Statistics of QSO lensing and cosmological parameters

Masashi Chiba, Toshifumi Futamase

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


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
Publication statusPublished - 1999


Dive into the research topics of 'Statistics of QSO lensing and cosmological parameters'. Together they form a unique fingerprint.

Cite this