Obscured Star Formation In Intermediate-Density Environments: A Spitzer Study Of The Abell 901/902 Supercluster

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dc.contributor.utaustinauthorJogee, Shardhaen_US
dc.creatorGallazzi, Annaen_US
dc.creatorBell, Eric F.en_US
dc.creatorWolf, Christianen_US
dc.creatorGray, Meghan E.en_US
dc.creatorPapovich, Caseyen_US
dc.creatorBarden, Marcoen_US
dc.creatorPeng, Chien Y.en_US
dc.creatorMeisenheimer, Klausen_US
dc.creatorHeymans, Catherineen_US
dc.creatorvan Kampen, Eelcoen_US
dc.creatorGilmour, Rachelen_US
dc.creatorBalogh, Michaelen_US
dc.creatorMcIntosh, Daniel H.en_US
dc.creatorBacon, Daviden_US
dc.creatorBarazza, Fabio D.en_US
dc.creatorBoehm, Asmusen_US
dc.creatorCaldwell, John A. R.en_US
dc.creatorHaeussler, Borisen_US
dc.creatorJahnke, Knuden_US
dc.creatorJogee, Shardhaen_US
dc.creatorLane, Kyleen_US
dc.creatorRobaina, Aday R.en_US
dc.creatorSanchez, Sebastian F.en_US
dc.creatorTaylor, Andyen_US
dc.creatorWisotzki, Lutzen_US
dc.creatorZheng, Xianzhongen_US
dc.date.accessioned2016-04-28T19:34:23Z
dc.date.available2016-04-28T19:34:23Z
dc.date.issued2009-01en
dc.description.abstractWe explore the amount of obscured star formation as a function of environment in the Abell 901/902 (A901/902) supercluster at z = 0.165 in conjunction with a field sample drawn from the A901 and CDFS fields, imaged with the Hubble Space Telescope as part of the Space Telescope A901/902 Galaxy Evolution Survey and Galaxy Evolution from Morphology and Spectral Energy Distributions (SEDs) Survey. We combine the combo-17 near-UV/optical SED with Spitzer 24 mu m photometry to estimate both the unobscured and obscured star formation in galaxies with M(*) > 10(10) M(circle dot). We find that the star formation activity in massive galaxies is suppressed in dense environments, in agreement with previous studies. Yet, nearly 40% of the star-forming (SF) galaxies have red optical colors at intermediate and high densities. These red systems are not starbursting; they have star formation rates (SFRs) per unit stellar mass similar to or lower than blue SF galaxies. More than half of the red SF galaxies have low infrared-to-ultraviolet (IR-to-UV) luminosity ratios, relatively high Sersicindices, and they are equally abundant at all densities. They might be gradually quenching their star formation, possibly but not necessarily under the influence of gas-removing environmental processes. The other greater than or similar to 40% of the red SF galaxies have high IR-to-UV luminosity ratios, indicative of high dust obscuration. They have relatively high specific SFRs and are more abundant at intermediate densities. Our results indicate that while there is an overall suppression in the SF galaxy fraction with density, the small amount of star formation surviving the cluster environment is to a large extent obscured, suggesting that environmental interactions trigger a phase of obscured star formation, before complete quenching.en_US
dc.description.departmentAstronomyen_US
dc.description.sponsorshipDeutsche Forschungsgemeinschaften_US
dc.description.sponsorshipAnne McLaren Research Fellowshipen_US
dc.description.sponsorshipAustrian Science Foundation P18416en_US
dc.description.sponsorshipSTScIen_US
dc.description.sponsorshipNRC-HIA Fellowshipen_US
dc.description.sponsorshipEuropean Commission Programme Sixth Framework Marie Curie Outgoing International Fellowship MOIF-CT-200621891en_US
dc.description.sponsorshipCITA National Fellowshipen_US
dc.description.sponsorshipNational Aeronautics and Space Administration (NASA) NAG5-13102, NAG5-13063, GO-10395en_US
dc.description.sponsorshipDLR 50 OR 0404en_US
dc.description.sponsorshipNSF AST-0607748en_US
dc.description.sponsorshipMEC AYA2005-09413-C02-02en_US
dc.description.sponsorshipJunta de Andalucia FQM322en_US
dc.description.sponsorshipAURA NAS5-26555en_US
dc.identifierdoi:10.15781/T24J8V
dc.identifier.Filename2009_01_abell901.pdfen_US
dc.identifier.citationGallazzi, Anna, Eric F. Bell, Christian Wolf, Meghan E. Gray, Casey Papovich, Marco Barden, Chien Y. Peng et al. "Obscured star formation in intermediate-density environments: A Spitzer study of the Abell 901/902 supercluster." The Astrophysical Journal, Vol. 690, No. 2 (Jan., 2009): 1883.en_US
dc.identifier.doi10.1088/0004-637x/690/2/1883en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/2152/34779
dc.language.isoEnglishen_US
dc.relation.ispartofen_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.rights.restrictionOpenen_US
dc.subjectgalaxies: evolutionen_US
dc.subjectgalaxies: generalen_US
dc.subjectgalaxies: stellar contenten_US
dc.subjecthubble-space-telescopeen_US
dc.subjectearly-type galaxiesen_US
dc.subjectspectralen_US
dc.subjectenergy-distributionsen_US
dc.subjectalpha surface photometryen_US
dc.subjectactive galactic nucleien_US
dc.subjectdigital sky surveyen_US
dc.subjectdark-matter halosen_US
dc.subjectvirgo clusteren_US
dc.subjectspiral galaxiesen_US
dc.subjectstellar massen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleObscured Star Formation In Intermediate-Density Environments: A Spitzer Study Of The Abell 901/902 Superclusteren_US
dc.typeReviewen_US

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