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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-9152
DTSTART:20250424T203000Z
DTEND:20250424T213000Z
DTSTAMP:20260413T201339Z
LAST-MODIFIED:20250314T121704Z
LOCATION:4421 Sterling Hall
SUMMARY:Galactic Correlates of Supermassive Black Hole Growth and Thei
 r Application\, Astronomy Colloquium\, Niel Brandt\, Penn State
DESCRIPTION:The co-evolution of supermassive black holes (SMBHs) and g
 alaxies can be effectively constrained through sample-based analyses o
 f the galactic correlates of long-term SMBH growth. Relevant correlate
 s include galaxy stellar mass (M*)\, star formation rate (SFR)\, and c
 ompactness. The sample-averaged SMBH accretion rate (BHAR)\, which con
 strains long-term SMBH growth in galaxy populations of interest\, is s
 tatistically measured using data from sensitive X-ray surveys includin
 g the Chandra Deep Fields\, XMM-SERVS\, COSMOS\, and eFEDS. We have be
 en advancing such investigations using partial-correlation analyses an
 d complete\, high-quality samples now reaching 8100 AGNs in 1.3 millio
 n galaxies\, and I will briefly summarize some key findings. Specifica
 lly\, (1) for the general galaxy population at z = 0.1-4\, SMBH growth
  correlates most strongly with M*\; (2) for bulge-dominated systems\, 
 a strong BHAR-SFR correlation is observed\, indicating synchronized gr
 owth between SMBHs and bulges\; (3) BHAR also clearly correlates with 
 galaxy compactness among star-forming galaxies\, likely due to enhance
 d nuclear gas density for compact galaxies. Furthermore\, combining th
 ese empirical correlations with large-scale numerical simulations of g
 alaxy evolution enables improved tracking of SMBH growth through accre
 tion and mergers across cosmic history. This approach provides insight
 s into the evolution of the SMBH mass function\, the SMBH mass-M* scal
 ing relation\, the relative importance of accretion and mergers to ove
 rall SMBH growth\, and long-lived wandering SMBHs.
URL:https://www.physics.wisc.edu/events/?id=9152
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