Loading…
The Physics of Indirect Estimators of Lyman Continuum Escape and their Application to High-Redshift JWST Galaxies
ABSTRACT Reliable indirect diagnostics of LyC photon escape from galaxies are required to understand which sources were the dominant contributors to reionization. While multiple LyC escape fraction (fesc) indicators have been proposed to trace favourable conditions for LyC leakage from the interstel...
Saved in:
Published in: | Monthly notices of the Royal Astronomical Society 2024-03, Vol.529 (4), p.3751-3767 |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
cited_by | cdi_FETCH-LOGICAL-c343t-c55a89521c6c60cae578472ce147168cd11f490ccb410e6ff9a0167e93712ea33 |
---|---|
cites | cdi_FETCH-LOGICAL-c343t-c55a89521c6c60cae578472ce147168cd11f490ccb410e6ff9a0167e93712ea33 |
container_end_page | 3767 |
container_issue | 4 |
container_start_page | 3751 |
container_title | Monthly notices of the Royal Astronomical Society |
container_volume | 529 |
creator | Choustikov, Nicholas Katz, Harley Saxena, Aayush Cameron, Alex J Devriendt, Julien Slyz, Adrianne Rosdahl, Joki Blaizot, Jeremy Michel-Dansac, Leo |
description | ABSTRACT
Reliable indirect diagnostics of LyC photon escape from galaxies are required to understand which sources were the dominant contributors to reionization. While multiple LyC escape fraction (fesc) indicators have been proposed to trace favourable conditions for LyC leakage from the interstellar medium of low-redshift ‘analogue’ galaxies, it remains unclear whether these are applicable at high redshifts where LyC emission cannot be directly observed. Using a library of 14 120 mock spectra of star-forming galaxies with redshifts 4.64 ≤ z ≤ 10 from the SPHINX20 cosmological radiation hydrodynamics simulation, we develop a framework for the physics that leads to high fesc. We investigate LyC leakage from our galaxies based on the criteria that successful LyC escape diagnostics must (i) track a high-specific star formation rate, (ii) be sensitive to stellar population age in the range 3.5–10 Myr representing the times when supernova first explode to when LyC production significantly drops, and (iii) include a proxy for neutral gas content and gas density in the interstellar medium. O32, ΣSFR, MUV, and H β equivalent width select for one or fewer of our criteria, rendering them either necessary but insufficient or generally poor diagnostics. In contrast, UV slope (β), and E(B − V) match two or more of our criteria, rendering them good fesc diagnostics (albeit with significant scatter). Using our library, we build a quantitative model for predicting fesc based on direct observables. When applied to bright z > 6 Ly α emitters observed with JWST, we find that the majority of them have $f_{\rm esc} \lesssim 10~{{\ \rm per\ cent}}$. |
doi_str_mv | 10.1093/mnras/stae776 |
format | article |
fullrecord | <record><control><sourceid>oup_hal_p</sourceid><recordid>TN_cdi_hal_primary_oai_HAL_hal_04759202v1</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><oup_id>10.1093/mnras/stae776</oup_id><sourcerecordid>10.1093/mnras/stae776</sourcerecordid><originalsourceid>FETCH-LOGICAL-c343t-c55a89521c6c60cae578472ce147168cd11f490ccb410e6ff9a0167e93712ea33</originalsourceid><addsrcrecordid>eNqFkD1PwzAQhi0EEqUwsnuEIdSOEzseq6q0RZFAUMQYHY5DjJI42C6i_570Q6xMJ733vCfdg9A1JXeUSDZpOwd-4gNoIfgJGlHG0yiWnJ-iESEsjTJB6Tm68P6TEJKwmI_Q17rW-KneeqM8thVedaVxWgU898G0EKzbx_m2hQ7PbBdMt9m0w1ZBrzF0JQ61Ng5P-74xCoKxHQ4WL81HHT3r0temCvjh7WWNF9DAj9H-Ep1V0Hh9dZxj9Ho_X8-WUf64WM2meaRYwkKk0hQymcZUccWJAp2KLBGx0jQRlGeqpLRKJFHqPaFE86qSQCgXWjJBYw2MjdHt4W4NTdG74Rm3LSyYYjnNi11GEpHKmMTfdGCjA6uc9d7p6q9ASbFzW-zdFke3A39z4O2m_wf9BYmKfMs</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>The Physics of Indirect Estimators of Lyman Continuum Escape and their Application to High-Redshift JWST Galaxies</title><source>Oxford Journals Open Access Collection</source><source>EZB Electronic Journals Library</source><creator>Choustikov, Nicholas ; Katz, Harley ; Saxena, Aayush ; Cameron, Alex J ; Devriendt, Julien ; Slyz, Adrianne ; Rosdahl, Joki ; Blaizot, Jeremy ; Michel-Dansac, Leo</creator><creatorcontrib>Choustikov, Nicholas ; Katz, Harley ; Saxena, Aayush ; Cameron, Alex J ; Devriendt, Julien ; Slyz, Adrianne ; Rosdahl, Joki ; Blaizot, Jeremy ; Michel-Dansac, Leo</creatorcontrib><description>ABSTRACT
