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Journal Article

The SAMI Galaxy Survey: observing the environmental quenching of star formation in GAMA groups

MPS-Authors

Schaefer,  A. L.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Croom,  S. M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Scott,  N.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Brough,  S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Allen,  J. T.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bekki,  K.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bland-Hawthorn,  J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bloom,  J. V.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bryant,  J. J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Cortese,  L.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Davies,  L. J. M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Federrath,  C.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Fogarty,  L. M. R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Green,  A. W.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Groves,  B.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Hopkins,  A. M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Konstantopoulos,  I. S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

López-Sánchez,  A. R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lawrence,  J. S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

McElroy,  R. E.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Medling,  A. M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Owers,  M. S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Pracy,  M. B.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Richards,  S. N.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Robotham,  A. S. G.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

van de Sande,  J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Tonini,  C.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Yi,  S. K.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

External Resource

https://ui.adsabs.harvard.edu/abs/2019MNRAS.483.2851S
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Citation

Schaefer, A. L., Croom, S. M., Scott, N., Brough, S., Allen, J. T., Bekki, K., et al. (2019). The SAMI Galaxy Survey: observing the environmental quenching of star formation in GAMA groups. Monthly Notices of the Royal Astronomical Society, 483, 2851-2870.


Cite as: https://hdl.handle.net/21.11116/0000-0005-CFDA-D
Abstract
We explore the radial distribution of star formation in galaxies in the SAMI Galaxy Survey as a function of their Local Group environment. Using a sample of galaxies in groups (with halo masses less than ̃eq 10^{14} M_☉) from the Galaxy And Mass Assembly Survey, we find signatures of environmental quenching in high-mass groups (M_{ G} > 10^{12.5} M_{☉}). The mean integrated specific star formation rate (sSFR) of star- forming galaxies in high-mass groups is lower than for galaxies in low- mass groups or those that are ungrouped, with ∆ log ( sSFR/yr^{-1}) = 0.45 ± 0.07. This difference is seen at all galaxy stellar masses. In high-mass groups, star-forming galaxies more massive than M_{*} ̃ 10^{10} M_{☉} have centrally concentrated star formation. These galaxies also lie below the star formation main sequence, which suggests they may be undergoing outside-in quenching. Lower mass galaxies in high-mass groups do not show evidence of concentrated star formation. In groups less massive than M_{ G} = 10^{12.5} M_{☉}, we do not observe these trends. In this regime, we find a modest correlation between centrally concentrated star formation and an enhancement in the total star formation rate, consistent with triggered star formation in these galaxies.