a clumpy structure of ∼2 pc radius and with a column density compatible with Mrk 1066 being a Compton-thick candidate, in agreement with X-ray observations. We find a good match between the MIR morphology of Mrk 1066 and the extended Paβ, Brγ and [O III] λ5007 emission. This coincidence implies that the 8.7 μm emission is probing star formation, dust in the narrow-line region and the oval structure previously detected in the near-infrared. On the other hand, the Chandra soft X-ray morphology does not match any of the previous, contrary to what it is generally assumed for Seyfert galaxies. A thermal origin for the soft X-ray emission, rather than AGN photoionization, is suggested by the different data analysed here. [ABSTRACT FROM AUTHOR]

Published
2014
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results