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The rarity of star formation in brightest cluster galaxies as measured by WISE

Fraser-McKelvie, Amelia; Brown, Michael J. I.; Pimbblet, Kevin A.

Authors

Amelia Fraser-McKelvie

Michael J. I. Brown



Abstract

We present the mid-infrared star formation rates of 245 X-ray selected, nearby (z < 0.1) brightest cluster galaxies (BCGs). A homogeneous and volume limited sample of BCGs was created by X-ray selecting clusters with Lx > 1 × 1044 erg s⁻ ¹. The Wide-Field Infrared Survey Explorer (WISE) All WISE Data Release provides the first measurement of the 12 μm star formation indicator for all BCGs in the nearby Universe. Perseus A and Cygnus A are the only galaxies in our sample to have star formation rates of > 40 M⊙ yr⁻¹, indicating that these two galaxies are highly unusual at current times. Stellar populations of 99 ± 0.6 per cent of local BCGs are (approximately) passively evolving, with star formation rates of < 10 M⊙ yr⁻¹. We find that in general, star formation produces only modest BCG growth at the current epoch.

Journal Article Type Article
Publication Date Oct 11, 2014
Journal Monthly notices of the Royal Astronomical Society Letters
Electronic ISSN 1745-3925
Publisher Oxford University Press (OUP)
Peer Reviewed Peer Reviewed
Volume 444
Issue 1
Pages L63-L67
APA6 Citation Fraser-McKelvie, A., Brown, M. J. I., & Pimbblet, K. A. (2014). The rarity of star formation in brightest cluster galaxies as measured by WISE. Monthly notices of the Royal Astronomical Society. Letters, 444(1), L63-L67. https://doi.org/10.1093/mnrasl/slu117
DOI https://doi.org/10.1093/mnrasl/slu117
Keywords Galaxies -- clusters -- general; Galaxies -- elliptical and lenticular; cD; Galaxies -- star formation; Infrared -- galaxies
Publisher URL http://mnrasl.oxfordjournals.org/content/444/1/L63.abstract
Copyright Statement © 2014 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society
Additional Information 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.

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Copyright Statement
© 2014 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society





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