Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21741703b&link_type=abstract
American Astronomical Society, AAS Meeting #217, #417.03; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
We generate star formation histories representative of the low present and past star formation rates in the outer disks of spiral galaxies. The model star formation histories consist of episodic sampling of exponentially declining star formation rates. We study the effects of these star formation histories on UV, optical and NIR colors using stellar population models from Bruzual and Charlot (2003). We find significant dispersion in the UV colors, and negligible dispersion in both the optical and NIR colors. We compare our Monte Carlo simulations to recent observations of the outer disks of nearby spiral galaxies. Our results indicate that the large dispersion in UV colors in outer disks may be a result of low star formation frequency.
Barnes Kate L.
Dowell Jayce D.
van Zee Liese
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