MUSE-ALMA Haloes VII: Survey Science Goals & Design, Data Processing and Final Catalogues by Céline Péroux et al. on Wednesday 30 November

The gas cycling in the circumgalactic regions of galaxies is known to be

multi-phase. The MUSE-ALMA Haloes survey gathers a large multi-wavelength

observational sample of absorption and emission data with the goal to

significantly advance our understanding of the physical properties of such CGM

gas. A key component of the MUSE-ALMA Haloes survey is the multi-facility

observational campaign conducted with VLT/MUSE, ALMA and HST. MUSE-ALMA Haloes

targets comprise 19 VLT/MUSE IFS quasar fields, including 32 $z_{\rm abs}<$0.85

strong absorbers with measured N$_{HI}$ $\geq 10^{18}$ cm$^{\rm -2}$ from

UV-spectroscopy. We additionally use a new complementary HST medium program to

characterise the stellar content of the galaxies through a 40-orbit three-band

UVIS and IR WFC3 imaging. Beyond the absorber-selected targets, we detect 3658

sources all fields combined, including 703 objects with spectroscopic

redshifts. This galaxy-selected sample constitutes the main focus of the

current paper. We have secured millimeter ALMA observations of some of the

fields to probe the molecular gas properties of these objects. Here, we present

the overall survey science goals, target selection, observational strategy,

data processing and source identification of the full sample. Furthermore, we

provide catalogues of magnitude measurements for all objects detected in

VLT/MUSE, ALMA and HST broad-band images and associated spectroscopic redshifts

derived from VLT/MUSE observations. Together, this data set provides robust

characterisation of the neutral atomic gas, molecular gas and stars in the same

objects resulting in the baryon census of condensed matter in complex galaxy

structures.

arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.16517v1