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A relation between the characteristic stellar ages of galaxies and their intrinsic shapes

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dc.contributor.authorvan de Sande, J.
dc.contributor.authorScott, Nicholas
dc.contributor.authorBland-Hawthorn, J.
dc.contributor.authorBrough, Sarah
dc.contributor.authorBryant, J. J.
dc.contributor.authorColless, Matthew
dc.contributor.authorCortese, L.
dc.contributor.authorCroom, Scott M.
dc.contributor.authorD'Eugenio, Francesco
dc.contributor.authorFoster, Caroline
dc.contributor.authorGoodwin, Michael
dc.contributor.authorKonstantopoulos, I. S.
dc.contributor.authorMedling, Anne
dc.contributor.authorSharp, Rob
dc.date.accessioned2020-07-08T05:29:25Z
dc.date.issued2018-04-23
dc.date.updated2020-07-06T08:18:09Z
dc.description.abstractStellar population and stellar kinematic studies provide unique but complementary insights into how galaxies build-up their stellar mass and angular momentum1,2,3. A galaxy's mean stellar age reveals when stars were formed, but provides little constraint on how the galaxy's mass was assembled. Resolved stellar dynamics4 trace the change in angular momentum due to mergers, but major mergers tend to obscure the effect of earlier interactions5. With the rise of large multi-object integral field spectroscopic surveys, such as SAMI6 and MaNGA7, and single-object integral field spectroscopic surveys (for example, ATLAS3D (ref. 8), CALIFA9, MASSIVE10), it is now feasible to connect a galaxy′s star formation and merger history on the same resolved physical scales, over a large range in galaxy mass, morphology and environment4,11,12. Using the SAMI Galaxy Survey, here we present a combined study of spatially resolved stellar kinematics and global stellar populations. We find a strong correlation of stellar population age with location in the (V/σ, ϵe) diagram that links the ratio of ordered rotation to random motions in a galaxy to its observed ellipticity. For the large majority of galaxies that are oblate rotating spheroids, we find that characteristic stellar age follows the intrinsic ellipticity of galaxies remarkably well.en_AU
dc.description.sponsorshipThe SAMI Galaxy Survey is based on observations made at the Anglo-Australian Telescope. The Sydney–Australian Astronomical Observatory Multi-object Integral field spectrograph (SAMI) was developed jointly by the University of Sydney and the Australian Astronomical Observatory. The SAMI input catalogue is based on data taken from the Sloan Digital Sky Survey, the GAMA Survey and the VST ATLAS Survey. The SAMI Galaxy Survey is funded by the Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO), through project number CE110001020, and other participating institutions. Parts of this research were conducted by the Australian Research Council Centre of Excellence for All-sky Astrophysics in 3 Dimensions (ASTRO 3D), through project number CE170100013. J.v.d.S. is funded under Bland-Hawthorn′s Australian Research Council Laureate Fellowship (FL140100278). N.S. acknowledges support of a University of Sydney Postdoctoral Research Fellowship. S.B. acknowledges the funding support from the Australian Research Council through a Future Fellowship (FT140101166). M.S.O. acknowledges the funding support from the Australian Research Council through a Future Fellowship (FT140100255).en_AU
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.issn2397-3366en_AU
dc.identifier.urihttp://hdl.handle.net/1885/205941
dc.language.isoen_AUen_AU
dc.provenancehttp://v2.sherpa.ac.uk/id/publication/35033..."Author accepted manuscript can be made open access on institutional repository after 6 month embargo" from SHERPA/RoMEO site (as at 13/7/20).
dc.publisherNature Publishing Groupen_AU
dc.relationhttp://purl.org/au-research/grants/arc/CE1101020en_AU
dc.relationhttp://purl.org/au-research/grants/arc/CE170100013en_AU
dc.relationhttp://purl.org/au-research/grants/arc/FL140100278en_AU
dc.relationhttp://purl.org/au-research/grants/arc/FT140101166en_AU
dc.relationhttp://purl.org/au-research/grants/arc/FT140100255en_AU
dc.rights© 2018 Macmillan Publishers Limited, part of Springer Nature.en_AU
dc.sourceNature Astronomyen_AU
dc.titleA relation between the characteristic stellar ages of galaxies and their intrinsic shapesen_AU
dc.typeJournal articleen_AU
dcterms.accessRightsOpen Access
local.bibliographicCitation.issue6en_AU
local.bibliographicCitation.lastpage488en_AU
local.bibliographicCitation.startpage483en_AU
local.contributor.affiliationvan de Sande, J., University of Sydneyen_AU
local.contributor.affiliationScott, Nicholas, University of Sydneyen_AU
local.contributor.affiliationBland-Hawthorn, J., The University of Sydneyen_AU
local.contributor.affiliationBrough, Sarah, The University of New South Walesen_AU
local.contributor.affiliationBryant, J. J., Australian Astronomical Observatoryen_AU
local.contributor.affiliationColless, Matthew, College of Science, ANUen_AU
local.contributor.affiliationCortese, L., University of Western Australiaen_AU
local.contributor.affiliationCroom, Scott M., University of Sydneyen_AU
local.contributor.affiliationD'Eugenio, Francesco, College of Science, ANUen_AU
local.contributor.affiliationFoster, Caroline , University of Sydneyen_AU
local.contributor.affiliationGoodwin, Michael, Australian Astronomical Observatoryen_AU
local.contributor.affiliationKonstantopoulos, I. S., Australian Astronomical Observatoryen_AU
local.contributor.affiliationMedling, Anne, College of Science, ANUen_AU
local.contributor.affiliationSharp, Rob, College of Science, ANUen_AU
local.contributor.authoruidColless, Matthew, u9300169en_AU
local.contributor.authoruidD'Eugenio, Francesco, u1007828en_AU
local.contributor.authoruidMedling, Anne, u5434612en_AU
local.contributor.authoruidSharp, Rob, u4954956en_AU
local.description.notesImported from ARIESen_AU
local.identifier.absfor020103 - Cosmology and Extragalactic Astronomyen_AU
local.identifier.absfor020110 - Stellar Astronomy and Planetary Systemsen_AU
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciencesen_AU
local.identifier.ariespublicationa383154xPUB10138en_AU
local.identifier.citationvolume2en_AU
local.identifier.doi10.1038/s41550-018-0436-xen_AU
local.identifier.scopusID2-s2.0-85048114651
local.publisher.urlhttps://www.nature.com/en_AU
local.type.statusAccepted Versionen_AU

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