SDSS J143726.97-012034.1 , the SIMBAD biblio

We describe the survey for galaxies in the fields surrounding nine sightlines to far-UV bright, z ∼ 1 quasars that define the COS Absorption Survey of Baryon Harbors (CASBaH) program. The photometry and spectroscopy that comprise the data set come from a mixture of public surveys (SDSS, DECaLS) and our dedicated efforts on private facilities (Keck, MMT, LBT). We report the redshifts and stellar masses for 5902 galaxies within ≃10 comoving-Mpc of the sightlines with a median of {bar}z=0.28 and {bar}M_*~10^10.1M_☉. This data set, publicly available as the CASBaH SPECDB, forms the basis of several recent and ongoing CASBaH analyses. Here, we perform a clustering analysis of the galaxy sample with itself (auto-correlation) and against the set of O VI absorption systems (cross-correlation) discovered in the CASBaH quasar spectra with column densities N(O⁺⁵)≥ 10^13.5cm^–2. For each, we describe the measured clustering signal with a power-law correlation function ξ(r)=(r/r₀)^-γ^ and find that (r₀,γ)=(5.48±0.07h₁₀₀^–1Mpc,1.33±0.04) for the auto-correlation and (6.00_–0.77^+1.09h₁₀₀^–1Mpc,1.25±0.18) for galaxy-O VI cross-correlation. We further estimate a bias factor of b_gg=1.3±0.1 from the galaxy-galaxy auto-correlation, indicating the galaxies are hosted by halos with mass M_halo~10^12.1±0.05^M_☉. Finally, we estimate an O VI-galaxy bias factor b_OVI=1.0±0.1 from the cross-correlation which is consistent with O VI absorbers being hosted by dark matter halos with typical mass M_halo~10¹¹M_☉. Future works with upcoming data sets (e.g., CGM²) will improve upon these results and will assess whether any of the detected O VI arises in the intergalactic medium.