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5 results on '"Corbelli E"'

1. The Herschel Virgo Cluster Survey. VI. The far-infrared view of M 87

Author

Baes, M, Clemens, M, Xilouris, E, Fritz, J, Cotton, W, Davies, J, Bendo, G, Bianchi, S, Cortese, L, De Looze, I, Pohlen, M, Verstappen, J, Böhringer, H, Bomans, D, Boselli, A, Corbelli, E, Dariush, A, di Serego Alighieri, S, Fadda, D, Garcia Appadoo, D, Gavazzi, G, Giovanardi, C, Grossi, M, Hughes, T, Hunt, L, Jones, A, Madden, S, Pierini, D, Sabatini, S, Smith, M, Vlahakis, C, Zibett, S, Xilouris, EM, Cotton, WD, Davies, JI, Bendo, GJ, Bomans, DJ, Garcia Appadoo, DA, Hughes, TM, Hunt, LK, Jones, AP, Smith, MWL, Vlahakis C, Zibett, S., GAVAZZI, GIUSEPPE, Baes, M, Clemens, M, Xilouris, E, Fritz, J, Cotton, W, Davies, J, Bendo, G, Bianchi, S, Cortese, L, De Looze, I, Pohlen, M, Verstappen, J, Böhringer, H, Bomans, D, Boselli, A, Corbelli, E, Dariush, A, di Serego Alighieri, S, Fadda, D, Garcia Appadoo, D, Gavazzi, G, Giovanardi, C, Grossi, M, Hughes, T, Hunt, L, Jones, A, Madden, S, Pierini, D, Sabatini, S, Smith, M, Vlahakis, C, Zibett, S, Xilouris, EM, Cotton, WD, Davies, JI, Bendo, GJ, Bomans, DJ, Garcia Appadoo, DA, Hughes, TM, Hunt, LK, Jones, AP, Smith, MWL, Vlahakis C, Zibett, S., and GAVAZZI, GIUSEPPE

Abstract

The origin of the far-infrared emission from the nearby radio galaxy M 87 remains a matter of debate. Some studies find evidence of a far-infrared excess due to thermal dust emission, whereas others propose that the far-infrared emission can be explained by synchrotron emission without the need for an additional dust emission component. We present Herschel PACS and SPIRE observations of M 87, taken as part of the science demonstration phase observations of the Herschel Virgo Cluster Survey. We compare these data with a synchrotron model based on mid-infrared, far-infrared, submm and radio data from the literature to investigate the origin of the far-infrared emission. Both the integrated SED and the Herschel surface brightness maps are adequately explained by synchrotron emission. At odds with previous claims, we find no evidence of a diffuse dust component in M 87, which is not unexpected in the harsh X-ray environment of this radio galaxy sitting at the core of the Virgo cluster. © ESO 2010.

Published
2010

2. The Herschel Virgo Cluster Survey. IV. Resolved dust analysis of spiral galaxies

Author

Smith, M, Vlahakis, C, Baes, M, Bendo, G, Bianchi, S, Bomans, D, Boselli, A, Clemens, M, Corbelli, E, Cortese, L, Dariush, A, Davies, J, De Looze, I, di Serego Alighieri, S, Fadda, D, Fritz, J, Garcia Appadoo, D, Gavazzi, G, Giovanardi, C, Grossi, M, Hughes, T, Hunt, L, Jones, A, Madden, S, Pierini, D, Pohlen, M, Sabatini, S, Verstappen, J, Xilouris, E, Zibetti, S, Smith, MWL, Bendo, GJ, Bomans, DJ, Davies, JI, Garcia Appadoo, DA, GAVAZZI, GIUSEPPE, Hughes, TM, Hunt, LK, Jones, AP, Xilouris, EM, Zibetti, S., Smith, M, Vlahakis, C, Baes, M, Bendo, G, Bianchi, S, Bomans, D, Boselli, A, Clemens, M, Corbelli, E, Cortese, L, Dariush, A, Davies, J, De Looze, I, di Serego Alighieri, S, Fadda, D, Fritz, J, Garcia Appadoo, D, Gavazzi, G, Giovanardi, C, Grossi, M, Hughes, T, Hunt, L, Jones, A, Madden, S, Pierini, D, Pohlen, M, Sabatini, S, Verstappen, J, Xilouris, E, Zibetti, S, Smith, MWL, Bendo, GJ, Bomans, DJ, Davies, JI, Garcia Appadoo, DA, GAVAZZI, GIUSEPPE, Hughes, TM, Hunt, LK, Jones, AP, Xilouris, EM, and Zibetti, S.

