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dc.creatorCiardullo, Robinen_US
dc.creatorGronwall, Carylen_US
dc.creatorAdams, Joshua J.en_US
dc.creatorBlanc, Guillermo A.en_US
dc.creatorGebhardt, Karlen_US
dc.creatorFinkelstein, Steven L.en_US
dc.creatorJogee, Shardhaen_US
dc.creatorHill, Gary J.en_US
dc.creatorDrory, Niven_US
dc.creatorHopp, Ulrichen_US
dc.creatorSchneider, Donald P.en_US
dc.creatorZeimann, Gregory R.en_US
dc.creatorDalton, Gavin B.en_US
dc.date.accessioned2016-04-28T19:37:42Z
dc.date.available2016-04-28T19:37:42Z
dc.date.issued2013-05en
dc.identifierdoi:10.15781/T2HZ4W
dc.identifier.citationCiardullo, Robin, Caryl Gronwall, Joshua J. Adams, Guillermo A. Blanc, Karl Gebhardt, Steven L. Finkelstein, Shardha Jogee et al. "The Hetdex Pilot Survey. IV. The evolution of [O II] emitting galaxies from z~ 0.5 to z~ 0." The Astrophysical Journal, Vol. 769, No. 1 (May., 2013): 83.en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/2152/34954
dc.description.abstractWe present an analysis of the luminosities and equivalent widths of the 284 z < 0.56 [O II]-emitting galaxies found in the 169 arcmin(2) pilot survey for the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). By combining emission-line fluxes obtained from the Mitchell spectrograph on the McDonald 2.7 m telescope with deep broadband photometry from archival data, we derive each galaxy's dereddened [O II] lambda 3727 luminosity and calculate its total star formation rate. We show that over the last similar to 5Gyr of cosmic time, there has been substantial evolution in the [O II] emission-line luminosity function, with L* decreasing by similar to 0.6 +/- 0.2 dex in the observed function, and by similar to 0.9 +/- 0.2 dex in the dereddened relation. Accompanying this decline is a significant shift in the distribution of [O II] equivalent widths, with the fraction of high equivalent-width emitters declining dramatically with time. Overall, the data imply that the relative intensity of star formation within galaxies has decreased over the past similar to 5Gyr, and that the star formation rate density of the universe has declined by a factor of similar to 2.5 between z similar to 0.5 and z similar to 0. These observations represent the first [O II]-based star formation rate density measurements in this redshift range, and foreshadow the advancements which will be generated by the main HETDEX survey.en_US
dc.description.sponsorshipCynthia and George Mitchell Foundationen_US
dc.description.sponsorshipNSF AST 09-26641, AST 09-26815en_US
dc.description.sponsorshipInstitute for Gravitationen_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.language.isoEnglishen_US
dc.relation.ispartofen_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: luminosity function, mass functionen_US
dc.subjectstar-formation rateen_US
dc.subjectemission-line galaxiesen_US
dc.subjectlambda-3727 luminosityen_US
dc.subjectfunctionen_US
dc.subjectinfrared cluster surveyen_US
dc.subjectfrance redshift surveyen_US
dc.subjectsubaru deepen_US
dc.subjectfielden_US
dc.subjecth-alphaen_US
dc.subjectformation historyen_US
dc.subjectforming galaxiesen_US
dc.subjectultravioleten_US
dc.subjectastronomy & astrophysicsen_US
dc.titleThe HETDEX Pilot Survey. IV. The Evolution Of O II Emitting Galaxies From Z Similar To 0.5 To Z Similar To 0en_US
dc.typeArticleen_US
dc.description.departmentAstronomyen_US
dc.identifier.Filename2013_03_hetdexpilotsurveyiv.pdfen_US
dc.rights.restrictionOpenen_US
dc.identifier.doi10.1088/0004-637x/769/1/83en_US
dc.contributor.utaustinauthorAdams, Joshua J.en_US
dc.contributor.utaustinauthorBlanc, Guillermo A.en_US
dc.contributor.utaustinauthorGebhardt, Karlen_US
dc.contributor.utaustinauthorFinkelstein, Steven L.en_US
dc.contributor.utaustinauthorJogee, Shardhaen_US
dc.relation.ispartofserialAstrophysical Journalen_US


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