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

Baes, Maarten, Clemens, M., Xilouris, E. M., Fritz, J., Cotton, W. D., Davies, Jonathan Ivor, Bendo, George J., Bianchi, S., Cortese, Luca, De Looze, I., Pohlen, Michael, Verstappen, J., Böhringer, H., Bomans, D. J., Boselli, A., Corbelli, E., Dariush, Aliakbar, di Serego Alighieri, S., Fadda, D., Garcia-Appadoo, D. A., Gavazzi, G., Giovanardi, C., Grossi, M., Hughes, Thomas Marcus, Hunt, L. K., Jones, A. P., Madden, S., Pierini, D., Sabatini, S., Smith, Matthew William L., Vlahakis, C. and Zibetti, S. 2010. The Herschel Virgo Cluster Survey - VI. The far-infrared view of M 87 [Letter]. Astronomy & Astrophysics 518 , L53. 10.1051/0004-6361/201014555

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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.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: galaxies: individual: M 87 ; radiation mechanisms: thermal ; radiation mechanisms: non-thermal ; infrared: galaxies
Additional Information: Letter to the editor. Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/0004-6361/ (accessed 16/04/2014)
Publisher: EDP Sciences
ISSN: 0004-6361
Date of First Compliant Deposit: 30 March 2016
Last Modified: 09 Apr 2019 20:47
URI: http://orca-mwe.cf.ac.uk/id/eprint/32725

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