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dc.contributor.authorMicheva, Genoveva
dc.contributor.authorOey, M. S.
dc.contributor.authorKeenan, Ryan P.
dc.contributor.authorJaskot, Anne E.
dc.contributor.authorJames, Bethan L.
dc.date.accessioned2019-02-18T21:26:01Z
dc.date.available2019-02-18T21:26:01Z
dc.date.issued2018-11-01
dc.identifier.citationGenoveva Micheva et al 2018 ApJ 867 2en_US
dc.identifier.issn1538-4357
dc.identifier.doi10.3847/1538-4357/aae372
dc.identifier.urihttp://hdl.handle.net/10150/631719
dc.description.abstractLow-redshift, spatially resolved Lyman continuum (LyC) emitters allow us to clarify the processes for LyC escape from these starburst galaxies. We use Hubble Space Telescope (HST) WFC3 and ACS imaging of the confirmed low-redshift LyC emitter Tol 1247-232 to study the ionization structure of the gas and its relation to the ionizing star clusters. We perform ionization parameter mapping (IPM) using [O III] lambda lambda 4959, 5007 and [O II] lambda 3727 imaging as the high-and low-ionization tracers, revealing broad, large-scale, optically thin regions originating from the center and reaching the outskirts of the galaxy, consistent with LyC escape. We carry out stellar population synthesis modeling of the 26 brightest clusters using our HST photometry. Combining these data with the nebular photometry, we find a global LyC escape fraction of f(esc) = 0.12, with uncertainties also consistent with zero escape and all measured f(esc) values for this galaxy. Our analysis suggests that, similar to other candidate LyC emitters, a two-stage starburst has taken place in this galaxy, with a 12 Myr old, massive central cluster likely having precleared regions in and around the center and the second generation of 2-4 Myr old clusters dominating the current ionization, including some escape from the galaxy.en_US
dc.description.sponsorshipNASA [HST-GO-13702]; University of Michiganen_US
dc.language.isoenen_US
dc.publisherIOP PUBLISHING LTDen_US
dc.relation.urlhttp://stacks.iop.org/0004-637X/867/i=1/a=2?key=crossref.64f8ae14e0be834013043956bb1eec46en_US
dc.rights© 2018. The American Astronomical Society. All rights reserved.en_US
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectgalaxies: evolutionen_US
dc.subjectgalaxies: individual (Tol 1247-232)en_US
dc.subjectgalaxies: star clusters: generalen_US
dc.subjectgalaxies: starbursten_US
dc.subjectintergalactic mediumen_US
dc.titleMapping Lyman Continuum Escape in Tololo 1247–232en_US
dc.typeArticleen_US
dc.contributor.departmentUniv Arizona, Steward Observen_US
dc.identifier.journalASTROPHYSICAL JOURNALen_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
dc.source.journaltitleThe Astrophysical Journal
dc.source.volume867
dc.source.issue1
dc.source.beginpage2
refterms.dateFOA2019-02-18T21:26:02Z


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