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The far-infrared view of M87 as seen by the Herschel Space Observatory

Published online by Cambridge University Press:  24 February 2011

M. Baes
Affiliation:
Sterrenkundig Observatorium, Universiteit Gent, Belgium
M. Clemens
Affiliation:
INAF-Osservatorio Astronomico di Padova, Italy
E. M. Xilouris
Affiliation:
National Observatory of Athens, Greece
J. Fritz
Affiliation:
Sterrenkundig Observatorium, Universiteit Gent, Belgium
W. D. Cotton
Affiliation:
National Radio Astronomy Observatory, USA
J. I. Davies
Affiliation:
Department of Physics and Astronomy, Cardiff University, UK
G. J. Bendo
Affiliation:
Astrophysics Group, Imperial College London, UK
S. Bianchi
Affiliation:
INAF-Osservatorio Astrofisico di Arcetri, Firenze, Italy
L. Cortese
Affiliation:
Department of Physics and Astronomy, Cardiff University, UK
I. De Looze
Affiliation:
Sterrenkundig Observatorium, Universiteit Gent, Belgium
M. Pohlen
Affiliation:
Department of Physics and Astronomy, Cardiff University, UK
J. Verstappen
Affiliation:
Sterrenkundig Observatorium, Universiteit Gent, Belgium
H. Böhringer
Affiliation:
Max-Planck-Institut für Extraterrestrische Physik, Garching, Germany
D. J. Bomans
Affiliation:
Astronomical Institute, Ruhr-University Bochum, Germany
A. Boselli
Affiliation:
Laboratoire d'Astrophysique de Marseille, France
E. Corbelli
Affiliation:
INAF-Osservatorio Astrofisico di Arcetri, Firenze, Italy
A. Dariush
Affiliation:
Department of Physics and Astronomy, Cardiff University, UK
S. di Serego Alighieri
Affiliation:
INAF-Osservatorio Astrofisico di Arcetri, Firenze, Italy
D. Fadda
Affiliation:
NASA Herschel Science Center, California Institute of Technology, USA
D. A. Garcia-Appadoo
Affiliation:
European Southern Observatory, Santiago, Chile
G. Gavazzi
Affiliation:
Università di Milano-Bicocca, Italy
C. Giovanardi
Affiliation:
INAF-Osservatorio Astrofisico di Arcetri, Firenze, Italy
M. Grossi
Affiliation:
CAAUL, Observatório Astronómico de Lisboa, Portugal
T. M. Hughes
Affiliation:
Department of Physics and Astronomy, Cardiff University, UK
L. K. Hunt
Affiliation:
INAF-Osservatorio Astrofisico di Arcetri, Firenze, Italy
A. P. Jones
Affiliation:
Institut d'Astrophysique Spatiale (IAS), Université Paris-Sud 11, France
S. Madden
Affiliation:
Laboratoire AIM, CEA/DSM, Université Paris Diderot, France
D. Pierini
Affiliation:
Max-Planck-Institut für Extraterrestrische Physik, Garching, Germany
S. Sabatini
Affiliation:
INAF-Istituto di Astrofisica Spaziale e Fisica Cosmica, Roma, Italy
M. W. L. Smith
Affiliation:
Department of Physics and Astronomy, Cardiff University, UK
C. Vlahakis
Affiliation:
Leiden Observatory, The Netherlands
S. Zibetti
Affiliation:
Max-Planck-Institut für Astronomie, Heidelberg, Germany
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Abstract

The origin of the far-infrared emission from the nearby radio galaxy M87 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 observed M87 with PACS and SPIRE as part of the Herschel Virgo Cluster Survey (HeViCS). We compare the new Herschel data with a synchrotron model based on infrared, submm and radio data to investigate the origin of the far-infrared emission. We find that 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 M87.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2011

References

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