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dc.contributor.authorMinniti, D.
dc.contributor.authorRipepi, V.
dc.contributor.authorFernández-Trincado, J. G.
dc.contributor.authorAlonso-García, J.
dc.contributor.authorSmith, L. C.
dc.contributor.authorLucas, P. W.
dc.contributor.authorGómez, M.
dc.contributor.authorPullen, J. B.
dc.contributor.authorGarro, E. R.
dc.contributor.authorCádiz, F. Vivanco
dc.contributor.authorHempel, M.
dc.contributor.authorRejkuba, M.
dc.contributor.authorSaito, R. K.
dc.contributor.authorPalma, T.
dc.contributor.authorClariá, J. J.
dc.contributor.authorGregg, M.
dc.contributor.authorMajaess, D.
dc.date.accessioned2021-03-29T23:10:03Z
dc.date.available2021-03-29T23:10:03Z
dc.date.issued2021-03-12
dc.identifier.citationMinniti , D , Ripepi , V , Fernández-Trincado , J G , Alonso-García , J , Smith , L C , Lucas , P W , Gómez , M , Pullen , J B , Garro , E R , Cádiz , F V , Hempel , M , Rejkuba , M , Saito , R K , Palma , T , Clariá , J J , Gregg , M & Majaess , D 2021 , ' Discovery of new globular clusters in the Sagittarius dwarf galaxy ' , Astronomy & Astrophysics , vol. 647 , L4 . https://doi.org/10.1051/0004-6361/202140395
dc.identifier.issn0004-6361
dc.identifier.otherArXiv: http://arxiv.org/abs/2103.08196v1
dc.identifier.otherORCID: /0000-0002-8872-4462/work/91649536
dc.identifier.urihttp://hdl.handle.net/2299/24198
dc.description© ESO 2021. Published by EDP Sciences. This is the accepted manuscript version of an article which has been published in final form at https://doi.org/10.1051/0004-6361/202140395
dc.description.abstractContext. Globular clusters (GCs) are witnesses of the past accretion events onto the Milky Way. In particular, the GCs of the Sagittarius (Sgr) dwarf galaxy are important probes of an on-going merger. Aims. Our main goal is to search for new GC members of this dwarf galaxy using the VISTA Variables in the Via Lactea Extended Survey (VVVX) near-infrared database combined with the Gaia Early Data Release 3 (EDR3) optical database. Methods. We investigated all VVVX-enabled discoveries of GC candidates in a region covering about 180 sq. deg. toward the bulge and the Sgr dwarf galaxy. We used multiband point-spread function photometry to obtain deep color-magnitude diagrams (CMDs) and luminosity functions (LFs) for all GC candidates, complemented by accurate Gaia-EDR3 proper motions (PMs) to select Sgr members and variability information to select RR Lyrae which are potential GC members. Results. After applying a strict PM cut to discard foreground bulge and disk stars, the CMDs and LFs for some of the GC candidates exhibit well defined red giant branches and red clump giant star peaks. We selected the best Sgr GCs, estimating their distances, reddenings, and associated RR Lyrae. Conclusions. We discover 12 new Sgr GC members, more than doubling the number of GCs known in this dwarf galaxy. In addition, there are 11 other GC candidates identified that are uncertain, awaiting better data for confirmation.en
dc.format.extent12
dc.format.extent4201675
dc.language.isoeng
dc.relation.ispartofAstronomy & Astrophysics
dc.subjectGalaxies: dwarf
dc.subjectGalaxies: star clusters: general
dc.subjectGlobular clusters: general
dc.subjectStars: variables: RR Lyrae
dc.subjectAstronomy and Astrophysics
dc.subjectSpace and Planetary Science
dc.titleDiscovery of new globular clusters in the Sagittarius dwarf galaxyen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionCentre for Climate Change Research (C3R)
dc.contributor.institutionSchool of Physics, Engineering & Computer Science
dc.contributor.institutionDepartment of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85102551412&partnerID=8YFLogxK
rioxxterms.versionofrecord10.1051/0004-6361/202140395
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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