Abstract

We present a resolved dust analysis of three of the largest angular size spiral galaxies, NGC 4501 and NGC 4567/8, in the Herschel Virgo Cluster Survey (HeViCS) science demonstration field. Herschel has unprecedented spatial resolution at far-infrared wavelengths and with the PACS and SPIRE instruments samples both sides of the peak in the far infrared spectral energy distribution (SED). We present maps of dust temperature, dust mass, and gas-to-dust ratio, produced by fitting modified black bodies to the SED for each pixel. We find that the distribution of dust temperature in both systems is in the range ∼19-22 K and peaks away from the centres of the galaxies. The distribution of dust mass in both systems is symmetrical and exhibits a single peak coincident with the galaxy centres. This Letter provides a first insight into the future analysis possible with a large sample of resolved galaxies to be observed by Herschel. © 2010 ESO.

Published
2010

3. The Herschel Virgo Cluster Survey. III. A constraint on dust grain lifetime in early-type galaxies

Author

Clemens, M, Jones, A, Bressan, A, Baes, M, Bendo, G, Bianchi, S, Bomans, D, Boselli, A, Corbelli, E, Cortese, L, Dariush, A, Davies, J, De Looze, I, di Serego Alighieri, S, Fadda, D, Fritz, J, Garcia Appadoo, D, Gavazzi, G, Giovanardi, C, Grossi, M, Hughes, T, Hunt, L, Madden, S, Pierini, D, Pohlen, M, Sabatini, S, Smith, M, Verstappen, J, Vlahakis, C, Xilouris, E, Zibetti, S, Clemens, MS, Jones, AP, Bendo, GJ, Bomans, DJ, Davies, JI, Garcia Appadoo, DA, GAVAZZI, GIUSEPPE, Hughes, TM, Hunt, LK, Smith, MWL, Xilouris, EM, Zibetti, S., Clemens, M, Jones, A, Bressan, A, Baes, M, Bendo, G, Bianchi, S, Bomans, D, Boselli, A, Corbelli, E, Cortese, L, Dariush, A, Davies, J, De Looze, I, di Serego Alighieri, S, Fadda, D, Fritz, J, Garcia Appadoo, D, Gavazzi, G, Giovanardi, C, Grossi, M, Hughes, T, Hunt, L, Madden, S, Pierini, D, Pohlen, M, Sabatini, S, Smith, M, Verstappen, J, Vlahakis, C, Xilouris, E, Zibetti, S, Clemens, MS, Jones, AP, Bendo, GJ, Bomans, DJ, Davies, JI, Garcia Appadoo, DA, GAVAZZI, GIUSEPPE, Hughes, TM, Hunt, LK, Smith, MWL, Xilouris, EM, and Zibetti, S.

Abstract

Passive early-type galaxies (ETGs) provide an ideal laboratory for studying the interplay between dust formation around evolved stars and its subsequent destruction in a hot gas. Using Spitzer-IRS and Herschel data we compare the dust production rate in the envelopes of evolved AGB stars with a constraint on the total dust mass. Early-type galaxies which appear to be truly passively evolving are not detected by Herschel. We thus derive a distance independent upper limit to the dust grain survival time in the hostile environment of ETGs of <46±25 Myr for amorphous silicate grains. This implies that ETGs which are detected at far-infrared wavelengths have acquired a cool dusty medium via interaction. Given likely time-scales for ram-pressure stripping, this also implies that only galaxies with dust in a cool (atomic) medium can release dust into the intra-cluster medium. © ESO 2010.

