We present analysis on three intervening H i-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 (zabs = 0.003 46), SBS 1122 + 594 (zabs = 0.004 02), and RXJ 1230.8 + 0115 (zabs = 0.005 74). The ionization models are consistent with the origin of metal lines and H i from a cool and diffuse photoionized gas phase with T ≲ 4 × 104 K and nH ≲ 5 × 10-4 cm-3. The three absorbers have 89, 51, and 17 galaxies detected within 1 Mpc and |Δv| < 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 H i has enabled us to confirm the presence of cool, diffuse gas possibly enriched by outflows, and tidal interactions in environments with significant galaxy density.
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science