Reliable indirect diagnostics of LyC photon escape from galaxies are required to understand which sources were the dominant contributors to reionization. While multiple LyC escape fraction (fesc) indicators have been proposed to trace favourable conditions for LyC leakage from the interstellar medium of low-redshift ‘analogue’ galaxies, it remains unclear whether these are applicable at high redshifts where LyC emission cannot be directly observed. Using a library of 14 120 mock spectra of star-forming galaxies with redshifts 4.64 ≤ z ≤ 10 from the SPHINX20 cosmological radiation hydrodynamics simulation, we develop a framework for the physics that leads to high fesc. We investigate LyC leakage from our galaxies based on the criteria that successful LyC escape diagnostics must (i) track a high-specific star formation rate, (ii) be sensitive to stellar population age in the range 3.5–10 Myr representing the times when supernova first explode to when LyC production significantly drops, and (iii) include a proxy for neutral gas content and gas density in the interstellar medium. O32, ΣSFR, MUV, and H β equivalent width select for one or fewer of our criteria, rendering them either necessary but insufficient or generally poor diagnostics. In contrast, UV slope (β), and E(B − V) match two or more of our criteria, rendering them good fesc diagnostics (albeit with significant scatter). Using our library, we build a quantitative model for predicting fesc based on direct observables. When applied to bright z > 6 Ly α emitters observed with JWST, we find that the majority of them have $f_{\rm esc} \lesssim 10~{{\ \rm per\ cent}}$.</description><identifier>ISSN: 0035-8711</identifier><identifier>EISSN: 1365-2966</identifier><identifier>DOI: 10.1093/mnras/stae776</identifier><language>eng</language><publisher>Oxford University Press</publisher><subject>Astrophysics ; Physics</subject><ispartof>Monthly notices of the Royal Astronomical Society, 2024-03, Vol.529 (4), p.3751-3767</ispartof><rights>2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. 2024</rights><rights>Attribution</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c343t-c55a89521c6c60cae578472ce147168cd11f490ccb410e6ff9a0167e93712ea33</citedby><cites>FETCH-LOGICAL-c343t-c55a89521c6c60cae578472ce147168cd11f490ccb410e6ff9a0167e93712ea33</cites><orcidid>0000-0001-5333-9970 ; 0000-0002-7973-5442 ; 0000-0002-7534-8314 ; 0000-0003-1609-7911 ; 0000-0002-0450-7306</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,780,784,885,1604,27924,27925</link.rule.ids><backlink>$$Uhttps://cnrs.hal.science/hal-04759202$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Choustikov, Nicholas</creatorcontrib><creatorcontrib>Katz, Harley</creatorcontrib><creatorcontrib>Saxena, Aayush</creatorcontrib><creatorcontrib>Cameron, Alex J</creatorcontrib><creatorcontrib>Devriendt, Julien</creatorcontrib><creatorcontrib>Slyz, Adrianne</creatorcontrib><creatorcontrib>Rosdahl, Joki</creatorcontrib><creatorcontrib>Blaizot, Jeremy</creatorcontrib><creatorcontrib>Michel-Dansac, Leo</creatorcontrib><title>The Physics of Indirect Estimators of Lyman Continuum Escape and their Application to High-Redshift JWST Galaxies</title><title>Monthly notices of the Royal Astronomical Society</title><description>ABSTRACT
