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SUMMARY:The Main Sequence of star-forming galaxies - Lester Sandles
DTSTART:20220504T121500Z
DTEND:20220504T124500Z
UID:TALK173969@talks.cam.ac.uk
CONTACT:Francisco Paz-C
DESCRIPTION:Recent works have provided clues to the physical drivers of th
 e existence of the observed strong correlation between stellar mass and st
 ar formation rate (SFR) in ‘normal’ star forming galaxies. To date\, t
 he low mass end of this sequence is best measured at the highest redshifts
  with Hubble+Spitzer photometry\, with ground-based K-band data to bridge 
 the gap. We revisit the measurement of this relation from the Hubble Front
 ier Fields using BEAGLE\, a Bayesian SED fitting code (Chevallard & Charlo
 t 2016)\, to compute the posterior mass\, SFR and redshift for main sequen
 ce galaxies spanning cosmic time. Our Bayesian hierarchical model of the m
 ain sequence (an extension of the work of Curtis-Lake et al. 2021) self-co
 nsistently propagates uncertainties on mass\, SFR and redshift estimates t
 o uncertainties on the main sequence parameters\, whilst explicitly accoun
 ting for potential main sequence outliers. In this study we measure the ma
 in sequence relation between 1<z<6 for galaxies with stellar masses as low
  as 10^7 M⊙. Our results are consistent with the redshift evolution of t
 he rate of accretion of gas onto dark matter halos at high redshifts. We a
 lso provide a comprehensive analysis of potential method induced biases\, 
 and limitations of the dataset that can be overcome with JWST.
LOCATION:The Hoyle Lecture Theatre + Zoom 
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