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dc.creatorJogee, Shardhaen_US
dc.creatorMiller, Sarah H.en_US
dc.creatorPenner, Kyleen_US
dc.creatorSkelton, Rosalind E.en_US
dc.creatorConselice, Christopher J.en_US
dc.creatorSomerville, Rachel S.en_US
dc.creatorBell, Eric F.en_US
dc.creatorZheng, Xian Zhongen_US
dc.creatorRix, Hans-Walteren_US
dc.creatorRobaina, Aday R.en_US
dc.creatorBarazza, Fabio D.en_US
dc.creatorBarden, Marcoen_US
dc.creatorBorch, Andreaen_US
dc.creatorBeckwith, Steven V. W.en_US
dc.creatorCaldwell, John A. R.en_US
dc.creatorPeng, Chien Y.en_US
dc.creatorHeymans, Catherineen_US
dc.creatorMcIntosh, Daniel H.en_US
dc.creatorHaeussler, Borisen_US
dc.creatorJahnke, Knuden_US
dc.creatorMeisenheimer, Klausen_US
dc.creatorSanchez, Sebastian F.en_US
dc.creatorWisotzki, Lutzen_US
dc.creatorWolf, Christianen_US
dc.creatorPapovich, Caseyen_US
dc.date.accessioned2016-04-28T19:37:30Z
dc.date.available2016-04-28T19:37:30Z
dc.date.issued2009-06en
dc.identifierdoi:10.15781/T2Z53M
dc.identifier.citationJogee, Shardha, Sarah H. Miller, Kyle Penner, Rosalind E. Skelton, Christopher J. Conselice, Rachel S. Somerville, Eric F. Bell et al. "History of Galaxy Interactions and Their Impact on Star Formation Over the Last 7 Gyr from GEMS." The Astrophysical Journal, Vol. 697, No. 2 (Jun., 2009): 1971.en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/2152/34943
dc.description.abstractWe perform a comprehensive estimate of the frequency of galaxy mergers and their impact on star formation over z similar to 0.24-0.80 (lookback time T(b) similar to 3-7 Gyr) using similar to 3600 (M >= 1 x 10(9) M(circle dot)) galaxies with GEMS Hubble Space Telescope, COMBO-17, and Spitzer data. Our results are as follows. (1) Among similar to 790 high-mass (M >= 2.5 x 10(10) M(circle dot)) galaxies, the visually based merger fraction over z similar to 0.24-0.80, ranges from 9% +/- 5% to 8% +/- 2%. Lower limits on the major merger and minor merger fraction over this interval range from 1.1% to 3.5%, and 3.6% to 7.5%, respectively. This is the first, albeit approximate, empirical estimate of the frequency of minor mergers over the last 7 Gyr. Assuming a visibility timescale of similar to 0.5 Gyr, it follows that over T(b) similar to 3-7 Gyr, similar to 68% of high-mass systems have undergone a merger of mass ratio > 1/10, with similar to 16%, 45%, and 7% of these corresponding respectively to major, minor, and ambiguous "major or minor" mergers. The average merger rate is similar to a few x 10(-4) galaxies Gyr(-1) Mpc(-3). Among similar to 2840 blue-cloud galaxies of mass M >= 1.0 x 10(9) M(circle dot), similar results hold. (2) We compare the empirical merger fraction and merger rate for high-mass galaxies to three. cold dark matter-based models: halo occupation distribution models, semi-analytic models, and hydrodynamic SPH simulations. We find qualitative agreement between observations and models such that the (major+minor) merger fraction or rate from different models bracket the observations, and show a factor of 5 dispersion. Near-future improvements can now start to rule out certain merger scenarios. (3) Among similar to 3698 M >= 1.0 x 10(9) M(circle dot) galaxies, we find that the mean star formation rate (SFR) of visibly merging systems is only modestly enhanced compared to non-interacting galaxies over z similar to 0.24-0.80. Visibly merging systems only account for a small fraction (< 30%) of the cosmic SFR density over T(b) similar to 3-7 Gyr. This complements the results of Wolf et al. over a shorter time interval of T(b) similar to 6.2-6.8 Gyr, and suggests that the behavior of the cosmic SFR density over the last 7 Gyr is predominantly shaped by non-interacting galaxies.en_US
dc.description.sponsorshipNational Aeronautics and Space Administration (NASA) NAG5-13063, NAS5-26555, NAG5-13102en_US
dc.description.sponsorshipNSF AST-0607748en_US
dc.description.sponsorshipSTScI G0-10395en_US
dc.description.sponsorshipDeutsche Forschungsgemeinschaften_US
dc.description.sponsorshipNSFC 10773030, 10833006en_US
dc.description.sponsorshipNRC-HIAen_US
dc.description.sponsorshipSTFCen_US
dc.description.sponsorshipSpace Telescope Science Institute GO-9500en_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: fundamental parametersen_US
dc.subjectgalaxies:en_US
dc.subjectkinematics and dynamicsen_US
dc.subjectgalaxies: structureen_US
dc.subjectdeep-field-southen_US
dc.subjectdark-matter haloesen_US
dc.subjectmultiband imaging photometeren_US
dc.subjectactive galactic nucleien_US
dc.subjectfrance redshift surveyen_US
dc.subjectpoint-source catalogsen_US
dc.subjectinitial mass functionen_US
dc.subjectelliptic galaxiesen_US
dc.subjectformation ratesen_US
dc.subjectstellar massen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleHistory Of Galaxy Interactions And Their Impact On Star Formation Over The Last 7 Gyr From GEMSen_US
dc.typeReviewen_US
dc.description.departmentAstronomyen_US
dc.identifier.Filename2009_06_galaxyinteractions.pdfen_US
dc.rights.restrictionOpenen_US
dc.identifier.doi10.1088/0004-637x/697/2/1971en_US
dc.contributor.utaustinauthorJogee, Shardhaen_US
dc.contributor.utaustinauthorMiller, Sarah H.en_US
dc.contributor.utaustinauthorPenner, Kyleen_US
dc.relation.ispartofserialAstrophysical Journalen_US


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