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

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

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.

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 of the Royal Astronomical Society, 437(3), 2521-2530. https://doi.org/10.1093/mnras/stt2065

• Journal Article Type: Article
• Acceptance Date: Oct 23, 2013
• Online Publication Date: Nov 28, 2013
• Publication Date: Jan 21, 2014
• Deposit Date: Jun 2, 2015
• Publicly Available Date: Jun 2, 2015
• Journal: Monthly notices of the Royal Astronomical Society
• Print ISSN: 0035-8711
• Electronic ISSN: 1365-2966
• Publisher: Oxford University Press
• Peer Reviewed: Peer Reviewed
• Volume: 437
• Issue: 3
• Pages: 2521-2530
• DOI: https://doi.org/10.1093/mnras/stt2065
• Keywords: Space and Planetary Science; Astronomy and Astrophysics
• Public URL: https://hull-repository.worktribe.com/output/374582
• Publisher URL: http://mnras.oxfordjournals.org/content/437/3/2521.full
• 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.
• Contract Date: Jun 2, 2015