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Lyman Continuum Escape Fraction from Low-mass Starbursts at z = 1.3
We present a new constraint on the Lyman continuum (LyC) escape fraction at . We obtain deep, high sensitivity far-UV imaging with the Advanced Camera for Surveys Solar Blind Channel on the Hubble Space Telescope, targeting 11 star-forming galaxies at 1.2
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Published in: | The Astrophysical journal 2020-11, Vol.904 (1), p.59 |
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creator | Alavi, Anahita Colbert, James Teplitz, Harry I. Siana, Brian Scarlata, Claudia Rutkowski, Michael Mehta, Vihang Henry, Alaina Dai 戴, Y. Sophia 昱 Haardt, Francesco Bagley, Micaela |
description | We present a new constraint on the Lyman continuum (LyC) escape fraction at
. We obtain deep, high sensitivity far-UV imaging with the Advanced Camera for Surveys Solar Blind Channel on the Hubble Space Telescope, targeting 11 star-forming galaxies at 1.2 |
doi_str_mv | 10.3847/1538-4357/abbd43 |
format | article |
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. We obtain deep, high sensitivity far-UV imaging with the Advanced Camera for Surveys Solar Blind Channel on the Hubble Space Telescope, targeting 11 star-forming galaxies at 1.2 <
z
< 1.4. The galaxies are selected from the 3D-HST survey to have high H
α
equivalent width (EW) with an EW > 190 Å, low stellar mass (
M
*
< 10
10
M
⊙
), and
U
-band magnitude of
U
< 24.2. These criteria identify young, low metallicity star-bursting populations similar to the early star-forming galaxies believed to have reionized the universe. We do not detect any LyC signal (with a signal-to-noise ratio > 3) in the individual galaxies or in the stack in the far-UV images. We place 3
σ
limits on the relative escape fraction of individual galaxies to be
and a stacked 3
σ
limit of
. Measuring various galaxy properties, including stellar mass, dust attenuation, and star formation rate, we show that our measured values fall within the broad range of values covered by the confirmed LyC emitters from the literature. In particular, we compare the distribution of H
α
and [O
III
] EWs of confirmed LyC emitters and non-detections, including the galaxies in this study. Finally, we discuss if a dichotomy seen in the distribution of H
α
EWs can perhaps distinguish the LyC emitters from the non-detections.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.3847/1538-4357/abbd43</identifier><language>eng</language><publisher>Philadelphia: IOP Publishing</publisher><subject>Astrophysics ; Attenuation ; Cosmic dust ; Early stars ; Emitters ; Galaxies ; Hubble Space Telescope ; Metallicity ; Polls & surveys ; Signal to noise ratio ; Space telescopes ; Star & galaxy formation ; Star formation ; Star formation rate ; Stellar mass</subject><ispartof>The Astrophysical journal, 2020-11, Vol.904 (1), p.59</ispartof><rights>Copyright IOP Publishing Nov 01, 2020</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c379t-7cbd38735b89ca186b8fb5e8ba6d612a36c16c1a9c9717e93d271f03bf92df7f3</citedby><cites>FETCH-LOGICAL-c379t-7cbd38735b89ca186b8fb5e8ba6d612a36c16c1a9c9717e93d271f03bf92df7f3</cites><orcidid>0000-0002-7064-5424 ; 0000-0002-8630-6435 ; 0000-0001-7016-5220 ; 0000-0001-7166-6035 ; 0000-0002-9921-9218 ; 0000-0002-9136-8876 ; 0000-0002-7928-416X ; 0000-0002-6586-4446 ; 0000-0003-3291-3704 ; 0000-0002-4935-9511</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Alavi, Anahita</creatorcontrib><creatorcontrib>Colbert, James</creatorcontrib><creatorcontrib>Teplitz, Harry I.</creatorcontrib><creatorcontrib>Siana, Brian</creatorcontrib><creatorcontrib>Scarlata, Claudia</creatorcontrib><creatorcontrib>Rutkowski, Michael</creatorcontrib><creatorcontrib>Mehta, Vihang</creatorcontrib><creatorcontrib>Henry, Alaina</creatorcontrib><creatorcontrib>Dai 戴, Y. Sophia 昱</creatorcontrib><creatorcontrib>Haardt, Francesco</creatorcontrib><creatorcontrib>Bagley, Micaela</creatorcontrib><title>Lyman Continuum Escape Fraction from Low-mass Starbursts at z = 1.3</title><title>The Astrophysical journal</title><description>We present a new constraint on the Lyman continuum (LyC) escape fraction at
