Gas, Stars, and Star Formation in Extreme Outer Disks of Dwarf Galaxies

Details Gas, Stars, and Star Formation in Extreme Outer Disks of Dwarf Galaxies Gas, Stars, and Star Formation in Extreme Outer Disks of Dwarf Galaxies

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21714714h&link_type=abstract

American Astronomical Society, AAS Meeting #217, #147.14; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

We compare deep optical images, deep ultraviolet images obtained with GALEX, and HI interferometric maps of five dwarf irregular galaxies in order to examine star formation in their outer disks. The V-band surface photometry, which extends to 29-30 mag/arcsec-squared, averages the star formation activity over the past Gyr for on-going star formation. The GALEX ultraviolet data provides information on star formation over the past 200 Myrs. The HI maps and cubes yield information on the gas surface densities and kinematics. We deconvolve the ordered rotation from non-ordered motions of the gas and compare with the stellar populations.
This research has been funded by the Lowell Research Fund and by NASA/GALEX grant NNX08AL66G.

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