Studies of C IV associated absorption systems of QSOs (II) statistical studies (1)

Details Studies of C IV associated absorption systems of QSOs (II) statistical studies (1) Studies of C IV associated absorption systems of QSOs (II) statistical studies (1)

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994cha%26a..18...29l&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 18, Issue 1, p. 29-37.

Astronomy and Astrophysics

Astrophysics

1

Qsos, Absorption Lines

Scientific paper

Based on the unbiased homogeneous CIV absorption line sample constructed in paper(I), we have carried out a statistical test and analysis. The results show that there is an apparent excess of associated absorption systems (defined as those with zabs<~zem, as Weymann et al. reported. This excess of associated CIV systems exists both in radio-loud and radio-quiet QSOs. But the excess seems to be dependent on the redshift. This is most likely a result of evolution of the interaction of QSOs, especially radio-loud QSOs, with their environment. Larger samples of high-redshift, radio-loud QSOs are necessary to confirm our result.

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