The Lyman Continuum Escape Fraction of Star-forming Galaxies at 2.4  ≲  <i>z</i> ≲ 3.0 from UVCANDELS

Abstract The UltraViolet Imaging of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey Fields (UVCANDELS) survey is a Hubble Space Telescope (HST) Cycle-26 Treasury Program, allocated in total 164 orbits of primary Wide-Field Camera 3 Ultraviolet and VISible light F275W imaging with coordinated parallel Advanced Camera for Surveys F435W imaging, on four of the five premier extragalactic survey fields: GOODS-N, GOODS-S, EGS, and COSMOS. We introduce this survey by presenting a comprehensive analysis of the absolute escape fraction ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msubsup> <mml:mrow> <mml:mi>f</mml:mi> </mml:mrow> <mml:mrow> <mml:mi mathvariant="normal">esc</mml:mi> </mml:mrow> <mml:mrow> <mml:mi mathvariant="normal">abs</mml:mi> </mml:mrow> </mml:msubsup> </mml:math> ) of Lyman continuum radiation through stacking the UV images of a population of star-forming galaxies with secure redshifts at 2.4 ≤ z ≤ 3.0. Our stacking benefits from the catalogs of high-quality spectroscopic redshifts compiled from archival ground-based data and HST slitless spectroscopy, carefully vetted by dedicated visual inspection efforts. We develop a robust stacking method to apply to 10 samples of in total 56 galaxies, and perform detailed Monte Carlo simulations of the intergalactic medium (IGM) attenuation, to take into account the sample variance of the mean IGM transmission when measuring <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msubsup> <mml:mrow> <mml:mi>f</mml:mi> </mml:mrow> <mml:mrow> <mml:mi mathvariant="normal">esc</mml:mi> </mml:mrow> <mml:mrow> <mml:mi mathvariant="normal">abs</mml:mi> </mml:mrow> </mml:msubsup> </mml:math> . The full stack at z ≈ 2.44 from 28 galaxies places a stringent 1 σ upper limit of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msubsup> <mml:mrow> <mml:mi>f</mml:mi> </mml:mrow> <mml:mrow> <mml:mi mathvariant="normal">esc</mml:mi> </mml:mrow> <mml:mrow> <mml:mi mathvariant="normal">abs</mml:mi> </mml:mrow> </mml:msubsup> <mml:mo>≲</mml:mo> <mml:mn>5</mml:mn> <mml:mo>%</mml:mo> </mml:math> , whereas the full stack at z ≈ 2.72 of an equal number of galaxies gives an upper limit of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msubsup> <mml:mrow> <mml:mi>f</mml:mi> </mml:mrow> <mml:mrow> <mml:mi mathvariant="normal">esc</mml:mi> </mml:mrow> <mml:mrow> <mml:mi mathvariant="normal">abs</mml:mi> </mml:mrow> </mml:msubsup> <mml:mo>≲</mml:mo> <mml:mn>26</mml:mn> <mml:mo>%</mml:mo> </mml:math> at 1 σ confidence level. These new F275W and F435W imaging mosaics from UVCANDELS have been made publicly available on the Barbara A. Mikulski Archive for Space Telescopes.

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Journal
The Astrophysical Journal
Published
2025-02-05
DOI
https://doi.org/10.3847/1538-4357/ada4ab
Citations
14
Primary Topic
Galaxies: Formation, Evolution, Phenomena
Type
article
Field-Weighted Citation Impact
16.17

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article

The Lyman Continuum Escape Fraction of Star-forming Galaxies at 2.4  ≲  z ≲ 3.0 from UVCANDELS

Matthew Hayes, Ray A. Lucas, Zhiyuan Ji, Ben Sunnquist et al.
14 citations
The Astrophysical Journal
Galaxies: Formation, Evolution, Phenomena
16.17
article

The Lyman Continuum Escape Fraction of Star-forming Galaxies at 2.4  ≲  z ≲ 3.0 from UVCANDELS