Reliable indirect diagnostics of LyC photon escape from galaxies are required to understand which sources were the dominant contributors to reionization. While multiple LyC escape fraction (fesc) indicators have been proposed to trace favourable conditions for LyC leakage from the interstellar medium of low-redshift ‘analogue’ galaxies, it remains unclear whether these are applicable at high redshifts where LyC emission cannot be directly observed. Using a library of 14 120 mock spectra of star-forming galaxies with redshifts 4.64 ≤ z ≤ 10 from the SPHINX20 cosmological radiation hydrodynamics simulation, we develop a framework for the physics that leads to high fesc. We investigate LyC leakage from our galaxies based on the criteria that successful LyC escape diagnostics must (i) track a high-specific star formation rate, (ii) be sensitive to stellar population age in the range 3.5–10 Myr representing the times when supernova first explode to when LyC production significantly drops, and (iii) include a proxy for neutral gas content and gas density in the interstellar medium. O32, ΣSFR, MUV, and H β equivalent width select for one or fewer of our criteria, rendering them either necessary but insufficient or generally poor diagnostics. In contrast, UV slope (β), and E(B − V) match two or more of our criteria, rendering them good fesc diagnostics (albeit with significant scatter). Using our library, we build a quantitative model for predicting fesc based on direct observables. When applied to bright z > 6 Ly α emitters observed with JWST, we find that the majority of them have $f_{\rm esc} \lesssim 10~{{\ \rm per\ cent}}$.</description><subject>Astrophysics</subject><subject>Physics</subject><issn>0035-8711</issn><issn>1365-2966</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><sourceid>TOX</sourceid><recordid>eNqFkD1PwzAQhi0EEqUwsnuEIdSOEzseq6q0RZFAUMQYHY5DjJI42C6i_570Q6xMJ733vCfdg9A1JXeUSDZpOwd-4gNoIfgJGlHG0yiWnJ-iESEsjTJB6Tm68P6TEJKwmI_Q17rW-KneeqM8thVedaVxWgU898G0EKzbx_m2hQ7PbBdMt9m0w1ZBrzF0JQ61Ng5P-74xCoKxHQ4WL81HHT3r0temCvjh7WWNF9DAj9H-Ep1V0Hh9dZxj9Ho_X8-WUf64WM2meaRYwkKk0hQymcZUccWJAp2KLBGx0jQRlGeqpLRKJFHqPaFE86qSQCgXWjJBYw2MjdHt4W4NTdG74Rm3LSyYYjnNi11GEpHKmMTfdGCjA6uc9d7p6q9ASbFzW-zdFke3A39z4O2m_wf9BYmKfMs</recordid><startdate>20240323</startdate><enddate>20240323</enddate><creator>Choustikov, Nicholas</creator><creator>Katz, Harley</creator><creator>Saxena, Aayush</creator><creator>Cameron, Alex J</creator><creator>Devriendt, Julien</creator><creator>Slyz, Adrianne</creator><creator>Rosdahl, Joki</creator><creator>Blaizot, Jeremy</creator><creator>Michel-Dansac, Leo</creator><general>Oxford University Press</general><general>Oxford University Press (OUP): Policy P - Oxford Open Option A</general><scope>TOX</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>1XC</scope><scope>VOOES</scope><orcidid>https://orcid.org/0000-0001-5333-9970</orcidid><orcidid>https://orcid.org/0000-0002-7973-5442</orcidid><orcidid>https://orcid.org/0000-0002-7534-8314</orcidid><orcidid>https://orcid.org/0000-0003-1609-7911</orcidid><orcidid>https://orcid.org/0000-0002-0450-7306</orcidid></search><sort><creationdate>20240323</creationdate><title>The Physics of Indirect Estimators of Lyman Continuum Escape and their Application to High-Redshift JWST Galaxies</title><author>Choustikov, Nicholas ; Katz, Harley ; Saxena, Aayush ; Cameron, Alex J ; Devriendt, Julien ; Slyz, Adrianne ; Rosdahl, Joki ; Blaizot, Jeremy ; Michel-Dansac, Leo</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c343t-c55a89521c6c60cae578472ce147168cd11f490ccb410e6ff9a0167e93712ea33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2024</creationdate><topic>Astrophysics</topic><topic>Physics</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Choustikov, Nicholas</creatorcontrib><creatorcontrib>Katz, Harley</creatorcontrib><creatorcontrib>Saxena, Aayush</creatorcontrib><creatorcontrib>Cameron, Alex J</creatorcontrib><creatorcontrib>Devriendt, Julien</creatorcontrib><creatorcontrib>Slyz, Adrianne</creatorcontrib><creatorcontrib>Rosdahl, Joki</creatorcontrib><creatorcontrib>Blaizot, Jeremy</creatorcontrib><creatorcontrib>Michel-Dansac, Leo</creatorcontrib><collection>Oxford Journals Open Access Collection</collection><collection>CrossRef</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>Hyper Article en Ligne (HAL) (Open Access)</collection><jtitle>Monthly notices of the Royal Astronomical Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Choustikov, Nicholas</au><au>Katz, Harley</au><au>Saxena, Aayush</au><au>Cameron, Alex J</au><au>Devriendt, Julien</au><au>Slyz, Adrianne</au><au>Rosdahl, Joki</au><au>Blaizot, Jeremy</au><au>Michel-Dansac, Leo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The Physics of Indirect Estimators of Lyman Continuum Escape and their Application to High-Redshift JWST Galaxies</atitle><jtitle>Monthly notices of the Royal Astronomical Society</jtitle><date>2024-03-23</date><risdate>2024</risdate><volume>529</volume><issue>4</issue><spage>3751</spage><epage>3767</epage><pages>3751-3767</pages><issn>0035-8711</issn><eissn>1365-2966</eissn><abstract>ABSTRACT
