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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 ORCID:, 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. ORCID:, 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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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 (accessed 16/04/2014)
Publisher: EDP Sciences
ISSN: 0004-6361
Date of First Compliant Deposit: 30 March 2016
Last Modified: 11 Oct 2023 19:16

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