The Star Formation History of Late-type Galaxies

Details The Star Formation History of Late-type Galaxies The Star Formation History of Late-type Galaxies

Jun 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..390..242j&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

We investigate the dominant mode of star formation in late-type galaxies using an analysis of the distribution of star formation timescales (stellar masses/star formation rates) for 117 Im and Sm galaxies. We find that these galaxies could have produced their stellar mass by extrapolation of their current rate of growth over a Hubble time. No quiescent galaxies are found, supporting continuous rather than ``bursty'' modes of star formation. The spatial distributions of new and old populations are mutually consistent in these late-type galaxies and the optical-to-near-infrared colors are as expected from continuous star formation activity.

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