AAS 200th meeting, Albuquerque, NM, June 2002
Session 43. Galaxies
Display, Tuesday, June 4, 2002, 10:00am-6:30pm, SW Exhibit Hall

[Previous] | [Session 43] | [Next]

[43.01] Calibrating [\ion{O}{2}]/H\alpha as a Star Formation Indicator

J. Moustakas, R.C. Kennicutt (University of Arizona)

Based on truly integrated spectrophotometry of a sample of ~300 galaxies we derive a new calibration of the [\ion{O}{2}]/H\alpha spectral ratio as a star formation indicator . Our study extends the analysis of Kennicutt (1992) and Jansen et.~al. (2000) on the [\ion{O}{2}]/H\alpha ratio in morphologically normal galaxies to include a majority fraction of starburst and infrared luminous galaxies. Our results have direct application for deriving star formation rates from observations of [\ion{O}{2}] in high-redshift galaxies. Our broad spectral coverage (\lambda3600-7000~Å) and insensitivity to aperture effects enable us to study the spatially integrated effects of excitation, metallicity, and extinction on [\ion{O}{2}]/H\alpha as a star-formation indicator. This research was funded by grants NSF AST-9900789 and NASA NAG5-8426.

[Previous] | [Session 43] | [Next]

Bulletin of the American Astronomical Society, 34
© 2002. The American Astronomical Soceity.