Other
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21545719m&link_type=abstract
American Astronomical Society, AAS Meeting #215, #457.19; Bulletin of the American Astronomical Society, Vol. 42, p.482
Other
Scientific paper
We examine the process of "feedback" in the interstellar medium (ISM) of the M81 group dwarf irregular galaxy DDO 165. VLA HI imaging reveals a wealth of structure in the ISM, including a large central hole ( 2.2 x 1.1 kpc), numerous smaller holes and shells, high-velocity gas throughout the disk, and a kinematically distinct northern region (Most et al. 2009). We extract spatially resolved recent star formation histories from HST imaging of this system, with particular focus on the regions showing these "feedback" signatures. Using improved estimates of the mass surface density, the disk scale height, and the HI volume density, we calculate that the energetics of these star formation events (some of which are temporally extended) are sufficient to create the observed structures in the ISM of DDO 165. As recently found for other systems, "feedback" plays an important role in the evolution of low-mass galaxies.
Cannon John M.
Cook Damon
Dolphin Andrew E.
Kennicutt Robert C. Jr.
Lee Julian
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