Skip to content.

The Carnegie Observatories

Contributing to basic research in astronomy since 1904, as a part of the Carnegie Institution of Washington


The Resolved Star Formation Law in THINGS

Frank Bigiel
(MPI Heidelberg)


I will present results from THINGS ("The HI Nearby Galaxy Survey"). The survey was carried out at the VLA and provides the currently best sensitivity and highest resolution HI survey data available. It covers 34 nearby galaxies and spans a wide range in galaxy parameter space, e.g. in HI mass, metallicity and star formation activity. I will present a detailed pixel-by-pixel study of the star formation law on 750 pc resolution for 19 THINGS galaxies, spirals and dwarfs, using ancillary CO, Spitzer 24 micron and GALEX UV data. I will show that a Schmidt law with power law index N = 1.0 ± 0.2 relates star formation surface density and molecular gas surface density and that the ratio of HI to H2 is a strong function of radius and thus environment in a galaxy. I will also present results regarding testing different star formation recipes in THINGS.

Contact/Host: Barry Madore