Low- and high-ionization absorption properties of MgII absorption-selectedgalaxies at intermediate redshifts. I. General properties

We present extensive metal-line absorption properties for 45 absorption sys tems that were selected by their Mg II absorption at redshifts between 0.4 and 1.4. For each system the properties of several chemical species are det ermined, including a wide range of ionization conditions. In the optical, t he absorption systems have been observed at similar to6 km s(-1) resolution with HIRES/Keck, which covered Mg II, several Fe II transitions, Mg I, and in some cases (depending upon redshift) Ca rr, Ti II, Mn II, and Al In. Ul traviolet, lower resolution (similar to 230 km s(-1)) Faint Object Spectrog raph data (1600-3275 Angstrom) were obtained from the Hubble Space Telescop e archive. These spectra covered Al II, Al III, Si II, Si III, Si Iv, C rr, C III, C Iv, N V, O VI, and several Lyman series transitions, with coverag e dependent upon the absorption system redshift. From these data, we infer that Mg II-absorbing galaxies at intermediate redshifts have multiphase gas eous structures.