Effects Of Large-Scale Environment On The Assembly History Of Central Galaxies

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dc.contributor.utaustinauthorJung, Intaeen_US
dc.creatorJung, Intaeen_US
dc.creatorLee, Jaehyunen_US
dc.creatorYi, Sukyoung K.en_US
dc.date.accessioned2016-04-28T19:39:52Z
dc.date.available2016-04-28T19:39:52Z
dc.date.issued2014-10en
dc.description.abstractWe examine whether large-scale environment affects the mass assembly history of central galaxies. To facilitate this, we constructed dark matter halo merger trees from a cosmological N-body simulation and calculated the formation and evolution of galaxies using a semi-analytic method. We confirm earlier results that smaller halos show a notable difference in formation time with a mild dependence on large-scale environment. However, using a semi-analytic model, we found that on average the growth rate of the stellar mass of central galaxies is largely insensitive to large-scale environment. Although our results show that the star formation rate (SFR) and the stellar mass of central galaxies in smaller halos are slightly affected by the assembly bias of halos, those galaxies are faint and the difference in the SFR is minute, therefore it is challenging to detect it in real galaxies given the current observational accuracy. Future galaxy surveys, such as the BigBOSS experiment and the Large Synoptic Survey Telescope, which are expected to provide observational data for fainter objects, will provide a chance to test our model predictions.en_US
dc.description.departmentAstronomyen_US
dc.description.sponsorshipNational Research Foundation of Korea Doyak FY2014en_US
dc.identifierdoi:10.15781/T2Q23D
dc.identifier.Filename2014_10_effectslargescale.pdfen_US
dc.identifier.citationJung, Intae, Jaehyun Lee, and K. Yi Sukyoung. "Effects of large-scale environment on the assembly history of central galaxies." The Astrophysical Journal, Vol. 794, No. 1 (Oct., 2014): 74.en_US
dc.identifier.doi10.1088/0004-637x/794/1/74en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/2152/35061
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: halosen_US
dc.subjectlarge-scale structure of universeen_US
dc.subjectmethods: numericalen_US
dc.subjectdark-matter haloesen_US
dc.subjectcosmological simulationsen_US
dc.subjectmillennium simulationen_US
dc.subjectformation timesen_US
dc.subjectage-dependenceen_US
dc.subjectstar-formationen_US
dc.subjectmerger rateen_US
dc.subjectbiasen_US
dc.subjectmassen_US
dc.subjectaccretionen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleEffects Of Large-Scale Environment On The Assembly History Of Central Galaxiesen_US
dc.typeArticleen_US

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