Kavli Affiliate: Roberto Maiolino
| First 5 Authors: Charity Woodrum, Charity Woodrum, , ,
| Summary:
We present the star formation and dust attenuation properties for a sample of
602 galaxies at redshifts $rm3<z<7$, as part of the JADES survey. Our
analysis is based on measurements of the $rmHalpha/rmHbeta$ Balmer
Decrement using medium resolution (R$sim$1000) spectroscopic observations with
the JWST/NIRSpec Micro-Shutter Assembly. Stellar masses and star formation
rates (SFRs) are inferred with textttProspector using deep multi-band
imaging. We utilize the Balmer decrement to measure dust-corrected
H$alpha$-based SFRs, taking into account the subsolar metallicities observed
in galaxies at high redshift. We confirm, with our large sample size, that the
correlation between the Balmer decrement and stellar mass is already
established out to $zsim7$. We find that the relation between the Balmer
decrement and stellar mass does not significantly evolve from the local
universe to $zsim7$. We investigate the UV slope as a function of the Balmer
optical depth and find that the best-fit correlation for our high redshift
sample is sSFR dependent and significantly different at high redshift when
compared to galaxies at $zapprox 0$ and $z approx 2$. For the highest sSFR
galaxies in our sample, there is no significant correlation between the UV
slope and Balmer optical depth. This is evidence that the UV slope should be
used with great caution to correct for dust in high redshift galaxies.
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