Common absorption systems in the spectra of the QSO pair Q0307-195A, B
1983; IOP Publishing; Volume: 268; Linguagem: Inglês
10.1086/184029
ISSN1538-4357
AutoresP. A. Shaver, J. G. Robertson,
Tópico(s)Galaxies: Formation, Evolution, Phenomena
Resumoview Abstract Citations (71) References (5) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Common absorption systems in the spectra of the QSO pair Q 0307-195 A, B. Shaver, P. A. ; Robertson, J. G. Abstract 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). Publication: The Astrophysical Journal Pub Date: May 1983 DOI: 10.1086/184029 Bibcode: 1983ApJ...268L..57S Keywords: Absorption Spectra; Quasars; Red Shift; Emission Spectra; Galactic Clusters; Spectrum Analysis; Astrophysics full text sources ADS | data products NED (15) SIMBAD (5)
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