Reliable indirect diagnostics of LyC photon escape from galaxies are required to understand which sources were the dominant contributors to reionization. While multiple LyC escape fraction (fesc) indicators have been proposed to trace favourable conditions for LyC leakage from the interstellar medium of low-redshift ‘analogue’ galaxies, it remains unclear whether these are applicable at high redshifts where LyC emission cannot be directly observed. Using a library of 14 120 mock spectra of star-forming galaxies with redshifts 4.64 ≤ z ≤ 10 from the SPHINX20 cosmological radiation hydrodynamics simulation, we develop a framework for the physics that leads to high fesc. We investigate LyC leakage from our galaxies based on the criteria that successful LyC escape diagnostics must (i) track a high-specific star formation rate, (ii) be sensitive to stellar population age in the range 3.5–10 Myr representing the times when supernova first explode to when LyC production significantly drops, and (iii) include a proxy for neutral gas content and gas density in the interstellar medium. O32, ΣSFR, MUV, and H β equivalent width select for one or fewer of our criteria, rendering them either necessary but insufficient or generally poor diagnostics. In contrast, UV slope (β), and E(B − V) match two or more of our criteria, rendering them good fesc diagnostics (albeit with significant scatter). Using our library, we build a quantitative model for predicting fesc based on direct observables. When applied to bright z > 6 Ly α emitters observed with JWST, we find that the majority of them have $f_{\rm esc} \lesssim 10~{{\ \rm per\ cent}}$.</abstract><pub>Oxford University Press</pub><doi>10.1093/mnras/stae776</doi><tpages>17</tpages><orcidid>https://orcid.org/0000-0001-5333-9970</orcidid><orcidid>https://orcid.org/0000-0002-7973-5442</orcidid><orcidid>https://orcid.org/0000-0002-7534-8314</orcidid><orcidid>https://orcid.org/0000-0003-1609-7911</orcidid><orcidid>https://orcid.org/0000-0002-0450-7306</orcidid><oa>free_for_read</oa></addata></record> |
fulltext | fulltext |
identifier | ISSN: 0035-8711 |
ispartof | Monthly notices of the Royal Astronomical Society, 2024-03, Vol.529 (4), p.3751-3767 |
issn | 0035-8711 1365-2966 |
language | eng |
recordid | cdi_hal_primary_oai_HAL_hal_04759202v1 |
source | Oxford Journals Open Access Collection; EZB Electronic Journals Library |
subjects | Astrophysics Physics |
title | The Physics of Indirect Estimators of Lyman Continuum Escape and their Application to High-Redshift JWST Galaxies |
url | http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-03T20%3A20%3A09IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-oup_hal_p&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=The%20Physics%20of%20Indirect%20Estimators%20of%20Lyman%20Continuum%20Escape%20and%20their%20Application%20to%20High-Redshift%20JWST%20Galaxies&rft.jtitle=Monthly%20notices%20of%20the%20Royal%20Astronomical%20Society&rft.au=Choustikov,%20Nicholas&rft.date=2024-03-23&rft.volume=529&rft.issue=4&rft.spage=3751&rft.epage=3767&rft.pages=3751-3767&rft.issn=0035-8711&rft.eissn=1365-2966&rft_id=info:doi/10.1093/mnras/stae776&rft_dat=%3Coup_hal_p%3E10.1093/mnras/stae776%3C/oup_hal_p%3E%3Cgrp_id%3Ecdi_FETCH-LOGICAL-c343t-c55a89521c6c60cae578472ce147168cd11f490ccb410e6ff9a0167e93712ea33%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_id=info:pmid/&rft_oup_id=10.1093/mnras/stae776&rfr_iscdi=true |