The Astrophysical Journal (Jan 2024)
Constraints on the Lyman Continuum Escape from Low-mass Lensed Galaxies at 1.3 ≤ z ≤ 3.0
- Intae Jung,
- Henry C. Ferguson,
- Matthew J. Hayes,
- Alaina Henry,
- Anne E. Jaskot,
- Daniel Schaerer,
- Keren Sharon,
- Ricardo O. Amorín,
- Hakim Atek,
- Matthew B. Bayliss,
- Håkon Dahle,
- Steven L. Finkelstein,
- Andrea Grazian,
- Lucia Guaita,
- Göran Östlin,
- Laura Pentericci,
- Swara Ravindranath,
- Claudia Scarlata,
- Harry I. Teplitz,
- Anne Verhamme
Affiliations
- Intae Jung
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA ; [email protected]
- Henry C. Ferguson
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA ; [email protected]
- Matthew J. Hayes
- ORCiD
- Stockholm University , Department of Astronomy and Oskar Klein Centre for Cosmoparticle Physics, AlbaNova University Centre, SE-10691, Stockholm, Sweden
- Alaina Henry
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA ; [email protected]; Center for Astrophysical Sciences, Department of Physics & Astronomy, Johns Hopkins University , Baltimore, MD 21218, USA
- Anne E. Jaskot
- ORCiD
- Department of Astronomy, Williams College , Williamstown, MA 01267, USA
- Daniel Schaerer
- ORCiD
- Observatoire de Genève, Université de Genève , Chemin Pegasi 51, 1290 Versoix, Switzerland; CNRS , IRAP, 14 Avenue E. Belin, 31400 Toulouse, France
- Keren Sharon
- ORCiD
- Department of Astronomy, University of Michigan , 1085 S. University Avenue, Ann Arbor, MI 48109, USA
- Ricardo O. Amorín
- ORCiD
- ARAID Foundation, Centro de Estudios de Física del Cosmos de Aragón (CEFCA) , Unidad Asociada al CSIC, Plaza San Juan 1, E–44001 Teruel, Spain; Departamento de Astronomía, Universidad de La Serena , Av. Juan Cisternas 1200 Norte, La Serena 1720236, Chile
- Hakim Atek
- ORCiD
- Institut d’Astrophysique de Paris, CNRS, Sorbonne Université , 98bis Boulevard Arago, 75014, Paris, France
- Matthew B. Bayliss
- ORCiD
- Department of Physics, University of Cincinnati , Cincinnati, OH 45221, USA
- Håkon Dahle
- ORCiD
- Institute of Theoretical Astrophysics, University of Oslo , P.O. Box 1029, Blindern, NO-0315 Oslo, Norway
- Steven L. Finkelstein
- ORCiD
- Department of Astronomy, The University of Texas at Austin , Austin, TX, USA
- Andrea Grazian
- ORCiD
- INAF–Osservatorio Astronomico di Padova , Vicolo dell’Osservatorio 5, I-35122, Padova, Italy
- Lucia Guaita
- ORCiD
- Universidad Andres Bello , Facultad de Ciencias Exactas, Departamento de Fisica, Instituto de Astrofisica, Fernandez Concha 700, Las Condes, Santiago RM, Chile
- Göran Östlin
- ORCiD
- Department of Astronomy and Oskar Klein Centre for Cosmoparticle Physics, AlbaNova University Centre , Stockholm University, SE-10691, Stockholm, Sweden
- Laura Pentericci
- ORCiD
- INAF—Osservatorio Astronomico di Roma , via di Frascati 33, 00078 Monte Porzio Catone, Italy
- Swara Ravindranath
- ORCiD
- Astrophysics Science Division, NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA; Center for Research and Exploration in Space Science and Technology II, Department of Physics, Catholic University of America , 620 Michigan Avenue N.E., Washington, DC 20064, USA
- Claudia Scarlata
- ORCiD
- Minnesota Institute for Astrophysics, University of Minnesota , 316 Church Street, SE Minneapolis, MN 55455, USA
- Harry I. Teplitz
- ORCiD
- IPAC, Mail Code 314-6, California Institute of Technology , 1200 E. California Boulevard, Pasadena, CA 91125, USA
- Anne Verhamme
- ORCiD
- Observatoire de Genève, Université de Genève , Chemin Pegasi 51, 1290 Versoix, Switzerland
- DOI
- https://doi.org/10.3847/1538-4357/ad554d
- Journal volume & issue
-
Vol. 971,
no. 2
p. 175
Abstract
Low-mass galaxies can significantly contribute to reionization due to their potentially high Lyman continuum (LyC) escape fraction and relatively high space density. We present a constraint on the LyC escape fraction from low-mass galaxies at z = 1.3–3.0. We obtained rest-frame UV continuum imaging with the ACS/SBC and the WFC3/UVIS from the Hubble Space Telescope for eight strongly lensed galaxies that were identified in the Sloan Giant Arc Survey and the Cluster Lensing and Supernova survey with Hubble. The targeted galaxies were selected to be spectroscopically confirmed, highly magnified, and blue in their UV spectral shapes ( β 2 σ ) detections of LyC fluxes, placing 1 σ upper limits on the absolute LyC escape fractions of 3%–15%. Our observations do not support the expected increased escape fractions of LyC photons from intrinsically UV faint sources. Considering the highly anisotropic geometry of LyC escape, increasing the sample size of faint galaxies in future LyC observations is crucial.
Keywords
- Reionization
- Extragalactic astronomy
- Dwarf galaxies
- Ultraviolet astronomy
- Strong gravitational lensing
