Extra-tidal star candidates in globular clusters of the sagittarius dwarf spheroidal galaxy

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dc.contributor.authorKundu, Richa
dc.contributor.authorNavarrete, Camila
dc.contributor.authorSbordone, Luca
dc.contributor.authorCarballo-Bello, Julio A.
dc.contributor.authorFernández-Trincado, José G.
dc.contributor.authorMinniti, Dante
dc.contributor.authorSingh, Harinder P.
dc.date.accessioned2023-05-09T22:37:25Z
dc.date.available2023-05-09T22:37:25Z
dc.date.issued2022-09
dc.descriptionIndexación: Scopus.es
dc.description.abstractContext. Globular clusters (GCs) associated with the Sagittarius dwarf spheroidal galaxy (Sgr dSph) have evolved under the gravita tional potential of both Sgr dSph and the Milky Way. The effects of these potentials are most pronounced in the extra-tidal regions as compared to the central regions of the GCs. Aims. We aim to study the extra-tidal regions of the GCs that are possibly associated with Sgr dSph, namely Arp 2, Terzan 8, NGC 5634, NGC 6284, Terzan 7, NGC 2419, NGC 4147, M 54 and Pal 12, using data from the Gaia early data release 3. Methods. We selected the extra-tidal candidates based on their angular distances from the cluster centre in the RA-Dec plane, proper motions of the clusters and the individual extra-tidal star candidates, and their positions on the colour-magnitude diagrams of the clusters. Results. We found extra-tidal candidates for the nine studied GCs. For eight of them, the surface density of candidate extra-tidal stars in the vicinity of the clusters is in significant excess with respect to more distant surrounding fields. No extended extra-tidal features beyond 5 tidal radii were detected for any of the clusters. Conclusions. We publish a list of the most probable extra-tidal candidates that we determined using Gaia astrometric and photometric data. Our analysis shows that the clusters that are associated with Sgr dSph are more likely affected by the gravitational potential of the Sgr, as the distribution of extra-tidal stars is elongated in the same direction as the local stream. NGC 4147 is the only exception. We found some high-probability candidate extra-tidal stars in several of the analysed clusters. We failed to detect any coherent large-scale tidal tail around themes
dc.description.urihttps://www.aanda.org/articles/aa/full_html/2022/09/aa41912-21/aa41912-21.html
dc.identifier.citationAstronomy and AstrophysicsOpen. Volume 665. September 2022. Article number A8es
dc.identifier.doiDOI: 10.1051/0004-6361/202141912
dc.identifier.issn0004-6361
dc.identifier.urihttps://repositorio.unab.cl/xmlui/handle/ria/49399
dc.language.isoenes
dc.publisherEDP Scienceses
dc.rights.licenseAtribution 4.0 International (CC BY 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/deed.es
dc.subjectGlobular Clusters: Generales
dc.subjectGalaxies: Clusters: individual: Sgr dSphes
dc.subjectGalaxies: Dwarfes
dc.subjectGalaxy: Formationes
dc.subjectGalaxy: Stellar Contentes
dc.titleExtra-tidal star candidates in globular clusters of the sagittarius dwarf spheroidal galaxyes
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