Matthew Hayes, Ray A. Lucas, Zhiyuan Ji, Ben Sunnquist, Romeel Davé, Y. Sophia Dai, Rogier A. Windhorst, Marc Rafelski, R. W. O’Connell, Harry I. Teplitz, Laura Prichard, Rolf A. Jansen, Norman A. Grogin, Laura DeGroot, Nimish P. Hathi, Timothy Carleton, Anahita Alavi, Teresa Ashcraft, Adam Broussard, Christopher J. Conselice, Pablo Arrabal Haro, Seth H. Cohen, Henry C. Ferguson, Anton M. Koekemoer, D. F. de Mello, Ivano Baronchelli, Alex Codoreanu, Vihang Mehta, Brent M. Smith, Guillermo Barro, Xin Wang, James Colbert, Steven L. Finkelstein, Yicheng Guo, E. Vanzella, Mark Dickinson, Behnam Darvish, Najmeh Emami, Micaela B. Bagley, Eric Gawiser, Gabriel Brammer, Brant E. Robertson, Brian Siana, Nima Chartab, Claudia Scarlata, Keely Finkelstein, Alex Blanche, Leonardo Ferreira, Michael Rutkowski, Y. Cheng
article en
14 citations

Abstract

Abstract The UltraViolet Imaging of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey Fields (UVCANDELS) survey is a Hubble Space Telescope (HST) Cycle-26 Treasury Program, allocated in total 164 orbits of primary Wide-Field Camera 3 Ultraviolet and VISible light F275W imaging with coordinated parallel Advanced Camera for Surveys F435W imaging, on four of the five premier extragalactic survey fields: GOODS-N, GOODS-S, EGS, and COSMOS. We introduce this survey by presenting a comprehensive analysis of the absolute escape fraction ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msubsup> <mml:mrow> <mml:mi>f</mml:mi> </mml:mrow> <mml:mrow> <mml:mi mathvariant="normal">esc</mml:mi> </mml:mrow> <mml:mrow> <mml:mi mathvariant="normal">abs</mml:mi> </mml:mrow> </mml:msubsup> </mml:math> ) of Lyman continuum radiation through stacking the UV images of a population of star-forming galaxies with secure redshifts at 2.4 ≤ z ≤ 3.0. Our stacking benefits from the catalogs of high-quality spectroscopic redshifts compiled from archival ground-based data and HST slitless spectroscopy, carefully vetted by dedicated visual inspection efforts. We develop a robust stacking method to apply to 10 samples of in total 56 galaxies, and perform detailed Monte Carlo simulations of the intergalactic medium (IGM) attenuation, to take into account the sample variance of the mean IGM transmission when measuring <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msubsup> <mml:mrow> <mml:mi>f</mml:mi> </mml:mrow> <mml:mrow> <mml:mi mathvariant="normal">esc</mml:mi> </mml:mrow> <mml:mrow> <mml:mi mathvariant="normal">abs</mml:mi> </mml:mrow> </mml:msubsup> </mml:math> . The full stack at z ≈ 2.44 from 28 galaxies places a stringent 1 σ upper limit of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msubsup> <mml:mrow> <mml:mi>f</mml:mi> </mml:mrow> <mml:mrow> <mml:mi mathvariant="normal">esc</mml:mi> </mml:mrow> <mml:mrow> <mml:mi mathvariant="normal">abs</mml:mi> </mml:mrow> </mml:msubsup> <mml:mo>≲</mml:mo> <mml:mn>5</mml:mn> <mml:mo>%</mml:mo> </mml:math> , whereas the full stack at z ≈ 2.72 of an equal number of galaxies gives an upper limit of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msubsup> <mml:mrow> <mml:mi>f</mml:mi> </mml:mrow> <mml:mrow> <mml:mi mathvariant="normal">esc</mml:mi> </mml:mrow> <mml:mrow> <mml:mi mathvariant="normal">abs</mml:mi> </mml:mrow> </mml:msubsup> <mml:mo>≲</mml:mo> <mml:mn>26</mml:mn> <mml:mo>%</mml:mo> </mml:math> at 1 σ confidence level. These new F275W and F435W imaging mosaics from UVCANDELS have been made publicly available on the Barbara A. Mikulski Archive for Space Telescopes.

The Astrophysical JournalVol. 980(1)
Damien Foundation (BD)
National Natural Science Foundation of China, Science and Technology Facilities Council, Fundamental Research Funds for the Central Universities
Openalex Percentile: Top 1%
Galaxies: Formation, Evolution, Phenomena
16.17
DOIOpen Access PDFOpenAlex
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