The ACS Survey Of Galactic Globular Clusters. III. The Double Subgiant Branch Of NGC 1851

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dc.contributor.utaustinauthorSiegel, M.en_US
dc.creatorMilone, A. P.en_US
dc.creatorBedin, L. R.en_US
dc.creatorPiotto, G.en_US
dc.creatorAnderson, J.en_US
dc.creatorKing, I. R.en_US
dc.creatorSarajedini, A.en_US
dc.creatorDotter, A.en_US
dc.creatorChaboyer, B.en_US
dc.creatorMarin-Franch, A.en_US
dc.creatorMajewski, S.en_US
dc.creatorAparicio, A.en_US
dc.creatorHempel, M.en_US
dc.creatorPaust, N. E. Q.en_US
dc.creatorReid, I. N.en_US
dc.creatorRosenberg, A.en_US
dc.creatorSiegel, M.en_US
dc.date.accessioned2016-04-28T22:22:19Z
dc.date.available2016-04-28T22:22:19Z
dc.date.issued2008-01en
dc.description.abstractPhotometry with the Hubble Space Telescope Advanced Camera for Surveys (HSTACS) reveals that the subgiant branch (SGB) of the globular cluster NGC 1851 splits into two well-defined branches. If the split is due only to an age effect, the two SGBs would imply two star formation episodes separated by similar to 1 Gyr. We discuss other anomalies in NGC 1851 that could be interpreted in terms of a double stellar population. Finally, we compare the case of NGC 1851 with the other two globulars known to host multiple stellar populations, and show that all three clusters differ in several important respects.en_US
dc.description.departmentMcDonald Observatoryen_US
dc.description.sponsorshipNASA NAS5-26555en_US
dc.identifierdoi:10.15781/T2925F
dc.identifier.Filename2008_01_acssurveyiii.pdfen_US
dc.identifier.citationMilone, A. P., L. R. Bedin, G. Piotto, J. Anderson, I. R. King, A. Sarajedini, A. Dotter et al. "The ACS survey of Galactic globular clusters. III. The double subgiant branch of NGC 1851." The Astrophysical Journal, Vol. 673, No. 1 (Jan., 2008): 241.en_US
dc.identifier.doi10.1086/524188en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/2152/35219
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.subjectglobular clusters : individual (ngc 1851)en_US
dc.subjecthertzsprung-russell diagramen_US
dc.subjectdouble main-sequenceen_US
dc.subjectomega-centaurien_US
dc.subjectphotometric performanceen_US
dc.subjectabundanceen_US
dc.subjectvariationsen_US
dc.subjectself-pollutionen_US
dc.subjectstarsen_US
dc.subjectheliumen_US
dc.subjectevolutionen_US
dc.subjectgalaxyen_US
dc.subjectmetallicityen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleThe ACS Survey Of Galactic Globular Clusters. III. The Double Subgiant Branch Of NGC 1851en_US
dc.typeArticleen_US

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