. We obtain deep, high sensitivity far-UV imaging with the Advanced Camera for Surveys Solar Blind Channel on the Hubble Space Telescope, targeting 11 star-forming galaxies at 1.2 <
z
< 1.4. The galaxies are selected from the 3D-HST survey to have high H
α
equivalent width (EW) with an EW > 190 Å, low stellar mass (
M
*
< 10
10
M
⊙
), and
U
-band magnitude of
U
< 24.2. These criteria identify young, low metallicity star-bursting populations similar to the early star-forming galaxies believed to have reionized the universe. We do not detect any LyC signal (with a signal-to-noise ratio > 3) in the individual galaxies or in the stack in the far-UV images. We place 3
σ
limits on the relative escape fraction of individual galaxies to be
and a stacked 3
σ
limit of
. Measuring various galaxy properties, including stellar mass, dust attenuation, and star formation rate, we show that our measured values fall within the broad range of values covered by the confirmed LyC emitters from the literature. In particular, we compare the distribution of H
α
and [O
III
] EWs of confirmed LyC emitters and non-detections, including the galaxies in this study. Finally, we discuss if a dichotomy seen in the distribution of H
α
EWs can perhaps distinguish the LyC emitters from the non-detections.</description><subject>Astrophysics</subject><subject>Attenuation</subject><subject>Cosmic dust</subject><subject>Early stars</subject><subject>Emitters</subject><subject>Galaxies</subject><subject>Hubble Space Telescope</subject><subject>Metallicity</subject><subject>Polls & surveys</subject><subject>Signal to noise ratio</subject><subject>Space telescopes</subject><subject>Star & galaxy formation</subject><subject>Star formation</subject><subject>Star formation rate</subject><subject>Stellar mass</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNo9kF1LwzAUhoMoOKf3Xga87pb0tPm48ELGpkLBCxW8C0naQIdtZpIi89fst-yX2TIRXji8h4dz4EHolpIFiIIvaQkiK6DkS21MXcAZmv2vztGMEFJkDPjHJbqKcTvVXMoZWlf7Tvd45fvU9sPQ4XW0etfgTdA2tb7HLvgOV_4763SM-DXpYIYQU8Q64Z_j4f54oAu4RhdOf8bm5m_O0ftm_bZ6yqqXx-fVQ5VZ4DJl3JoaBIfSCGk1FcwIZ8pGGM1qRnMNzNIxWlrJKW8k1DmnjoBxMq8ddzBHd6e7u-C_hiYmtfVD6MeXKi8YMJEDIyNFTpQNPsbQOLULbafDXlGiJllqMqMmM-okC34B_L5eBg</recordid><startdate>20201101</startdate><enddate>20201101</enddate><creator>Alavi, Anahita</creator><creator>Colbert, James</creator><creator>Teplitz, Harry I.</creator><creator>Siana, Brian</creator><creator>Scarlata, Claudia</creator><creator>Rutkowski, Michael</creator><creator>Mehta, Vihang</creator><creator>Henry, Alaina</creator><creator>Dai 戴, Y. Sophia 昱</creator><creator>Haardt, Francesco</creator><creator>Bagley, Micaela</creator><general>IOP Publishing</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>8FD</scope><scope>H8D</scope><scope>KL.</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-7064-5424</orcidid><orcidid>https://orcid.org/0000-0002-8630-6435</orcidid><orcidid>https://orcid.org/0000-0001-7016-5220</orcidid><orcidid>https://orcid.org/0000-0001-7166-6035</orcidid><orcidid>https://orcid.org/0000-0002-9921-9218</orcidid><orcidid>https://orcid.org/0000-0002-9136-8876</orcidid><orcidid>https://orcid.org/0000-0002-7928-416X</orcidid><orcidid>https://orcid.org/0000-0002-6586-4446</orcidid><orcidid>https://orcid.org/0000-0003-3291-3704</orcidid><orcidid>https://orcid.org/0000-0002-4935-9511</orcidid></search><sort><creationdate>20201101</creationdate><title>Lyman Continuum Escape Fraction from Low-mass Starbursts at z = 1.3</title><author>Alavi, Anahita ; Colbert, James ; Teplitz, Harry I. ; Siana, Brian ; Scarlata, Claudia ; Rutkowski, Michael ; Mehta, Vihang ; Henry, Alaina ; Dai 戴, Y. Sophia 昱 ; Haardt, Francesco ; Bagley, Micaela</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c379t-7cbd38735b89ca186b8fb5e8ba6d612a36c16c1a9c9717e93d271f03bf92df7f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Astrophysics</topic><topic>Attenuation</topic><topic>Cosmic dust</topic><topic>Early stars</topic><topic>Emitters</topic><topic>Galaxies</topic><topic>Hubble Space Telescope</topic><topic>Metallicity</topic><topic>Polls & surveys</topic><topic>Signal to noise ratio</topic><topic>Space telescopes</topic><topic>Star & galaxy formation</topic><topic>Star formation</topic><topic>Star formation rate</topic><topic>Stellar mass</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Alavi, Anahita</creatorcontrib><creatorcontrib>Colbert, James</creatorcontrib><creatorcontrib>Teplitz, Harry I.</creatorcontrib><creatorcontrib>Siana, Brian</creatorcontrib><creatorcontrib>Scarlata, Claudia</creatorcontrib><creatorcontrib>Rutkowski, Michael</creatorcontrib><creatorcontrib>Mehta, Vihang</creatorcontrib><creatorcontrib>Henry, Alaina</creatorcontrib><creatorcontrib>Dai 戴, Y. 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Sophia 昱</au><au>Haardt, Francesco</au><au>Bagley, Micaela</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Lyman Continuum Escape Fraction from Low-mass Starbursts at z = 1.3</atitle><jtitle>The Astrophysical journal</jtitle><date>2020-11-01</date><risdate>2020</risdate><volume>904</volume><issue>1</issue><spage>59</spage><pages>59-</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><abstract>We present a new constraint on the Lyman continuum (LyC) escape fraction at
. We obtain deep, high sensitivity far-UV imaging with the Advanced Camera for Surveys Solar Blind Channel on the Hubble Space Telescope, targeting 11 star-forming galaxies at 1.2 <
z
< 1.4. The galaxies are selected from the 3D-HST survey to have high H
α
equivalent width (EW) with an EW > 190 Å, low stellar mass (
M
*
< 10
10
M
⊙
), and
U
-band magnitude of
U
< 24.2. These criteria identify young, low metallicity star-bursting populations similar to the early star-forming galaxies believed to have reionized the universe. We do not detect any LyC signal (with a signal-to-noise ratio > 3) in the individual galaxies or in the stack in the far-UV images. We place 3
σ
limits on the relative escape fraction of individual galaxies to be
and a stacked 3
σ
limit of
. Measuring various galaxy properties, including stellar mass, dust attenuation, and star formation rate, we show that our measured values fall within the broad range of values covered by the confirmed LyC emitters from the literature. In particular, we compare the distribution of H
α
and [O
III
] EWs of confirmed LyC emitters and non-detections, including the galaxies in this study. Finally, we discuss if a dichotomy seen in the distribution of H
α
EWs can perhaps distinguish the LyC emitters from the non-detections.</abstract><cop>Philadelphia</cop><pub>IOP Publishing</pub><doi>10.3847/1538-4357/abbd43</doi><orcidid>https://orcid.org/0000-0002-7064-5424</orcidid><orcidid>https://orcid.org/0000-0002-8630-6435</orcidid><orcidid>https://orcid.org/0000-0001-7016-5220</orcidid><orcidid>https://orcid.org/0000-0001-7166-6035</orcidid><orcidid>https://orcid.org/0000-0002-9921-9218</orcidid><orcidid>https://orcid.org/0000-0002-9136-8876</orcidid><orcidid>https://orcid.org/0000-0002-7928-416X</orcidid><orcidid>https://orcid.org/0000-0002-6586-4446</orcidid><orcidid>https://orcid.org/0000-0003-3291-3704</orcidid><orcidid>https://orcid.org/0000-0002-4935-9511</orcidid><oa>free_for_read</oa></addata></record> |
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subjects | Astrophysics Attenuation Cosmic dust Early stars Emitters Galaxies Hubble Space Telescope Metallicity Polls & surveys Signal to noise ratio Space telescopes Star & galaxy formation Star formation Star formation rate Stellar mass |
title | Lyman Continuum Escape Fraction from Low-mass Starbursts at z = 1.3 |
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