Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21714708s&link_type=abstract
American Astronomical Society, AAS Meeting #217, #147.08; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
The interplay between star formation and the interstellar medium (ISM) is critical for shaping the baryonic component of galaxies. We probe the present-day structure of the ISM through neutral hydrogen (HI) observations of nearby dwarf galaxies from the Very Large Array ACS Nearby Galaxy Survey Treasury (VLA-ANGST) Project, complemented by extensive HST imaging from ANGST that allows us to accurately constrain the recent star formation histories of these galaxies on spatial scales of 100 pc. We find a clear lower limit to the HI velocity dispersion in every sample galaxy. We explore the possible causes of this limit by examining its properties at varying surface densities as well as any potential correlation with star formation in the last 500 Myr.
Dalcanton Julianne J.
Ott Jorgen
Stilp Adrienne
Warren Steve
Weisz Daniel
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