Constraint on the cosmological constant by Einstein ring system 0047-2808

Toshifumi Futamase, Takashi Hamana

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


We point out that the first optical Einstein ring system 0047-2808 may be used to set a unique restriction on the range of values of the cosmological constant. The existing data indicate the value Ωλ < 1.2, which is consistent with the standard big bang scenario. The constraint should be improved significantly by future detailed observations of the velocity dispersion of the lensing galaxy with large telescopes such as SUBARU.

Original languageEnglish
Pages (from-to)1037-1041
Number of pages5
JournalProgress of Theoretical Physics
Issue number5
Publication statusPublished - 1999 Nov
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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