The Star Formation Law as a Function of Galactic Properties

Details The Star Formation Law as a Function of Galactic Properties The Star Formation Law as a Function of Galactic Properties

Jun 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..390..161k&link_type=abstract

Pathways Through an Eclectic Universe ASP Conference Series, Vol. 390, proceedings of the conference held 23-27 April, 2007 at S

Astronomy and Astrophysics

Astronomy

Scientific paper

The relation between molecular gas quantity and star formation rate, known as the Schmidt law, is tested for its dependency on galactic morphology, with an emphasis on the presence of bars. The galaxy sample is based on a survey of the 12CO(J=1→0) emission in nearby galaxies completed at the Nobeyama Radio Observatory 45 m telescope, combined with previous surveys with similar resolution. These data were compared to star formation rates derived using internal extinction corrected Hα. The slope of the Schmidt law is found to vary considerably with sample distance, from 0.7 to 1.4. The Schmidt law is categorized according to the presence of bars. Consequently, we find that barred galaxies occupy the denser regime of the Schmidt law, but with no apparent difference in the star formation efficiency, indicating that bars stimulate central inflow of gas, but that star formation still occurs according to a common star formation law as with non-barred galaxies.

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