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.

Baes, M., Clemens, M., Xilouris, E., Fritz, J., Cotton, W., Davies, J., et al. (2010). The Herschel Virgo Cluster Survey. VI. The far-infrared view of M 87. ASTRONOMY & ASTROPHYSICS, 518(4), L53-L53 [10.1051/0004-6361/201014555].

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

GAVAZZI, GIUSEPPE;
2010

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.
Articolo in rivista - Articolo scientifico
galaxies: individual: M 87, radiation mechanisms: thermal, radiation mechanisms: non-thermal, infrared: galaxies
English
2010
518
4
L53
L53
none
Baes, M., Clemens, M., Xilouris, E., Fritz, J., Cotton, W., Davies, J., et al. (2010). The Herschel Virgo Cluster Survey. VI. The far-infrared view of M 87. ASTRONOMY & ASTROPHYSICS, 518(4), L53-L53 [10.1051/0004-6361/201014555].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/48726
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