Estimated probability of the partial coverage of QSOs by intervening H2-clouds at formation of QSO absorption-line spectra

15th Russian Youth Conference on Physics and Astronomy

物理学;天文学

Ofengeim, D.D.^1 ; Ivanchik, A.V.^1,2 ; Kaminker, A.D.^1,2 ; Balashev, S.A.^2

St.-Petersburg State Polytechnical University, Politekhnicheskaya 29, 195251 St.-Petersburg, Russia^1

Ioffe Physical-Technical Institute, Politekhnicheskaya 26, 194021 St.-Petersburg, Russia^2

关键词: Absorption lines;    Absorption system;    Broad line region;    Interstellar clouds;    Partial coverage;    Physical parameters;    Systematic searches;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/461/1/012046/pdf
DOI  :  10.1088/1742-6596/461/1/012046

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

We have estimated the probability of a partial coverage of QSO broad-line regions by intervening H2-clouds. This effect has been revealed by an analysis of H2absorption systems in QSO spectra [1, 2]. Accounting of the effect may change significantly physical parameters of interstellar clouds derived from the spectral analysis [2]. We show that the probability of incomplete coverage turns out to be not lower than about 8%. Actually, a frequency of the effect revealing may occur essentially higher than this quantity, encouraging us in further systematic searches of the incomplete coverage in the H2absorption QSO spectra.