Statistical analysis of emission and absorption lines of quasars. II. An analysis of 6761 quasars

We made a further analysis of 6761 quasars in the Hewitt-Burbidge 1993 catalogue. The emission redshift range is between 0.0 and 4.9. The results show that, on average, association between absorbing matter and quasar is found in 43% of the cases, but the percentage varies wildly in different emissio...

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Bibliographic Details
Published inChinese astronomy and astrophysics Vol. 23; no. 1; pp. 17 - 21
Main Authors Gong, Shu-mo, Xia, Chang-li
Format Journal Article
LanguageEnglish
Published Elsevier B.V 1999
Subjects
absorption lines
emission lines
quasars
statistical analysis
absorption lines
statistical analysis
emission lines
quasars
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Summary:We made a further analysis of 6761 quasars in the Hewitt-Burbidge 1993 catalogue. The emission redshift range is between 0.0 and 4.9. The results show that, on average, association between absorbing matter and quasar is found in 43% of the cases, but the percentage varies wildly in different emission redshift intervals, from 100% in the intervals 0.2–0.3 and 3.6–3.7 to 0% in the interval 0.7–0.8. The interval at z em = 2.0 is outstanding: it is where the numbers of quasars with emission redshifts, with absorption redshifts, with 3 or more absorption lines, with 6 or more absorption lines, all peak.
ISSN:0275-1062
1879-128X
DOI:10.1016/S0275-1062(99)00021-1