MG II absorption by previously known galaxies at Z of about 0.5

Details MG II absorption by previously known galaxies at Z of about 0.5 MG II absorption by previously known galaxies at Z of about 0.5

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...396...20b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 396, no. 1, Sept. 1, 1992, p. 20-34.

Statistics

38

Absorption Spectra, Galactic Evolution, Line Spectra, Magnesium, Metallicity, Quasars, Disk Galaxies, Galactic Clusters, Ion Charge, Luminosity, Red Shift

Scientific paper

Multiple Mirror Telescope spectra of nine QSOs were obtained in order to search for Mg II 2796, 2803 wavelength absorption from intervening galaxies with previously determined redshifts between 0.2 and 0.7. Two Mg II systems with the redshift of known galaxies, including one associated with a cluster of galaxies at z = 0.362 have been detected. From lack of detectable Mg II absorption for a large number of other galaxies, it is judged that galaxies that do absorb must have an effective cross section for absorption at least twice as large in radius as previously thought, in order to account for Mg II absorber statistics. Contrary to previous work, the galaxies with detectable absorption have the same distribution of absolute luminosities as galaxies which show no absorption.

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