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NGC 1866: First Spectroscopic Detection of Fast-rotating Stars in a Young LMC Cluster

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dc.contributor.authorDupree, A. K.
dc.contributor.authorDotter, Aaron
dc.contributor.authorJohnson, C. I.
dc.contributor.authorMarino, Anna Fabiola
dc.contributor.authorMilone, Antonino P.
dc.contributor.authorBailey III, J. I.
dc.contributor.authorCrane, J. D.
dc.contributor.authorMateo, Mario
dc.contributor.authorOlszewski, Edward W.
dc.date.accessioned2020-12-20T20:57:25Z
dc.date.available2020-12-20T20:57:25Z
dc.date.issued2017-08-23
dc.date.updated2020-11-23T10:52:44Z
dc.description.abstractHigh-resolution spectroscopic observations were taken of 29 extended main-sequence turnoff (eMSTO) stars in the young (~200 Myr) Large Magellanic Cloud (LMC) cluster, NGC 1866, using the Michigan/Magellan Fiber System and MSpec spectrograph on the Magellan-Clay 6.5 m telescope. These spectra reveal the first direct detection of rapidly rotating stars whose presence has only been inferred from photometric studies. The eMSTO stars exhibit Hα emission (indicative of Be-star decretion disks), others have shallow broad Hα absorption (consistent with rotation gsim150 km s−1), or deep Hα core absorption signaling lower rotation velocities (lesssim150 km s−1). The spectra appear consistent with two populations of stars—one rapidly rotating, and the other, younger and slowly rotating.
dc.description.sponsorshipA.F.M. and A.P.M. acknowledge support by the Australian Research Council through Discovery Early Career Researcher Awards DE160100851 and DE150101816. E.W.O. was partially supported by NSF grant AST1313006.
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.issn2041-8205
dc.identifier.urihttp://hdl.handle.net/1885/218257
dc.language.isoen_AUen_AU
dc.publisherInstitute of Physics Publishing Ltd.
dc.relation.urihttp://purl.org/au-research/grants/arc/DE160100851
dc.relation.urihttp://purl.org/au-research/grants/arc/DE150101816
dc.rights© 2017 The American Astronomical Society
dc.sourceAstrophysical Journal Letters
dc.titleNGC 1866: First Spectroscopic Detection of Fast-rotating Stars in a Young LMC Cluster
dc.typeJournal article
local.bibliographicCitation.issue1
local.contributor.affiliationDupree, A. K., Harvard-Smithsonian Center for Astrophysics
local.contributor.affiliationDotter, Aaron, College of Science, ANU
local.contributor.affiliationJohnson, C. I., Harvard-Smithsonian Center for Astrophysics
local.contributor.affiliationMarino, Anna, College of Science, ANU
local.contributor.affiliationMilone, Antonino, College of Science, ANU
local.contributor.affiliationBailey III, J. I., Leiden Observatory
local.contributor.affiliationCrane, J.D, The Observatories of the Carnegie Institution for Science
local.contributor.affiliationMateo, Mario, University of Michigan
local.contributor.affiliationOlszewski, Edward W, University of Arizona
local.contributor.authoruidDotter, Aaron, u5239381
local.contributor.authoruidMarino, Anna, u5239722
local.contributor.authoruidMilone, Antonino, u5219567
local.description.embargo2099-12-31
local.description.notesImported from ARIES
local.identifier.absfor020110 - Stellar Astronomy and Planetary Systems
local.identifier.ariespublicationu4105856xPUB92
local.identifier.citationvolume846
local.identifier.doi10.3847/2041-8213/aa85dd
local.identifier.scopusID2-s2.0-85028923164
local.identifier.thomsonID000410701700001
local.type.statusPublished Version

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