Spectroscopy of the double quasars Q1343+266A, B: The relationship between galaxies and quasi-stellar object C IV absorption lines

We present spectra of QSOs 1343+266 A B, covering Ly-beta to C~IV emission at 2\AA~resolution, and find further evidence that this system is not gravitationally lensed. We see, however, a large number of Ly-alpha and some C~IV absorption features common to both spectra. The frequency of C~IV lines in common indicates that these absorbers have a radius close to the sightline separation, $39~h^{-1}$kpc ($q_o=0.5$), implying a spatial number density of these absorbers the same as current day $L>0.3L_*$ galaxies. Furthermore, the velocity mismatch for C~IV systems indicates absorber masses in the range $10^{11}~M_{\odot} < M < 10^{12}~M_{\odot}$. These results confirm that typical galaxies cause QSO C~IV-line absorption. A complete line-list of metal-lines and the Ly-alpha forest is presentedComment: (8 pages, Accepted by Ap. J Letters) 929