The SAMI Galaxy Survey: Spatially resolving the environmental quenching of star formation in GAMA galaxies ...

• Main Authors: Schaefer, A. L., Gunawardhana, M. L. P., Norberg, P., Alpaslan, M., Bauer, A. E., Bekki, K., Bland-Hawthorn, J., Bloom, J. V., Bryant, J. J., Couch, Warrick, Driver, S. P., Croom, S. M., Fogarty, L. M. R., Foster, C., Goldstein, G., Green, A. W., Hopkins, A. M., Konstantopoulos, I. S., Lawrence, J. S., López-Sánchez, A. R., Lorente, N. P. F., Owers, M. S., Allen, J. T., Sharp, R., Sweet, Sarah, Taylor, Edward, van de Sande, J., Walcher, C. J., Wong, O. I., Brough, S., Medling, A. M., Ho, I. -T., Scott, N., Richards, S. N., Pracy, M. B.
• Format: Text
• Language: unknown
• Published: Swinburne 2024
• Subjects: Cosmology and extragalactic astronomy; sami
• Online Access: https://dx.doi.org/10.25916/sut.26227961; https://figshare.swinburne.edu.au/articles/journal_contribution/The_SAMI_Galaxy_Survey_Spatially_resolving_the_environmental_quenching_of_star_formation_in_GAMA_galaxies/26227961

We use data from the Sydney-AAO Multi-Object Integral Field Spectrograph Galaxy Survey and the Galaxy And Mass Assembly (GAMA) survey to investigate the spatially resolved signatures of the environmental quenching of star formation in galaxies. Using dust-corrected measurements of the distribution of Ha emission, we measure the radial profiles of star formation in a sample of 201 star-forming galaxies covering three orders of magnitude in stellar mass (M*; 108.1-1010.95M⊙) and in fifth nearest neighbour local environment density (∑5; 10-1.3-102.1 Mpc-2). We show that star formation rate gradients in galaxies are steeper in dense (log10(∑5/Mpc2) > 0.5) environments by 0.58 ± 0.29 dex re-1 in galaxies with stellar masses in the range 1010 < M*/M⊙ < 1011 and that this steepening is accompanied by a reduction in the integrated star formation rate. However, for any given stellar mass or environment density, the star formation morphology of galaxies shows large scatter. We also measure the degree to which ...