Star Formation and the Tully-Fisher Relation

Details Star Formation and the Tully-Fisher Relation Star Formation and the Tully-Fisher Relation

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop50243m&link_type=abstract

Spitzer Proposal ID #50243

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Scientific paper

We propose to investigate the Tully-Fisher (TF) relation in archival Spitzer data. The slope of the TF relation, which is the most fundamental relationship reflecting galaxy formation scenarios, increases from B to K band passes, and the scatter around the relation decreases over the same range. We seek to determine if this trend continues, or if it saturates at a value set by an intrinsic relation between mass and rotation velocity. Indeed, this intrinsic 'baryonic' Tully-Fisher relation provides the one of the most direct test of galaxy formation scenarios. Our target sample possesses extensive supporting data, including BVJK photometry (at a minimum; other bands and Halpha are often available) and high quality extended HI velocity fields. We will use these data to measure the impact of extinction and star formation on the intrinsic TF relation, and to test the efficacy of competing estimators of the stellar mass. This will produce an empirical calibration of the Spitzer Tully-Fisher relation and insight into its physical significance.

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