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dc.contributor.authorVargas, Carlos J.
dc.contributor.authorWalterbos, René A. M.
dc.contributor.authorRand, Richard J.
dc.contributor.authorStil, Jeroen
dc.contributor.authorKrause, Marita
dc.contributor.authorLi, Jiang-Tao
dc.contributor.authorIrwin, Judith
dc.contributor.authorDettmar, Ralf-Jürgen
dc.date.accessioned2019-09-19T01:41:52Z
dc.date.available2019-09-19T01:41:52Z
dc.date.issued2019-08-08
dc.identifier.citationCarlos J. Vargas et al 2019 ApJ 881 26en_US
dc.identifier.issn0004-637X
dc.identifier.doi10.3847/1538-4357/ab27cb
dc.identifier.urihttp://hdl.handle.net/10150/634490
dc.description.abstractWe present new narrow-band H alpha imaging for 24 nearby edge-on galaxies in the Continuum Halos in Nearby Galaxies-an EVLA Survey (CHANG-ES). We use the images in conjunction with the Wide-field Infrared Survey Explorer 22 mu m imaging of the sample to estimate improved star formation rates (SFRs) using the updated recipe from Vargas et al. We explore correlations between the updated star formation properties and radio continuum scale heights, scale lengths, and diameters, measured in Krause et al. We find a newly discovered correlation between SFR and radio scale height that did not exist using mid-infrared (IR) only SFR calibrations. This implies that a mid-IR extinction correction should be applied to SFR calibrations when used in edge-on galaxies, due to attenuation by dust. The updated SFR values also show newly discovered correlations with radio scale length and radio diameter, implying that the previously measured relationship between radio scale height and radio diameter originates from star formation within the disk. We also identify a region of star formation located at extreme distance from the disk of NGC 4157, possibly ionized by a single O5.5 V star. This region is spatially coincident with an extended ultraviolet disk feature, as traced by the Galaxy Evolution Explorer near-ultraviolet imaging. We theorize that the star formation feature arose due to gravitational instability within gas from an accretion event. New H alpha images from this work can be found at the CHANG-ES data release website. https://www.queensu.ca/changes.en_US
dc.description.sponsorshipNational Science Foundation Graduate Research Fellowship [127229]; National Science Foundation [T-0908126, AST-1615594, AST 1616513]en_US
dc.language.isoenen_US
dc.publisherIOP PUBLISHING LTDen_US
dc.rightsCopyright © 2019. The American Astronomical Society. All rights reserved.en_US
dc.subjectgalaxies: evolutionen_US
dc.subjectgalaxies: ISMen_US
dc.subjectgalaxies: spiralen_US
dc.subjectgalaxies: star formationen_US
dc.titleCHANG-ES. XVII. Hα Imaging of Nearby Edge-on Galaxies, New SFRs, and an Extreme Star Formation Region—Data Release 2en_US
dc.typeArticleen_US
dc.contributor.departmentUniv Arizona, Dept Astronen_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.volume881
dc.source.issue1
dc.source.beginpage26
refterms.dateFOA2019-09-19T01:41:52Z


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