Evidence for a massive, dark gravitational lensing object in Q2345 + 007

Details Evidence for a massive, dark gravitational lensing object in Q2345 + 007 Evidence for a massive, dark gravitational lensing object in Q2345 + 007

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...375l..41d&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 375, July 10, 1991, p. L41-L44. Research supported by Texas Advan

Astronomy and Astrophysics

Astrophysics

8

Dark Matter, Gravitational Lenses, Quasars, Absorption Spectra, Astronomical Spectroscopy, Luminosity, Lyman Alpha Radiation

Scientific paper

The pattern of Ly-alpha forest absorption lines noted by the present analysis of narrow absorption line spectra of a double quasar is taken as evidence for a quasar that is gravitationally lensed. If the lensing object's z value is of the order of 1.49, then a low-luminosity lensing mass of about 10 to the 13th solar masses is implied. If the quasar is not lensed, the Ly-alpha clouds are larger by a factor of about 6.5. Observational tests capable of verifying the presence of a massive, dark, lensing object are suggested.

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