C IV absorbers tracing cool gas in dense galaxy group/cluster environments

We present analysis on three intervening HI-C IV absorption systems tracing gas within galaxy group/cluster environments, identified in the HST/COS far-UV spectra of the background quasars PG 1148 + 549 (z(abs) = 0.003 46), SBS 1122 + 594 (z(abs) = 0.004 02), and RXJ 1230.8 + 0115 (z(abs) = 0.005 74). The ionization models are consistent with the origin of metal lines and HI from a cool and diffuse photoionized gas phase with T less than or similar to 4 x 10(4) K and H-n less than or similar to 5 x 10(-4) cm(-3). The three absorbers have 89, 51, and 17 galaxies detected within 1Mpc and vertical bar Delta upsilon vertical bar < 600 km s(-1). The RXJ 1230.8 + 0115 sightline traces the outskirt regions of the Virgo cluster where the absorber is found to have supersolar metallicity. The detection of metal lines along with HI has enabled us to confirm the presence of cool, diffuse gas possibly enriched by outflows, and tidal interactions in environments with significant galaxy density.