Physical And Morphological Properties Of O II Emitting Galaxies In The HETDEX Pilot Survey

dc.contributor.utaustinauthorDrory, Niven_US
dc.contributor.utaustinauthorGebhardt, Karlen_US
dc.contributor.utaustinauthorJogee, Shardhaen_US
dc.creatorBridge, Joanna S.en_US
dc.creatorGronwall, Carylen_US
dc.creatorCiardullo, Robinen_US
dc.creatorHagen, Alexen_US
dc.creatorZeimann, Gregen_US
dc.creatorMalz, A. I.en_US
dc.creatorAcquaviva, Vivianaen_US
dc.creatorSchneider, Donald P.en_US
dc.creatorDrory, Niven_US
dc.creatorGebhardt, Karlen_US
dc.creatorJogee, Shardhaen_US
dc.description.abstractThe Hobby-Eberly Dark Energy Experiment pilot survey identified 284 [O II] lambda 3727 emitting galaxies in a 169 arcmin(2) field of sky in the redshift range 0 < z < 0.57. This line flux limited sample provides a bridge between studies in the local universe and higher-redshift [O II] surveys. We present an analysis of the star formation rates (SFRs) of these galaxies as a function of stellar mass as determined via spectral energy distribution fitting. The [O II] emitters fall on the "main sequence" of star-forming galaxies with SFR decreasing at lower masses and redshifts. However, the slope of our relation is flatter than that found for most other samples, a result of the metallicity dependence of the [O II] star formation rate indicator. The mass-specific SFR is higher for lower mass objects, supporting the idea that massive galaxies formed more quickly and efficiently than their lower mass counterparts. This is confirmed by the fact that the equivalent widths of the [O II] emission lines trend smaller with larger stellar mass. Examination of the morphologies of the [O II] emitters reveals that their star formation is not a result of mergers, and the galaxies' half-light radii do not indicate evolution of physical sizes.en_US
dc.description.sponsorshipCynthia and George Mitchell Foundationen_US
dc.description.sponsorshipNSF Graduate Research Fellowship Program DGE1255832en_US
dc.description.sponsorshipNSF AST 09-26641en_US
dc.description.sponsorshipEberly College of Scienceen_US
dc.description.sponsorshipOffice of the Senior Vice President for Research at The Pennsylvania State Universityen_US
dc.identifier.citationBridge, Joanna S., Caryl Gronwall, Robin Ciardullo, Alex Hagen, Greg Zeimann, A. I. Malz, Viviana Acquaviva et al. "Physical and Morphological Properties of [O II] Emitting Galaxies in the HETDEX Pilot Survey." The Astrophysical Journal, Vol. 799, No. 2 (Feb., 2015): 205.en_US
dc.relation.ispartofserialAstrophysical Journalen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.subjectcosmology: observationsen_US
dc.subjectgalaxies: evolutionen_US
dc.subjectgalaxies: formationen_US
dc.subjectgalaxies: high-redshiften_US
dc.subjectstar-forming galaxiesen_US
dc.subjectemission-line galaxiesen_US
dc.subjectultraviolet luminosityen_US
dc.subjectdisk galaxiesen_US
dc.subjectdust extinctionen_US
dc.subjectnearby galaxiesen_US
dc.subjectstellar massen_US
dc.subjectdeep fielden_US
dc.subjectastronomy & astrophysicsen_US
dc.titlePhysical And Morphological Properties Of O II Emitting Galaxies In The HETDEX Pilot Surveyen_US

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