The kinetic temperature in a damped Lyman alpha absorption system in Q2206-199: an example of the warm neutral medium

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The kinetic temperature in a damped Lyman alpha absorption system in Q2206-199: an example of the warm neutral medium

Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/219742

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Title: The kinetic temperature in a damped Lyman alpha absorption system in Q2206-199: an example of the warm neutral medium
Author(s): Carswell, R. F.; Becker, G. D.; Jorgenson, R. A.; Murphy, M. T.; Wolfe, A. M.
Abstract: By comparing the widths of absorption lines from O i, Si ii and Fe ii in the redshift zabs= 2.076 single-component damped Lyα system in the spectrum of Q2206−199 we establish that these absorption lines arise in warm neutral medium (WNM) gas at ∼12 000 ± 3000 K. This is consistent with thermal equilibrium model estimates of ∼8000 K for the WNM in galaxies, but not with the presence of a significant cold component. It is also consistent with, but not required by, the absence of C ii fine structure absorption in this system. Some possible implications concerning abundance estimates in narrow-line WNM absorbers are discussed.
Publication type: Journal article
Research centre: Swinburne University of Technology. Faculty of Information and Communication Technologies. Centre for Astrophysics and Supercomputing
Source: Monthly Notices of the Royal Astronomical Society, Vol. 422, no. 2 (May 2012), pp. 1700-1708
Publication year: 2012
FOR Code(s): 0201 Astronomical and Space Sciences
Keyword(s): Absorption lines; Q2206-199; Quasars
Publisher: Wiley-Blackwell
ISSN: 0035-8711
Publisher URL: http://dx.doi.org/10.1111/j.1365-2966.2012.20746.x
Research Projects: Galaxy formation and femtosecond frequency combs, Australian Research Council grant number DP0877998
Peer reviewed