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Galaxy And Mass Assembly (GAMA): Properties and evolution of red spiral galaxies

Pimbblet, Kevin; Mahajan, Smriti; Kamal Gupta, Kriti; Rana, Rahul; Brown, M J I; Phillipps, S; Bland-Hawthorn, Joss; Bremer, M N; Brough, S; Holwerda, B W; Hopkins, A M; Loveday, J; Pimbblet, Kevin; Wang, Lingyu

Authors

Smriti Mahajan

Kriti Kamal Gupta

Rahul Rana

M J I Brown

S Phillipps

Joss Bland-Hawthorn

M N Bremer

S Brough

B W Holwerda

A M Hopkins

J Loveday

Lingyu Wang



Abstract

We use multi-wavelength data from the Galaxy and Mass Assembly (GAMA) survey to explore the cause of red optical colours in nearby (0.002 < z < 0.06) spiral galaxies. We show that the colours of red spiral galaxies are a direct consequence of some environment-related mechanism(s) which has removed dust and gas, leading to a lower star formation rate. We conclude that this process acts on long timescales (several Gyr) due to a lack of morphological transformation associated with the transition in optical colour. The sSFR and dust-to-stellar mass ratio of red spiral galaxies is found to be statistically lower than blue spiral galaxies. On the other hand, red spirals are on average 0.9 dex more massive, and reside in environments 2.6 times denser than their blue counterparts. We find no evidence of excessive nuclear activity, or higher inclination angles to support these as the major causes for the red optical colours seen in ≳ 47% of all spirals in our sample. Furthermore, for a small subsample of our spiral galaxies which are detected in HI, we find that the SFR of gas-rich red spiral galaxies is lower by ∼1 dex than their blue counterparts.

Journal Article Type Article
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
APA6 Citation Mahajan, S., Kamal Gupta, K., Rana, R., Brown, M. J. I., Phillipps, S., Bland-Hawthorn, J., …Wang, L. (in press). Galaxy And Mass Assembly (GAMA): Properties and evolution of red spiral galaxies. Monthly notices, containing papers, abstracts of papers, and reports of the proceedings of the Society, https://doi.org/10.1093/mnras/stz2993
DOI https://doi.org/10.1093/mnras/stz2993
Keywords Space and Planetary Science; Astronomy and Astrophysics

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Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society, ©: 2019 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.







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