Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 422, Issue 2, Pages 1700-1708Publisher
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2012.20746.x
Keywords
line: profiles; quasars: absorption lines; quasars: individual: Q2206-199
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Funding
- Leverhulme Trust
- Kavli Foundation
- UK Science and Technology Facilities Council
- Hawaii the US National Science Foundation
- Australian Research Council [DP0877998]
- NSF [AST-1109452]
- Science and Technology Facilities Council [ST/H00243X/1, ST/J000647/1, ST/H004912/1, ST/J001538/1] Funding Source: researchfish
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [1109452, 1102683] Funding Source: National Science Foundation
- STFC [ST/J000647/1, ST/H004912/1, ST/J001538/1] Funding Source: UKRI
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By comparing the widths of absorption lines from O I, Si II and Fe II in the redshift z(abs) = 2.076 single-component damped Ly alpha system in the spectrum of Q2206-199 we establish that these absorption lines arise in warm neutral medium (WNM) gas at similar to 12 000 +/- 3000 K. This is consistent with thermal equilibrium model estimates of similar to 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.
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