Low Metallicity Blue Compact Galaxies Discovered By WISE

Details Low Metallicity Blue Compact Galaxies Discovered By WISE Low Metallicity Blue Compact Galaxies Discovered By WISE

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21733311t&link_type=abstract

American Astronomical Society, AAS Meeting #217, #333.11; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

We present newly discovered low metallicity blue compact galaxies (BCGs) from WISE all sky survey. Between 3.4 and 12 microns, these galaxies share similar WISE colors to red ULIRGs and obscured AGNs. However, they are significantly brighter at optical wavelengths. Our preliminary analysis suggests that about 40% of WISE objects using these criteria are BCGs or their higher luminosity analogs. Keck optical spectroscopy reveals 1/10 Solar or lower metallicities (log[O/H] + 12) in these systems. Future comprehensive follow-up plans of WISE BCG candidates are discussed. These low metallicity, mid-IR bright BCGs will be a unique sample for studying dust grain formation in low metallicity environments, and will help us to understand the thermal dust emission of high-redshift, starburst galaxies.

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