2024-03-29T10:11:33Z
https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:00015868
2022-12-14T04:01:46Z
1544:1545
The Physical Conditions of the Intrinsic N V Narrow Absorption Line Systems of Three Quasars
Wu, Jian
Charlton, Jane C.
Misawa, Toru
Eracleous, Michael
Ganguly, Rajib
Copyright (c) 2010 The American Astronomical Society
quasars: absorption lines
quasars: individual (HE0130-4021, Q1009+2956, HS1700+6416)
We employ detailed photoionization models to infer the physical conditions of intrinsic narrow absorption line systems found in high-resolution spectra of three quasars at z = 2.6-3.0. We focus on a family of intrinsic absorbers characterized by N V lines that are strong relative to the Lyα lines. The inferred physical conditions are similar for the three intrinsic N V absorbers, with metallicities greater than 10 times the solar value (assuming a solar abundance pattern), and with high ionization parameters (log U ~ 0). Thus, we conclude that the unusual strength of the N V lines results from a combination of partial coverage, a high ionization state, and high metallicity. We consider whether dilution of the absorption lines by flux from the broad emission line region can lead us to overestimate the metallicities and we find that this is an unlikely possibility. The high abundances that we infer are not surprising in the context of scenarios in which metal enrichment takes place very early on in massive galaxies. We estimate that the mass outflow rate in the absorbing gas (which is likely to have a filamentary structure) is less than a few M_ yr−1 under the most optimistic assumptions, although it may be embedded in a much hotter, more massive outflow.
Article
The Astrophysical Journal. 722(2):997-1012 (2010)
IOP PUBLISHING LTD
2010-10-20
eng
journal article
VoR
http://hdl.handle.net/10091/10715
https://soar-ir.repo.nii.ac.jp/records/15868
https://doi.org/10.1088/0004-637X/722/2/997
10.1088/0004-637X/722/2/997
0004-637X
AA00553253
The Astrophysical Journal
722
2
997
1012
https://soar-ir.repo.nii.ac.jp/record/15868/files/PHYSICAL_CONDITIONS_INTRINSIC.pdf
application/pdf
1.2 MB
2015-09-28