A straight gravitational image in Abell 2390 - A striking case of lensing by a cluster of galaxies

Details A straight gravitational image in Abell 2390 - A striking case of lensing by a cluster of galaxies A straight gravitational image in Abell 2390 - A striking case of lensing by a cluster of galaxies

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...366..405p&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 366, Jan. 10, 1991, p. 405-411. Research supported by CNRS and CAICYT.

Astronomy and Astrophysics

Astrophysics

88

Galactic Clusters, Gravitational Lenses, Astronomical Photometry, Astronomical Spectroscopy, Emission Spectra, Galactic Evolution, Luminosity

Scientific paper

Photometry and spectroscopy are presented for a very linear arclike object found in the center of the rich cluster of galaxies Abell 2390 (z = 0.231). The main feature in its spectrum is an emission line at 7130 A that exists all along the arc. The identification of this emission line as Forbidden O II (3727 A) leads to a redshift of 0.913 for the structure. This is the third arc candidate confirmed spectroscopically as a gravitationally lensed background galaxy.

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