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Active galactic nucleus feedback drives the colour evolution of local galaxies
journal contribution
posted on 2023-05-17, 07:47 authored by Stanislav ShabalaStanislav Shabala, Kaviraj, S, Silk, JWe investigate the effects of active galactic nucleus (AGN) feedback on the colour evolution of galaxies found in local (z < 0.2) groups and clusters. Galaxies located within the lobes of powerful Fanaroff–Riley type II (FR II) (edge-brightened) sources show much redder colours than neighbouring galaxies that are not spatially coincident with the radio source. By contrast, no similar effect is seen near FR I (core-dominated) radio sources.We show that these colours are consistent with FR II sources truncating star formation as the expanding bowshock overruns a galaxy. We examine a sample of clusters with no detectable radio emission and show that galaxy colours in these clusters carry an imprint of past AGN feedback. The AGN activity in the low-redshift Universe is predominantly driven by low-luminosity radio sources with short duty cycles. Our results show that, despite their rarity, feedback from powerful radio sources is an important driver of galaxy evolution even in the local volume.
History
Publication title
Monthly Notices of the Royal Astronomical SocietyVolume
413Issue
4Pagination
2815-2826ISSN
1365-2966Department/School
School of Natural SciencesPublisher
Wiley-Blackwell Publishing LtdPlace of publication
United KingdomRights statement
Copyright © 2011. The definitive published version is available online at: http://onlinelibrary.wiley.com/Repository Status
- Restricted