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SUMMARY:The growth of supermassive black holes in the absence of mergers 
 and the effect on their host galaxies - Rebecca Smethurst (University of O
 xford)
DTSTART:20220311T113000Z
DTEND:20220311T123000Z
UID:TALK168161@talks.cam.ac.uk
CONTACT:Ricarda Beckmann
DESCRIPTION:The co-evolution of galaxies and their supermassive black hol
 es (SMBHs) dominated by mergers is a long-held paradigm that has recently
  been overturned. With a sample of `bulgeless’ disk-dominated galaxies 
 Simmons\, Smethurst & Lintott (2017) showed that in the absence of merger
 s\, SMBHs can grow to 10^9 solar masses. A follow up study by Martin et 
 al. (2018) found that in simulations\, 65% of all the matter contained in
  SMBHs at z~0 was acquired through non-merger processes. We now present d
 etailed KCWI IFU observations of the [OIII] 5007 Å component for 4 of t
 hese `bulgeless’ disk-dominated galaxies hosting luminous\, unobscured 
 AGN with spectrally confirmed blue shifted outflows\, presumed to be powe
 red by the AGN itself. These massive galaxies’ formation histories are
  dominated by non-merger secular processes and thus provide a unique o
 pportunity to study how inflows from secular processes fuel significant g
 rowth of black holes in the absence of significant mergers. We calculate
  outflow rates for these AGN in the range 0.12 − 0.7 M_sun/yr\, with 
 velocities of 675 − 1710 km/s\, large maximum radial extents of 0.6
  − 2.4 kpc\, and SMBH accretion rates of 0.02 − 0.07 M_sun/yr. W
 e find that the outflow rates\, kinematics\, and energy injection rates 
 are typical of the wider population of low-redshift AGN\, and have veloc
 ities that exceed the galaxy escape velocity by a factor of ~30\, suggesti
 ng that these outflows will have a substantial impact on their galaxies 
 through AGN feedback. This has interesting implications: if both merger-d
 riven and non-merger-driven SMBH growth lead to co-evolution\, this sugge
 sts that co-evolution is regulated by feedback in both scenarios.
LOCATION:via zoom 
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