1. Unusually High Metallicity Host Of The Dark LGRB 051022
- Author
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J. F. Graham, A. S. Fruchter, L. J. Kewley, E. M. Levesque, A. J. Levan, N. R. Tanvir, D. E. Reichart, M. Nysewander, Charles Meegan, Chryssa Kouveliotou, and Neil Gehrels
- Subjects
Physics ,Absolute magnitude ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Metallicity ,Dark matter ,FOS: Physical sciences ,Astrophysics ,B band ,Gamma-ray burst ,Spectroscopy ,Galaxy cluster ,Galaxy ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We present spectroscopy of the host of GRB 051022 with GMOS nod and shuffle on Gemini South and NIRSPEC on Keck II. We determine 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 -21.5 and has the spectrum of a rapidly star-forming galaxy. Our work raises the question of whether other dark burst hosts will show high metallicities., Conference procedings for The Sixth Huntsville Gamma-Ray Burst Symposium 2008 October 20-23 (3 pages, 2 figures)
- Published
- 2009
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