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SUMMARY:A resolved view of z>6 quasar host galaxies - Romain Meyer (Heidel
 berg)
DTSTART:20221021T103000Z
DTEND:20221021T113000Z
UID:TALK182711@talks.cam.ac.uk
CONTACT:Sandro Tacchella
DESCRIPTION: Observations of z>6 luminous quasars in the FIR regime probe 
 the first steps of the galaxy-SMBH coevolution in the first billion years 
 of the Universe. ALMA/NOEMA studies of luminous z>6 quasars accreting at n
 early Eddington rate have shown that they are hosted by massive\, highly s
 tar-forming galaxies\, in agreement with theoretical predictions. However\
 , early studies did not have either the resolution to study the resolved I
 SM of the host galaxies\, nor the multi-frequency information to probe its
  properties\, which is necessary to understand how the rapid growth of the
  central SMBH.\nI will present hyper-resolution (~100-300 pc\, ~0.”02-0.
 ”04) ALMA observations of z=6.6-6.9 quasar host galaxies in the [CII] li
 ne. These observations reveal surprisingly compact host morphologies both 
 in dust and [CII] emission (0.5-2 kpc)\, with a substantial fraction (~30%
 ) of their intense star-forming activity and high gas mass concentrated wi
 thin the inner 200-300 parsecs. The galaxies resolved kinematics come in a
  wide variety ranging from smooth rotating disks to dispersion-dominated s
 ystems and mergers. I will also show recent multi-frequency observations i
 n specific systems\, which probe the mechanisms behind the ionisation and 
 temperature state of their ISM. Overall\, these new observations showcase 
 the potential of ALMA/NOEMA to study simultaneously the first massive gala
 xies in the Epoch of Reionisation and their co-evolution with their centra
 l SMBH.
LOCATION:in person & via zoom 
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