The Unusually High Metallicity Host Of The Dark LGRB 051022

Details The Unusually High Metallicity Host Of The Dark LGRB 051022 The Unusually High Metallicity Host Of The Dark LGRB 051022

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21347602g&link_type=abstract

American Astronomical Society, AAS Meeting #213, #476.02; Bulletin of the American Astronomical Society, Vol. 41, p.441

Astronomy and Astrophysics

Astronomy

Scientific paper

We present spectroscopy of the host of GRB 051022 with GMOS nod and shuffle on Gemini South and NIRSPEC on Keck II. We calculate a metallicity for the host of log(O/H)+12 = 8.77 using the R23 method (Kobulnicky & Kewley 2004 scale) making this the highest metallicity long burst host yet observed. The galaxy itself is unusually luminous for a LGRB host with a rest frame B band absolute magnitude of about -21.6 and has the spectrum of a rapidly star-forming object. Interestingly, the unusually high metallicity and this being a dark burst may not be unrelated.

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