Statistics of QSO lensing and cosmological parameters

Masashi Chiba, Toshifumi Futamase

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Statistics of gravitational lensing of QSOs by intervening galaxies provides a powerful tool to set constraints on cosmological parameters. In particular, lensing statistics are sensitive indicators of a nonvanishing cosmological constant. We review the present status of the subject and recent progress of theoretical works. Taking into account the current knowledge of early-type galaxies that effectively work as lenses, we present plausible lens models for calculating lensing statistics and give a detailed discussion on the possible value of a cosmological constant to reproduce the observed frequency of lensed QSOs and their image-separation distribution.

Original languageEnglish
Pages (from-to)115-135
Number of pages21
JournalProgress of Theoretical Physics Supplement
Issue number133
DOIs
Publication statusPublished - 1999 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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