Gas dynamics and star formation in disk galaxies - from CO observations of early-type spiral galaxies with central starbursts

Details Gas dynamics and star formation in disk galaxies - from CO observations of early-type spiral galaxies with central starbursts Gas dynamics and star formation in disk galaxies - from CO observations of early-type spiral galaxies with central starbursts

Feb 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006asthe..99...85k&link_type=abstract

The Astronomical Herald (ISSN 0374-2466), Vol. 99, No. 2, p. 85 - 91 (2006)

Astronomy and Astrophysics

Astronomy

Disk Galaxies: Star Formation

Scientific paper

We discuss if the large-scale gravitational instability of galactic disks (Toomre Q-type instability) is relevant to star formation in disk galaxies. Based on our CO observations of early-type disk galaxies with central starbursts, we conclude that the Q instability indicates neither star formation nor molecular cloud formation. We clarify the problems in the past arguments for star formation due to the Q instability. We explore an alternative star formation mechanism. Cloud-cloud collision might account for star formation.

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