Barsanti_2018_ApJ_857_71.pdf (2.64 MB)
Galaxy and mass assembly (GAMA): impact of the group environment on galaxy star formation
Version 2 2023-06-19, 09:44
Version 1 2023-06-19, 08:20
journal contribution
posted on 2023-06-19, 09:44 authored by S Barsanti, M S Owers, S Brough, L J M Davies, S P Driver, M L P Gunawardhana, B W Holwerda, J Liske, Jonathan LovedayJonathan Loveday, K A Pimbblet, A S G Robotham, E N TaylorWe explore how the group environment may affect the evolution of star-forming galaxies. We select 1197 Galaxy And Mass Assembly (GAMA) groups at 0.05=z=0.2 and analyze the projected phase space (PPS) diagram, i.e. the galaxy velocity as a function of projected group-centric radius, as a local environmental metric in the low-mass halo regime 10 12 =(M200/M?)<10^14. We study the properties of star-forming group galaxies, exploring the correlation of star formation rate (SFR) with radial distance and stellar mass. We find that the fraction of star-forming group members is higher in the PPS regions dominated by recently accreted galaxies, whereas passive galaxies dominate the virialized regions. We observe a small decline in specific SFR of star-forming galaxies towards the group center by a factor ~1.2 with respect to field galaxies. Similar to cluster studies, we conclude for low-mass halos that star-forming group galaxies represent an infalling population from the field to the halo and show suppressed star formation.
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Publication status
- Published
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- Published version
Journal
Astrophysical JournalISSN
0004-637XPublisher
Institute of PhysicsExternal DOI
Issue
71Volume
857Page range
1-18Department affiliated with
- Physics and Astronomy Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2018-03-19First Open Access (FOA) Date
2018-04-26First Compliant Deposit (FCD) Date
2018-03-16Usage metrics
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