Other
Scientific paper
May 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...268l..57s&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 268, May 15, 1983, p. L57-L61.
Other
69
Absorption Spectra, Quasars, Red Shift, Emission Spectra, Galactic Clusters, Spectrum Analysis
Scientific paper
Common metal absorption systems have been found in the spectra of the QSOs Q0307-195A and B (separation 58 arcsec) at z = 2.122, the emission redshift of the latter; the projected separation is 378/h kpc, and the absorption redshifts differ from each other by only 77 + or - 14 km/s. This result, and that found previously for the pair Q0028+003/Q0029+003, strongly suggest the presence of very large (Mpc-diameter) gaseous halos or disks surrounding QSOs. Another pair of common metal absorption systems has also been found at a considerably lower redshift, Z(abs) = 2.034. The redshift difference in this case is 297 + or - 14 km/s and the projected separation 376/h kpc; the absorption may be due to one or possibly two foreground galaxies. A marginal tendency has been found among the remaining Lyman-alpha lines in the two spectra to correlate with each other at small velocity separations (not greater then approximately 500 km/s).
Robertson Gordon J.
Shaver Peter A.
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