Other
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21910606z&link_type=abstract
American Astronomical Society, AAS Meeting #219, #106.06
Other
Scientific paper
The picture of how stellar disks form and grow in dwarf irregular galaxies is far from clear. We initiated a study of the relationship between the star-forming disk, the "backbone" old stellar disk, and the HI gas disk for the dwarf irregular galaxies included in the LITTLE THINGS survey. The data that we used include images from GALEX FUV/NUV, ground-based UBV, narrow-band H-alpha, near-IR J, and Spitzer 3.6 micron, as well as VLA HI surface density maps. In this talk, first, I will present the radial variations of the azimuthal averages of recent star formation and stellar mass surface density for 34 of the LITTLE THINGS galaxies, and then explore: 1) the radial evolution of the star-forming disk, and 2) the relationship between the surface density of star formation and stellar mass. Secondly, for a subsample of 10 face-on LITTLE THINGS galaxies, I will present the power spectra for the azimuthal scans of the FUV, B, V, and HI maps. I will discuss to what degree, and on what scales, recent star formation, the old stellar disk, and gas distribution correspond with each other as a function of radius.
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