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The SAMI Galaxy Survey: The link between angular momentum and optical morphology

Cortese, L; Fogarty, Lisa M R; Bekki, Kenji; van de Sande, J; Couch, Warrick; Catinella, B; Colless, Matthew; Obreschkow, Danail; Taranu, Dan S; Tescari, Edoardo; Barat, Dilyar; D'Eugenio, Francesco; Ho, I-Ting; Medling, Anne; Sharp, Robert; Sweet, Sarah; Owers, M S

Description

We investigate the relationship between stellar and gas specific angular momentum j, stellar massM* and optical morphology for a sample of 488 galaxies extracted from the Sydney-AAO Multi-object Integral field Galaxy Survey.We find that j, measured within one effective radius, monotonically increases with M* and that, for M* > 109.5 M⊙, the scatter in this relation strongly correlates with optical morphology (i.e. visual classification and Sérsic index). These findings confirm that massive...[Show more]

dc.contributor.authorCortese, L
dc.contributor.authorFogarty, Lisa M R
dc.contributor.authorBekki, Kenji
dc.contributor.authorvan de Sande, J
dc.contributor.authorCouch, Warrick
dc.contributor.authorCatinella, B
dc.contributor.authorColless, Matthew
dc.contributor.authorObreschkow, Danail
dc.contributor.authorTaranu, Dan S
dc.contributor.authorTescari, Edoardo
dc.contributor.authorBarat, Dilyar
dc.contributor.authorD'Eugenio, Francesco
dc.contributor.authorHo, I-Ting
dc.contributor.authorMedling, Anne
dc.contributor.authorSharp, Robert
dc.contributor.authorSweet, Sarah
dc.contributor.authorOwers, M S
dc.date.accessioned2018-11-29T22:53:27Z
dc.date.available2018-11-29T22:53:27Z
dc.identifier.issn0035-8711
dc.identifier.urihttp://hdl.handle.net/1885/152479
dc.description.abstractWe investigate the relationship between stellar and gas specific angular momentum j, stellar massM* and optical morphology for a sample of 488 galaxies extracted from the Sydney-AAO Multi-object Integral field Galaxy Survey.We find that j, measured within one effective radius, monotonically increases with M* and that, for M* > 109.5 M⊙, the scatter in this relation strongly correlates with optical morphology (i.e. visual classification and Sérsic index). These findings confirm that massive galaxies of all types lie on a plane relating mass, angular momentum and stellar-light distribution, and suggest that the large-scale morphology of a galaxy is regulated by its mass and dynamical state. We show that the significant scatter in the M*-j relation is accounted for by the fact that, at fixed stellar mass, the contribution of ordered motions to the dynamical support of galaxies varies by at least a factor of 3. Indeed, the stellar spin parameter (quantified via λR) correlates strongly with Sérsic and concentration indices. This correlation is particularly strong once slow rotators are removed from the sample, showing that late-type galaxies and early-type fast rotators form a continuous class of objects in terms of their kinematic properties.
dc.format.mimetypeapplication/pdf
dc.publisherBlackwell Publishing Ltd
dc.sourceMonthly Notices of the Royal Astronomical Society
dc.titleThe SAMI Galaxy Survey: The link between angular momentum and optical morphology
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume463
dc.date.issued2016
local.identifier.absfor020103 - Cosmology and Extragalactic Astronomy
local.identifier.ariespublicationa383154xPUB5676
local.type.statusPublished Version
local.contributor.affiliationCortese, L, University of Western Australia
local.contributor.affiliationFogarty, Lisa M R, University of Sydney
local.contributor.affiliationBekki, Kenji, University of Western Australia
local.contributor.affiliationvan de Sande, J, University of Sydney
local.contributor.affiliationCouch, Warrick, Australian Astronomical Observatory
local.contributor.affiliationCatinella, B, The University of Western Australia
local.contributor.affiliationColless, Matthew, College of Science, ANU
local.contributor.affiliationObreschkow, Danail, University of Western Australia
local.contributor.affiliationTaranu, Dan S, University of Western Australia
local.contributor.affiliationTescari, Edoardo, University of Melbourne
local.contributor.affiliationBarat, Dilyar, College of Science, ANU
local.contributor.affiliationD'Eugenio, Francesco, College of Science, ANU
local.contributor.affiliationHo, I-Ting, College of Science, ANU
local.contributor.affiliationMedling, Anne, College of Science, ANU
local.contributor.affiliationSharp, Robert, College of Science, ANU
local.contributor.affiliationSweet, Sarah, College of Science, ANU
local.contributor.affiliationOwers, M S, Australian Astronomical Observatory
local.bibliographicCitation.issue1
local.identifier.doi10.1093/mnras/stw1891
dc.date.updated2018-11-29T07:52:58Z
local.identifier.scopusID2-s2.0-85015668174
local.identifier.thomsonID000386464900013
dcterms.accessRightsOpen Access
CollectionsANU Research Publications

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