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GALACTIC ANGULAR MOMENTUM IN THE ILLUSTRIS SIMULATION: FEEDBACK AND THE HUBBLE SEQUENCE

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dc.contributor.author Genel, Shy
dc.contributor.author Fall, S. Michael
dc.contributor.author Hernquist, Lars
dc.contributor.author Vogelsberger, Mark
dc.contributor.author Snyder, Gregory F.
dc.contributor.author Rodriguez-Gomez, Vicente
dc.contributor.author Sijacki, Debora
dc.contributor.author Springel, Volker
dc.date.accessioned 2015-09-08T12:00:07Z
dc.date.available 2015-09-08T12:00:07Z
dc.date.issued 2015-05
dc.date.submitted 2015-03
dc.identifier.issn 2041-8213
dc.identifier.issn 2041-8205
dc.identifier.uri http://hdl.handle.net/1721.1/98374
dc.description.abstract We study the stellar angular momentum of thousands of galaxies in the Illustris cosmological simulation, which captures gravitational and gas dynamics within galaxies, as well as feedback from stars and black holes. We find that the angular momentum of the simulated galaxies matches observations well, and in particular two distinct relations are found for late-type versus early-type galaxies. The relation for late-type galaxies corresponds to the value expected from full conservation of the specific angular momentum generated by cosmological tidal torques. The relation for early-type galaxies corresponds to retention of only ~30% of that, but we find that those early-type galaxies with low angular momentum at z = 0 nevertheless reside at high redshift on the late-type relation. Some of them abruptly lose angular momentum during major mergers. To gain further insight, we explore the scaling relations in simulations where the galaxy formation physics is modified with respect to the fiducial model. We find that galactic winds with high mass-loading factors are essential for obtaining the high angular momentum relation typical for late-type galaxies, while active galactic nucleus feedback largely operates in the opposite direction. Hence, feedback controls the stellar angular momentum of galaxies, and appears to be instrumental for establishing the Hubble sequence. en_US
dc.language.iso en_US
dc.publisher IOP Publishing en_US
dc.relation.isversionof http://dx.doi.org/10.1088/2041-8205/804/2/l40 en_US
dc.rights Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. en_US
dc.source IOP Publishing en_US
dc.title GALACTIC ANGULAR MOMENTUM IN THE ILLUSTRIS SIMULATION: FEEDBACK AND THE HUBBLE SEQUENCE en_US
dc.type Article en_US
dc.identifier.citation Genel, Shy, S. Michael Fall, Lars Hernquist, Mark Vogelsberger, Gregory F. Snyder, Vicente Rodriguez-Gomez, Debora Sijacki, and Volker Springel. “GALACTIC ANGULAR MOMENTUM IN THE ILLUSTRIS SIMULATION: FEEDBACK AND THE HUBBLE SEQUENCE.” The Astrophysical Journal 804, no. 2 (May 10, 2015): L40. © 2015 The American Astronomical Society en_US
dc.contributor.department Massachusetts Institute of Technology. Department of Physics en_US
dc.contributor.department Kavli Institute for Astrophysics and Space Research en_US
dc.contributor.mitauthor Vogelsberger, Mark en_US
dc.relation.journal The Astrophysical Journal. Letters en_US
dc.identifier.mitlicense PUBLISHER_POLICY en_US
dc.eprint.version Final published version en_US
dc.type.uri http://purl.org/eprint/type/JournalArticle en_US
eprint.status http://purl.org/eprint/status/PeerReviewed en_US
dspace.orderedauthors Genel, Shy; Fall, S. Michael; Hernquist, Lars; Vogelsberger, Mark; Snyder, Gregory F.; Rodriguez-Gomez, Vicente; Sijacki, Debora; Springel, Volker en_US
dc.identifier.orcid https://orcid.org/0000-0001-8593-7692


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