Dust and Star Formation in Nearby Dwarf Galaxies

Details Dust and Star Formation in Nearby Dwarf Galaxies Dust and Star Formation in Nearby Dwarf Galaxies

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009eimw.confe..69w&link_type=abstract

"The Evolving ISM in the Milky Way and Nearby Galaxies, The Fourth Spitzer Science Center Conference, Proceedings of the confere

Computer Science

Stars: Formation, Galaxies : Dwarf, Galaxies : Irregular, Galaxies : Local Group, Infrared : Galaxies, Ultraviolet : Galaxies, Galaxies: Ism

Scientific paper

We present FIR measurements from the MIPS instrument aboard the Spitzer Space Telescope of the dust emission from 13 dwarf galaxies that have distances less than 2 Mpc, span metallicities from 5-28% of the solar oxygen abundance, and with SFRs ranging from 10-4 to 10-1 M&sun; yr-1. We compare the "obscured" star formation traced by the FIR images with measurements of the "un-obscured" star formation traced by UV images from the Galaxy Evolution Explorer (GALEX) and ground-based Hα fluxes. We find that the ratio of FIR to FUV SFR decreases with oxygen abundance. The Hα SFRs are consistent with both the far-infrared and UV values for the galaxies with the highest star formation rates, but are systematically lower than both of these values at the lowest star formation rates and metallicities.

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