Star Formation in the Outskirts of Disk Galaxies

Details Star Formation in the Outskirts of Disk Galaxies Star Formation in the Outskirts of Disk Galaxies

Jul 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002ap%26ss.281..119f&link_type=abstract

Astrophysics and Space Science, v. 281, Issue 1, p. 119-122 (2002).

Astronomy and Astrophysics

Astrophysics

3

Disk Galaxies, Star Formation, Stellar Populations

Scientific paper

The far outer regions of galactic disks allow an important probe of both star formation and galaxy formation. I discuss how observations of HII regions in these low gas density, low metallicity environments can shed light on the physical processes which drive galactic star formation. The history of past star formation at large radii, as traced by observations of old and intermediate-age stars, constrains the epoch at which the highest angular momentum regions of disks were in place; first results for the M31 disk suggest this occured a significant (≳ 8 Gyr) time ago.

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