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Journal Articles The Astrophysical Journal Supplement Series Year : 2022

The Low-redshift Lyman Continuum Survey. I. New, Diverse Local Lyman Continuum Emitters

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Sophia R. Flury
  • Function : Author
Anne E. Jaskot
  • Function : Author
Harry C. Ferguson
  • Function : Author
Gábor Worseck
  • Function : Author
Kirill Makan
  • Function : Author
John Chisholm
  • Function : Author
Alberto Saldana-Lopez
  • Function : Author
Daniel Schaerer
  • Function : Author
Stephan Mccandliss
  • Function : Author
Bingjie Wang
  • Function : Author
N. M. Ford
  • Function : Author
Timothy Heckman
  • Function : Author
Zhiyuan Ji
  • Function : Author
Mauro Giavalisco
  • Function : Author
Ricardo Amorin
  • Function : Author
Sanchayeeta Borthakur
  • Function : Author
Cody Carr
  • Function : Author
Marco Castellano
  • Function : Author
Stefano Cristiani
  • Function : Author
Stephane de Barros
  • Function : Author
Mark Dickinson
  • Function : Author
Steven L. Finkelstein
  • Function : Author
Brian Fleming
  • Function : Author
Fabio Fontanot
  • Function : Author
Thibault Garel
  • Function : Author
Andrea Grazian
  • Function : Author
Matthew Hayes
  • Function : Author
Alaina Henry
  • Function : Author
Valentin Mauerhofer
  • Function : Author
Genoveva Micheva
  • Function : Author
M. S. Oey
  • Function : Author
Goran Ostlin
  • Function : Author
Casey Papovich
  • Function : Author
Laura Pentericci
  • Function : Author
Swara Ravindranath
  • Function : Author
Michael Rutkowski
  • Function : Author
Paola Santini
  • Function : Author
Claudia Scarlata
  • Function : Author
Harry Teplitz
  • Function : Author
Trinh Thuan
  • Function : Author
Maxime Trebitsch
  • Function : Author
Eros Vanzella
  • Function : Author
Xinfeng Xu
  • Function : Author

Abstract

The origins of Lyman continuum (LyC) photons responsible for the reionization of the universe are as of yet unknown and highly contested. Detecting LyC photons from the Epoch of Reionization is not possible due to absorption by the intergalactic medium, which has prompted the development of several indirect diagnostics to infer the rate at which galaxies contribute LyC photons to reionize the universe by studying lower-redshift analogs. We present the Low-redshift Lyman Continuum Survey (LzLCS) comprising measurements made with the Hubble Space Telescope Cosmic Origins Spectrograph for a z = 0.2-0.4 sample of 66 galaxies. After careful processing of the far-UV spectra, we obtain a total of 35 Lyman continuum emitters (LCEs) detected with 97.725% confidence, nearly tripling the number of known local LCEs. We estimate escape fractions from the detected LyC flux and upper limits on the undetected LyC flux, finding a range of LyC escape fractions up to 50%. Of the 35 LzLCS LCEs, 12 have LyC escape fractions greater than 5%, more than doubling the number of known local LCEs with cosmologically relevant LyC escape.
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Dates and versions

insu-03711520 , version 1 (01-07-2022)

Licence

Attribution - CC BY 4.0

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Sophia R. Flury, Anne E. Jaskot, Harry C. Ferguson, Gábor Worseck, Kirill Makan, et al.. The Low-redshift Lyman Continuum Survey. I. New, Diverse Local Lyman Continuum Emitters. The Astrophysical Journal Supplement Series, 2022, 260, ⟨10.3847/1538-4365/ac5331⟩. ⟨insu-03711520⟩
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