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Environments and morphologies of red sequence galaxies with residual star formation in massive clusters

Crossett, Jacob P.; Pimbblet, Kevin A.; Stott, John; Stott, John P.; Jones, D. Heath

Authors

Jacob P. Crossett

John Stott

John P. Stott

D. Heath Jones

Abstract

We present a photometric investigation into recent star formation in galaxy clusters at z ∼ 0.1. We use spectral energy distribution templates to quantify recent star formation in large Xray-selected clusters from the LARCS survey using matched GALEX near-ultraviolet (NUV) photometry. These clusters all have signs of red sequence galaxy recent star formation (as indicated by the blue NUV − R colour), regardless of the cluster morphology and size. A trend in environment is found for these galaxies, such that they prefer to occupy low-density, highcluster-radius environments. The morphology of these UV-bright galaxies suggests that they are in fact red spirals, which we confirm with light profiles and Galaxy Zoo voting percentages as morphological proxies. These UV-bright galaxies are therefore seen to be either truncated spiral galaxies, caught by ram pressure infalling into the cluster, or high-mass spirals, with the photometry dominated by the older stellar population.

Journal Article Type Article
Publication Date Jan 21, 2014
Journal Monthly notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Oxford University Press (OUP)
Peer Reviewed Peer Reviewed
Volume 437
Issue 3
Pages 2521-2530
Institution Citation Crossett, J. P., Pimbblet, K. A., Stott, J. P., & Jones, D. H. (2014). Environments and morphologies of red sequence galaxies with residual star formation in massive clusters. Monthly notices, containing papers, abstracts of papers, and reports of the proceedings of the Society, 437(3), 2521-2530. https://doi.org/10.1093/mnras/stt2065
DOI https://doi.org/10.1093/mnras/stt2065
Keywords Space and Planetary Science; Astronomy and Astrophysics
Publisher URL http://mnras.oxfordjournals.org/content/437/3/2521.full
Copyright Statement © 2013 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 ©: 2013 The authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

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Copyright Statement
© 2013 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society



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