Flury, Sophia R. and Jaskot, Anne E. and Ferguson, Harry C. and Worseck, Gábor and Makan, Kirill and Chisholm, John and Saldana-Lopez, Alberto and Schaerer, Daniel and McCandliss, Stephan R. and Xu, Xinfeng and Wang, Bingjie and Oey, M. S. and Ford, N. M. and Heckman, Timothy and Ji, Zhiyuan and Giavalisco, Mauro and Amorín, Ricardo and Atek, Hakim and Blaizot, Jeremy and Borthakur, Sanchayeeta and Carr, Cody and Castellano, Marco and De Barros, Stephane and Dickinson, Mark and Finkelstein, Steven L. and Fleming, Brian and Fontanot, Fabio and Garel, Thibault and Grazian, Andrea and Hayes, Matthew and Henry, Alaina and Mauerhofer, Valentin and Micheva, Genoveva and Ostlin, Goran and Papovich, Casey and Pentericci, Laura and Ravindranath, Swara and Rosdahl, Joakim and Rutkowski, Michael and Santini, Paola and Scarlata, Claudia and Teplitz, Harry and Thuan, Trinh and Trebitsch, Maxime and Vanzella, Eros and Verhamme, Anne (2022) The Low-redshift Lyman Continuum Survey. II. New Insights into LyC Diagnostics. Astrophysical Journal, 930 (2). Art. No. 126. ISSN 0004-637X. doi:10.3847/1538-4357/ac61e4. https://resolver.caltech.edu/CaltechAUTHORS:20220512-561410000
![[img]](https://authors.library.caltech.edu/style/images/fileicons/application_pdf.png) |
PDF
- Published Version
Creative Commons Attribution. 3MB |
|
PDF
- Accepted Version
Creative Commons Attribution. 1MB |
Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20220512-561410000
Abstract
The Lyman continuum (LyC) cannot be observed at the epoch of reionization (z ≳ 6) owing to intergalactic H i absorption. To identify LyC emitters (LCEs) and infer the fraction of escaping LyC, astronomers have developed various indirect diagnostics of LyC escape. Using measurements of the LyC from the Low-redshift Lyman Continuum Survey (LzLCS), we present the first statistical test of these diagnostics. While optical depth indicators based on Lyα, such as peak velocity separation and equivalent width, perform well, we also find that other diagnostics, such as the [O iii]/[O ii] flux ratio and star formation rate surface density, predict whether a galaxy is an LCE. The relationship between these galaxy properties and the fraction of escaping LyC flux suggests that LyC escape depends strongly on H i column density, ionization parameter, and stellar feedback. We find that LCEs occupy a range of stellar masses, metallicities, star formation histories, and ionization parameters, which may indicate episodic and/or different physical causes of LyC escape.
| Item Type: | Article | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Related URLs: |
| ||||||||||||||
| ORCID: | |||||||||||||||
| Additional Information: | © 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Received 2021 August 5; revised 2022 March 16; accepted 2022 March 26; published 2022 May 11. Support for this work was provided by NASA through grant No. HST-GO-15626 from the Space Telescope Science Institute. Additional work was based on observations made with the NASA/ESA Hubble Space Telescope, obtained from the data archive at the Space Telescope Science Institute from HST proposals 13744, 14635, 15341, and 15639. STScI is operated by the Association of Universities for Research in Astronomy, Inc. under NASA contract NAS 5-26555. Funding for the Sloan Digital Sky Survey IV has been provided by the Alfred P. Sloan Foundation, the U.S. Department of Energy Office of Science, and the Participating Institutions. SDSS-IV acknowledges support and resources from the Center for High Performance Computing at the University of Utah. The SDSS website is www.sdss.org. SDSS-IV is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS Collaboration. R.A. acknowledges support from ANID Fondecyt Regular 1202007. Software: astropy (Astropy Collaboration et al. 2013, 2018), matplotlib (Hunter 2007), numpy (van der Walt et al. 2011), scipy (Virtanen et al. 2020). | ||||||||||||||
| Group: | Infrared Processing and Analysis Center (IPAC) | ||||||||||||||
| Funders: |
| ||||||||||||||
| Subject Keywords: | Reionization; Galactic and extragalactic astronomy; Hubble Space Telescope; Ultraviolet astronomy; Emission line galaxies | ||||||||||||||
| Issue or Number: | 2 | ||||||||||||||
| Classification Code: | Unified Astronomy Thesaurus concepts: Reionization (1383); Galactic and extragalactic astronomy (563); Hubble Space Telescope (761); Ultraviolet astronomy (1736); Emission line galaxies (459) | ||||||||||||||
| DOI: | 10.3847/1538-4357/ac61e4 | ||||||||||||||
| Record Number: | CaltechAUTHORS:20220512-561410000 | ||||||||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20220512-561410000 | ||||||||||||||
| Official Citation: | Sophia R. Flury et al 2022 ApJ 930 126 | ||||||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||
| ID Code: | 114707 | ||||||||||||||
| Collection: | CaltechAUTHORS | ||||||||||||||
| Deposited By: | George Porter | ||||||||||||||
| Deposited On: | 13 May 2022 17:38 | ||||||||||||||
| Last Modified: | 13 May 2022 17:38 |
Repository Staff Only: item control page
