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Variable metallicity yields as tracers of inflows.
- Source :
- Proceedings of the International Astronomical Union; 6/9/2023, Vol. 17 Issue S373, p246-248, 3p
- Publication Year :
- 2023
-
Abstract
- Pristine gas accretion is expected to be the main driver of sustained star formation in galaxies. We measure the required amount of accreted gas at each moment over a galaxy's history to produce the observed metallicity at that time given its star-forming history. More massive galaxies tend to have higher accretion rates and a larger drop of the accretion rate towards the present time. Within the same mass bin galaxies that are currently star-forming or in the Green Valley have similar, sustained, accretion histories while retired galaxies had a steep decline in the past. Plotting the T80 of the individual accretion histories, a measure of how sustained they are, versus the stellar mass and current sSFR we see a distribution such that currently star-forming galaxies have sustained or recent accretion and retired galaxies have declined accretion histories. [ABSTRACT FROM AUTHOR]
- Subjects :
- GALAXIES
STELLAR mass
GALACTIC evolution
STAR formation
WAVELENGTHS
Subjects
Details
- Language :
- English
- ISSN :
- 17439213
- Volume :
- 17
- Issue :
- S373
- Database :
- Complementary Index
- Journal :
- Proceedings of the International Astronomical Union
- Publication Type :
- Academic Journal
- Accession number :
- 164220769
- Full Text :
- https://doi.org/10.1017/S1743921322003982