Published
2010

4. TheHerschelVirgo Cluster Survey

Author

De Looze, I, Baes, M, Zibetti, S, Fritz, J, Cortese, L, Davies, J, Verstappen, J, Bendo, G, Bianchi, S, Clemens, M, Bomans, D, Boselli, A, Corbelli, E, Dariush, A, Di Serego Alighieri, S, Fadda, D, Garcia Appadoo, D, Gavazzi, G, Giovanardi, C, Grossi, M, Hughes, T, Hunt, L, Jones, A, Madden, S, Pierini, D, Pohlen, M, Sabatini, S, Smith, M, Vlahakis, C, Xilouris, E, Davies, JI, Bendo, GJ, Bomans, DJ, Garcia Appadoo, DA, GAVAZZI, GIUSEPPE, Hughes, TM, Hunt, LK, Jones, AP, Smith, MWL, Xilouris, EM, De Looze, I, Baes, M, Zibetti, S, Fritz, J, Cortese, L, Davies, J, Verstappen, J, Bendo, G, Bianchi, S, Clemens, M, Bomans, D, Boselli, A, Corbelli, E, Dariush, A, Di Serego Alighieri, S, Fadda, D, Garcia Appadoo, D, Gavazzi, G, Giovanardi, C, Grossi, M, Hughes, T, Hunt, L, Jones, A, Madden, S, Pierini, D, Pohlen, M, Sabatini, S, Smith, M, Vlahakis, C, Xilouris, E, Davies, JI, Bendo, GJ, Bomans, DJ, Garcia Appadoo, DA, GAVAZZI, GIUSEPPE, Hughes, TM, Hunt, LK, Jones, AP, Smith, MWL, and Xilouris, EM

Abstract

We use the science demonstration phase data of the Herschel Virgo Cluster Survey to search for dust emission of early-type dwarf galaxies in the central regions of the Virgo cluster as an alternative way of identifying the interstellar medium. We present the first possible far-infrared detection of cluster early-type dwarf galaxies: VCC781 and VCC951 are detected at the 10(sigma) level in the SPIRE 250 mu m image. Both detected galaxies have dust masses of the order of 10(5) M-circle dot and average dust temperatures approximate to 20 K. The detection rate (less than 1%) is quite high compared to the 1.7% detection rate for Hi emission, considering that dwarfs in the central regions are more Hi deficient. We conclude that the removal of interstellar dust from dwarf galaxies resulting from ram pressure stripping, harassment, or tidal effects must be as efficient as the removal of interstellar gas.

Published
2010

5. The Herschel Virgo Cluster Survey

Author

Cortese, L, Davies, J, Pohlen, M, Baes, M, Bendo, G, Bianchi, S, Boselli, A, De Looze, I, Fritz, J, Verstappen, J, Bomans, D, Clemens, M, Corbelli, E, Dariush, A, di Serego Alighieri, S, Fadda, D, Garcia Appadoo, D, Gavazzi, G, Giovanardi, C, Grossi, M, Hughes, T, Hunt, L, Jones, A, Madden, S, Pierini, D, Sabatini, S, Smith, M, Vlahakis, C, Xilouris, E, Zibetti, S, Davies, JI, Bendo, GJ, Bomans, DJ, Garcia Appadoo, DA, GAVAZZI, GIUSEPPE, Hughes, TM, Hunt, LK, Jones, AP, Smith, MWL, Xilouris, EM, Zibetti, S., Cortese, L, Davies, J, Pohlen, M, Baes, M, Bendo, G, Bianchi, S, Boselli, A, De Looze, I, Fritz, J, Verstappen, J, Bomans, D, Clemens, M, Corbelli, E, Dariush, A, di Serego Alighieri, S, Fadda, D, Garcia Appadoo, D, Gavazzi, G, Giovanardi, C, Grossi, M, Hughes, T, Hunt, L, Jones, A, Madden, S, Pierini, D, Sabatini, S, Smith, M, Vlahakis, C, Xilouris, E, Zibetti, S, Davies, JI, Bendo, GJ, Bomans, DJ, Garcia Appadoo, DA, GAVAZZI, GIUSEPPE, Hughes, TM, Hunt, LK, Jones, AP, Smith, MWL, Xilouris, EM, and Zibetti, S.

Abstract

By combining Herschel-SPIRE observations obtained as part of the Herschel Virgo Cluster Survey with 21 cm Hi data from the literature, we investigate the role of the cluster environment on the dust content of Virgo spiral galaxies. We show for the first time that the extent of the dust disk is significantly reduced in Hi-deficient galaxies, following remarkably well the observed "truncation" of the Hi disk. The ratio of the submillimetre-to-optical diameter correlates with the Hi-deficiency, suggesting that the cluster environment is able to strip dust as well as gas. These results provide important insights not only into the evolution of cluster galaxies but also into the metal enrichment of the intra-cluster medium.

Published
2010

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