The Physical Conditions of the Intrinsic N V Narrow Absorption Line Systems of Three Quasars
スポンサーリンク
概要
- 論文の詳細を見る
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.
- 2010-10-20
論文 | ランダム
- 女王の知られていないアミメアリの生殖と産卵(発生学)
- カブトガニ胚に対するアザセリンの影響(発生学)
- 上皮小体嚢胞(ABCC欄)
- 23-27 Kinetics of Cu, Pb and Zn adsorption by soils differed in cation exchanger composition
- 内分泌学的検査法--悪性腫瘍における高カルシウム血症 (悪性腫瘍の臨床生化学免疫学的検査法(第21回日本臨床病理学会総会-2-))