A SUPER-DAMPED Ly{alpha} QUASI-STELLAR OBJECT ABSORBER AT z = 2.2
- Department of Physics and Astronomy, University of South Carolina, Columbia, SC 29208 (United States)
- Department of Astronomy, University of Massachusetts, Amherst, MA 01003 (United States)
- Laboratoire d'Astrophysique de Marseille, OAMP, Universite Aix-Marseille, 13388 Marseille Cedex 13 (France)
- Department of Astronomy and Astrophysics, University of Chicago, Chicago, IL 60637 (United States)
- Inter-University Center for Astronomy and Astrophysics, Pune 411007 (India)
We report the discovery of a 'super-damped' Ly{alpha} absorber at z{sub abs} = 2.2068 toward quasi-stellar object (QSO) Q1135-0010 in the Sloan Digital Sky Survey (SDSS) and follow-up Very Large Telescope (VLT) UVES spectroscopy. A Voigt profile fit to the damped Ly{alpha} (DLA) line indicates log N{sub Hi}= 22.05 {+-} 0.1. This is the second QSO DLA discovered to date with such high N{sub Hi}. We derive element abundances [Si/H] = -1.10 {+-} 0.10, [Zn/H] = -1.06 {+-} 0.10, [Cr/H] = -1.55 {+-} 0.10, [Ni/H] = -1.60 {+-} 0.10, [Fe/H] = -1.76 {+-} 0.10, [Ti/H] = -1.69 {+-} 0.11, [P/H] = -0.93 {+-} 0.23, and [Cu/H] = -0.75 {+-} 0.14. Our data indicate detection of Ly{alpha} emission in the DLA trough, implying a star formation rate (SFR) of {approx}10 M{sub Sun} yr{sup -1} in the absence of dust attenuation. C II* {lambda}1336 absorption is also detected, suggesting SFR surface density -2
- OSTI ID:
- 22020358
- Journal Information:
- Astrophysical Journal, Vol. 749, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
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