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A surprising consistency between the far-infrared galaxy luminosity functions of the field and Coma.

Hickinbottom, S and Simpson, C. J. and James, P. A. and Ibar, E. and Carter, D. and Boselli, A. and Collins, C. A. and Davies, J. I. and Dunne, L. and Eales, S. and Fuller, C. and Mobasher, B. and Peletier, R. F. and Phillipps, S. and Smith, D. J. B. and Smith, R. J. and Valentijn, E. A. (2014) 'A surprising consistency between the far-infrared galaxy luminosity functions of the field and Coma.', Monthly notices of the Royal Astronomical Society., 442 (2). pp. 1286-1293.


We present new deep images of the Coma Cluster from the ESA Herschel Space Observatory at wavelengths of 70, 100 and 160 μm, covering an area of 1.75 × 1.0 square degrees encompassing the core and south-west infall region. Our data display an excess of sources at flux densities above 100 mJy compared to blank-field surveys, as expected. We use extensive optical spectroscopy of this region to identify cluster members and hence produce cluster luminosity functions in all three photometric bands. We compare our results to the local field galaxy luminosity function, and the luminosity functions from the Herschel Virgo Cluster Survey. We find consistency between the shapes of the Coma and field galaxy luminosity functions at all three wavelengths; however, we do not find the same level of agreement with that of the Virgo Cluster.

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Publisher statement:This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Date accepted:No date available
Date deposited:28 July 2014
Date of first online publication:August 2014
Date first made open access:No date available

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