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SUMMARY:Detection of massive molecular and dust reservoirs around z~2 extr
 emely red quasars: CGM enrichment by quasar-driven outflows - Jan Scholtz 
 (University of Cambridge)
DTSTART:20220427T124500Z
DTEND:20220427T131500Z
UID:TALK173342@talks.cam.ac.uk
CONTACT:Hannah Uebler
DESCRIPTION:Large scale outflows are believed to be an important mechanism
  in the evolution of galaxies\, as they can both suppress and enhance star
  formation as well as eject gas from their host galaxies and mix the prist
 ine gas from the intergalactic medium and processed material from the gala
 xy in the circum-galactic medium (CGM). We can study the impact of these l
 arge-scale outflows either by tracing the current outflows (by studying br
 oad emission line profiles)\, or by studying the impact of past outflows o
 n the gas surrounding the galaxy.\nIn this work\, we examined the CO(7-6)\
 , [CI](2-1)\, H2O (806 GHz) and dust continuum ALMA observations of 15 ext
 remely red quasars (eRQSOs) at z=2.3. By investigating the radial surface 
 brightness profiles of both the individual sources and the stacked emissio
 n\, we detect extended cold gas and dust emission on scales of ca. 14 kpc 
 in CO(7-6)\,  [CI](2-1)\, and dust continuum. We have further confirmed ou
 r results by investigating the visibilities of individual targets and the 
 stacked visibilities.\nIn this talk\, I will compare the measured sizes an
 d dust and cold gas masses of our detected halos with those from previous 
 studies of cold gas halos around star-forming galaxies across redshifts 2-
 4 and discuss the impact of large scale outflows on the CGM around extreme
 ly powerful quasars.
LOCATION:The Hoyle Lecture Theatre + Zoom 
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