Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21520204r&link_type=abstract
American Astronomical Society, AAS Meeting #215, #202.04; Bulletin of the American Astronomical Society, Vol. 42, p.294
Astronomy and Astrophysics
Astronomy
Scientific paper
The processes that lead to star formation on galactic scales are poorly understood even in the simplest systems in the universe, dwarf galaxies. At best we have incomplete knowledge of certain processes in certain environments. Here we present preliminary HI images of a small subset of galaxies from the LITTLE THINGS Survey: a complete dataset on a sample of 41 dIm galaxies chosen to span a range of luminosities. We are tracing their stellar populations, gas content, dynamics, and star formation indicators. We were granted over 300 hours of time with the VLA in B, C, and D array configurations to obtain deep HI-line maps of the sample with high angular and velocity resolution to combine with our optical, UV, and IR data to answer the following questions: 1) What regulates cloud/star formation in tiny galaxies? 2) How is star formation occurring in the outer parts of dwarf galaxies, where the gas is gravitationally stable? 3) What happens to the star formation process at breaks in the exponential stellar light profiles? 4) And, what is going on with Blue Compact Dwarfs? More information can be found at http://www.lowell.edu/users/dah/littlethings/.
We gratefully acknowledge funding for this research from the National Science Foundation with grants to DAH (AST-0707563) and CES (AST-0707468).
The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.
Little Things Team
Rupen Michael P.
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