Galaxy And Mass Assembly (GAMA): growing up in a bad neighbourhood – how do low-mass galaxies become passive?

Both theoretical predictions and observations of the very nearby Universe suggest that low-mass galaxies(log10[M */M⊙] < 9.5) are likely to remain star-forming unless they are affected by their local environment. To test this premise, we compare and contrast the local environment of both passive...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2016-02, Vol.455 (4), p.4013-4029
Main Authors: Davies, L. J. M., Robotham, A. S. G., Driver, S. P., Alpaslan, M., Baldry, I. K., Bland-Hawthorn, J., Brough, S., Brown, M. J. I., Cluver, M. E., Holwerda, B. W., Hopkins, A. M., Lara-López, M. A., Mahajan, S., Moffett, A. J., Owers, M. S., Phillipps, S.
Format: Article
Language:English
Subjects:
Assembly
Cosmology
Forming
Galaxies
Mathematical models
Star & galaxy formation
Star formation
Stellar mass
Symbols
Universe
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Summary:Both theoretical predictions and observations of the very nearby Universe suggest that low-mass galaxies(log10[M */M⊙] < 9.5) are likely to remain star-forming unless they are affected by their local environment. To test this premise, we compare and contrast the local environment of both passive and star-forming galaxies as a function of stellar mass, using the Galaxy and Mass Assembly survey. We find that passive fractions are higher in both interacting pair and group galaxies than the field at all stellar masses, and that this effect is most apparent in the lowest mass galaxies. We also find that essentially all passive log10[M */M⊙] 
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/stv2573