The Herschel Virgo Cluster Survey - VIII. The Bright Galaxy Sample
Por:
Davies J.I., Bianchi S., Cortese L., Auld R., Baes M., Bendo G.J., Boselli A., Ciesla L., Clemens M., Corbelli E., De Looze I., Alighieri S.D.S., Fritz J., Gavazzi G., Pappalardo C., Grossi M., Hunt L.K., Madden S., Magrini L., Pohlen M., Smith M.W.L., Verstappen J., Vlahakis C.
Publicada:
1 ene 2012
Resumen:
We describe the Herschel Virgo Cluster Survey and the first data that cover the complete survey area (four 4 × 4 deg 2 regions). We use these data to measure and compare the global far-infrared properties of 78 optically bright galaxies that are selected at 500µm and detected in all five far-infrared bands. We show that our measurements and calibration are broadly consistent with previous data obtained by the IRAS, ISO, Spitzer and Planck. We use SPIRE and PACS photometry data to produce 100-, 160-, 250-, 350- and 500-µm cluster luminosity distributions. These luminosity distributions are not power laws, but 'peaked', with small numbers of both faint and bright galaxies. We measure a cluster 100-500µm far-infrared luminosity density of 1.6(7.0) ± 0.2 × 10 9 L ?Mpc -3. This compares to a cluster 0.4-2.5µm optical luminosity density of 5.0(20.0) × 10 9 L ?Mpc -3, some 3.2(2.9) times larger than the far-infrared. A 'typical' photon originates from an optical depth of 0.4 ± 0.1. Most of our sample galaxies are well fitted by a single modified blackbody (ß= 2), leading to a mean dust mass of log M Dust= 7.31 M ? and temperature of 20.0K. We also derive both stellar and atomic hydrogen masses from which we calculate mean values for the star-to-gas (atomic) and gas (atomic)-to-dust mass ratios of 15.1 and 58.2, respectively. Using our derived dust, atomic gas and stellar masses, we estimate cluster mass densities of 8.6(27.8) × 10 6, 4.6(13.9) × 10 8 and 7.8(29.7) × 10 9 M ?Mpc -3 for dust, atomic gas and stars, respectively. These values are higher than those derived for field galaxies by factors of 39(126), 6(18) and 34(129), respectively. In the above, the luminosity/mass densities are given using the whole sample with the values in brackets using just those galaxies that lie between 17 and 23 Mpc. We provide a data table of flux densities in all the Herschel bands for all 78 bright Virgo Cluster galaxies. © 2011 The Authors Monthly Notices of the Royal Astronomical Society © 2011 RAS.
Filiaciones:
Davies J.I.:
School of Physics and Astronomy, Cardiff University, The Parade, Cardiff CF24 3AA, United Kingdom
Bianchi S.:
INAF-Osservatorio Astrofisico di Arcetri, Largo Enrico Fermi 5, 50125 Firenze, Italy
Cortese L.:
European Southern Observatory, Karl-Schwarzschild Strasse 2, 85748 Garching bei Muenchen, Germany
Auld R.:
School of Physics and Astronomy, Cardiff University, The Parade, Cardiff CF24 3AA, United Kingdom
Baes M.:
Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, B-9000 Gent, Belgium
Bendo G.J.:
Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
Boselli A.:
Laboratoire D'Astrophysique de Marseille, UMR 6110 CNRS, 38 rue F. Joliot-Curie, F-13388 Marseille, France
Ciesla L.:
Laboratoire D'Astrophysique de Marseille, UMR 6110 CNRS, 38 rue F. Joliot-Curie, F-13388 Marseille, France
Clemens M.:
INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padova, Italy
Corbelli E.:
INAF-Osservatorio Astrofisico di Arcetri, Largo Enrico Fermi 5, 50125 Firenze, Italy
De Looze I.:
Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, B-9000 Gent, Belgium
Alighieri S.D.S.:
INAF-Osservatorio Astrofisico di Arcetri, Largo Enrico Fermi 5, 50125 Firenze, Italy
Fritz J.:
Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, B-9000 Gent, Belgium
Gavazzi G.:
Universita' di Milano-Bicocca, piazza della Scienza 3, 20100 Milano, Italy
Pappalardo C.:
INAF-Osservatorio Astrofisico di Arcetri, Largo Enrico Fermi 5, 50125 Firenze, Italy
Grossi M.:
CAAUL, Observatório Astronómico de Lisboa, Universidade de Lisboa, Tapada da Ajuda, 1349-018 Lisboa, Portugal
Hunt L.K.:
INAF-Osservatorio Astrofisico di Arcetri, Largo Enrico Fermi 5, 50125 Firenze, Italy
Madden S.:
Laboratoire AIM, CEA/DSM - CNRS - Université Paris Diderot, Irfu/Service, Paris, France
Magrini L.:
INAF-Osservatorio Astrofisico di Arcetri, Largo Enrico Fermi 5, 50125 Firenze, Italy
Pohlen M.:
School of Physics and Astronomy, Cardiff University, The Parade, Cardiff CF24 3AA, United Kingdom
Smith M.W.L.:
School of Physics and Astronomy, Cardiff University, The Parade, Cardiff CF24 3AA, United Kingdom
Verstappen J.:
Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, B-9000 Gent, Belgium
Vlahakis C.:
Departamento de Astronomia, Universidad de Chile, Casilla 36-D, Santiago, Chile
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