Herschel photometry of brightest cluster galaxies in cooling flow clusters
The dust destruction timescales in the cores of clusters of galaxies are relatively short given their high central gas densities. However, substantial mid-infrared and sub-mm emission has been detected in many brightest cluster galaxies. In this letter we present Herschel PACS and SPIRE photometry o...
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Published in | Astronomy and astrophysics (Berlin) Vol. 518; no. 1; p. L47 |
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Main Authors | , , , , , , , , , , , , , , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Les Ulis
EDP Sciences
01.07.2010
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Subjects | |
Online Access | Get full text |
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Summary: | The dust destruction timescales in the cores of clusters of galaxies are relatively short given their high central gas densities. However, substantial mid-infrared and sub-mm emission has been detected in many brightest cluster galaxies. In this letter we present Herschel PACS and SPIRE photometry of the brightest cluster galaxy in three strong cooling flow clusters, A1068, A2597 and Zw3146. This photometry indicates that a substantial mass of cold dust is present (> 3×107 $M_\odot$) at temperatures significantly lower (20–28 K) than previously thought based on limited MIR and/or sub-mm results. The mass and temperature of the dust appear to match those of the cold gas traced by CO with a gas-to-dust ratio of 80–120. |
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Bibliography: | publisher-ID:aa14572-10 istex:D53DC775CA212C932B914FBB81EF079C0D5D9DE9 Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA. other:2010A%26A...518L..47E ark:/67375/80W-RTCGQ78J-Q |
ISSN: | 0004-6361 1432-0746 1432-0756 |
DOI: | 10.1051/0004-6361/201014572 |