The relationship between gas and galaxies at <i>z</i> &amp;lt; 1 using the Q0107 quasar triplet

ABSTRACT We study the distribution and dynamics of circumgalactic intergalactic medium using a dense galaxy survey covering field around Q0107 system, unique z ? 1 projected quasar triplet. With full Ly ? coverage along all three lines-of-sight from = 0.18 to 0.73, more than 1200 spectra, two MUSE fields, we examine structure gas galaxies on 100–1000 kpc scales. search for H i absorption systems occurring at same redshift (within 500 km s?1) in multiple sightlines, finding with &amp;gt;99.9 per cent significance that these are frequent observed spectra randomly distributed population absorbers. This is driven primarily by column densities N(H i) &amp;gt; 1014 cm?2, whilst multi-sightline absorbers lower consistent random distribution. Star-forming likely be associated quiescent galaxies. HST imaging provides inclinations position angles subset observe bimodality angle detected galaxy-absorber pairs, again mostly high-column-density absorbers, preferentially major minor axes out impact parameters several hundred kpc. find some evidence supporting disc/outflow dichotomy, as near axis show line-of-sight velocities tend align rotation galaxy, minor-axis twice exhibit O vi redshift.