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dc.creatorRobaina, Aday R.en_US
dc.creatorBell, Eric F.en_US
dc.creatorSkelton, Rosalind E.en_US
dc.creatorMcIntosh, Daniel H.en_US
dc.creatorSomerville, Rachel S.en_US
dc.creatorZheng, Xianzhongen_US
dc.creatorRix, Hans-Walteren_US
dc.creatorBacon, Daviden_US
dc.creatorBalogh, Michaelen_US
dc.creatorBarazza, Fabio D.en_US
dc.creatorBarden, Marcoen_US
dc.creatorBoehm, Asmusen_US
dc.creatorCaldwell, John A. R.en_US
dc.creatorGallazzi, Annaen_US
dc.creatorGray, Meghan E.en_US
dc.creatorHaeussler, Borisen_US
dc.creatorHeymans, Catherineen_US
dc.creatorJahnke, Knuden_US
dc.creatorJogee, Shardhaen_US
dc.creatorvan Kampen, Eelcoen_US
dc.creatorLane, Kyleen_US
dc.creatorMeisenheimer, Klausen_US
dc.creatorPapovich, Caseyen_US
dc.creatorPeng, Chien Y.en_US
dc.creatorSanchez, Sebastian F.en_US
dc.creatorSkibba, Raminen_US
dc.creatorTaylor, Andyen_US
dc.creatorWisotzki, Lutzen_US
dc.creatorWolf, Christianen_US
dc.date.accessioned2016-04-28T19:36:17Z
dc.date.available2016-04-28T19:36:17Z
dc.date.issued2009-10en
dc.identifierdoi:10.15781/T23513
dc.identifier.citationRobaina Aday, R., F. Bell Eric, E. Skelton Rosalind, and Xianzhong Zheng. "Less Than 10 Percent Of Star Formation In Z Similar To 0.6 Massive Galaxies Is Triggered By Major Interactions." (Oct., 2009)en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/2152/34880
dc.description.abstractBoth observations and simulations show that major tidal interactions or mergers between gas-rich galaxies can lead to intense bursts of star formation. Yet, the average enhancement in star formation rate (SFR) in major mergers and the contribution of such events to the cosmic SFR are not well estimated. Here we use photometric redshifts, stellar masses, and UV SFRs from COMBO-17, 24 mu m SFRs from Spitzer, and morphologies from two deep Hubble Space Telescope (HST) cosmological survey fields (ECDFS/GEMS and A901/STAGES) to study the enhancement in SFR as a function of projected galaxy separation. We apply two-point projected correlation function techniques, which we augment with morphologically selected very close pairs (separation <2 '') and merger remnants from the HST imaging. Our analysis confirms that the most intensely star-forming systems are indeed interacting or merging. Yet, for massive (M(*) >= 10(10) M(circle dot)) star-forming galaxies at 0.4 < z < 0.8, we find that the SFRs of galaxies undergoing a major interaction (mass ratios <= 1:4 and separations <= 40 kpc) are only 1.80 +/- 0.30 times higher than the SFRs of non-interacting galaxies when averaged over all interactions and all stages of the interaction, in good agreement with other observational works. Our results also agree with hydrodynamical simulations of galaxy interactions, which produce some mergers with large bursts of star formation on similar to 100 Myr timescales, but only a modest SFR enhancement when averaged over the entire merger timescale. We demonstrate that these results imply that only less than or similar to 10% of star formation at 0.4 <= z <= 0.8 is triggered directly by major mergers and interactions; these events are not important factors in the build-up of stellar mass since z = 1.en_US
dc.description.sponsorshipDeutsche Forschungsgemeinschaft's Emmy Noether Programmeen_US
dc.description.sponsorshipSTFCen_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.subjectgalaxies: evolutionen_US
dc.subjectgalaxies: generalen_US
dc.subjectgalaxies: interactionsen_US
dc.subjectgalaxies: starbursten_US
dc.subjectgalaxies: statisticsen_US
dc.subjectinfrared: galaxiesen_US
dc.subjectultraluminous infrared galaxiesen_US
dc.subjectspectral energy-distributionsen_US
dc.subjectactiveen_US
dc.subjectgalactic nucleien_US
dc.subjecthubble-space-telescopeen_US
dc.subjecthigh-redshift galaxiesen_US
dc.subjectdeepen_US
dc.subjectfield-southen_US
dc.subjectx-ray-emissionen_US
dc.subjectformation historyen_US
dc.subjectforming galaxiesen_US
dc.subjectstellar massen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleLess Than 10 Percent Of Star Formation In Z Similar To 0.6 Massive Galaxies Is Triggered By Major Interactionsen_US
dc.typeArticleen_US
dc.description.departmentAstronomyen_US
dc.identifier.Filename2009_10_10percentstarformation.pdfen_US
dc.rights.restrictionOpenen_US
dc.identifier.doi10.1088/0004-637x/704/1/324en_US
dc.contributor.utaustinauthorJogee, Shardhaen_US
dc.relation.ispartofserialAstrophysical Journalen_US


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