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Dusty-wind-clear JWST Super-early Galaxies

Fabrizio Fiore
•
Andrea Ferrara
•
Manuela Bischetti
altro
Andrea Travascio
2023
  • journal article

Periodico
THE ASTROPHYSICAL JOURNAL LETTERS
Abstract
The JWST discovery of a number of super-early (redshift z > 10) blue galaxies requires these systems to be essentially dust free in spite of their large stellar masses. A possible explanation is that dust is evacuated by radiatively driven outflows. We test this hypothesis by deriving the Eddington ratio lambda(E) = L-bol/L-E, where L-bol is the bolometric luminosity produced by star formation and possible black hole accretion, for 134 galaxies at 6.5 < z < 16. We find a strong anticorrelation between lambda(E) and dust UV optical depth, tau(1500) infinity lambda(-0.63)(E) also, lambda(E) increases with redshift. We confirm that galaxies exceeding a specific star formation rate sSFR > 13 Gyr(-1 )develop powerful outflows clearing the galaxy from its dust. This result is supported by ALMA dust continuum nondetections in three super-early systems.
DOI
10.3847/2041-8213/acb5f2
WOS
WOS:000925335600001
Archivio
https://hdl.handle.net/11368/3053201
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85147666986
https://iopscience.iop.org/article/10.3847/2041-8213/acb5f2
Diritti
open access
license:creative commons
license uri:http://creativecommons.org/licenses/by/4.0/
FVG url
https://arts.units.it/bitstream/11368/3053201/3/Fiore_2023_ApJL_943_L27.pdf
Soggetti
  • Unified Astronomy The...

  • High-redshift galaxie...

  • Galaxy evolution

  • Galaxy formation

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