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dc.contributor.author
Piatti, Andres Eduardo  
dc.date.available
2022-10-14T19:52:09Z  
dc.date.issued
2021-09  
dc.identifier.citation
Piatti, Andres Eduardo; Globular cluster candidates in the Sagittarius dwarf galaxy; IOP Publishing; Astronomical Journal; 162; 6; 9-2021; 1-10  
dc.identifier.issn
0004-6256  
dc.identifier.uri
http://hdl.handle.net/11336/173345  
dc.description.abstract
Recently, new Sagittarius (Sgr) dwarf-galaxy globular clusters were discovered, which opens the question of the actual size of the Sgr globular cluster population, and therefore on our understanding of the Sgr galaxy formation and accretion history of the Milky Way. Based on Gaia EDR3 and SDSS IV DR16 (APOGEE-2) data sets, we performed an analysis of the color-magnitude diagrams (CMDs) of the eight new Sgr globular clusters found by Minniti et al. from a sound cleaning of the contamination of Milky Way and Sgr field stars, complemented by available kinematic and metal abundance information. The cleaned CMDs and spatial stellar distibutions reveal the presence of stars with a wide range of cluster membership probabilities. Minni 332 turned out to be a younger (<9 Gyr) and more metal-rich ([M/H] ⪆ -1.0 dex) globular cluster than M54, the nuclear Sgr globular cluster; as could also be the case of Minni 342, 348, and 349, although their results are less convincing. Minni 341 could be an open cluster candidate (age < 1 Gyr, [M/H] ∼ -0.3 dex), while the analyses of Minni 335, 343, and 344 did not allow us to confirm their physical reality. We also built the Sgr cluster frequency (CF) using available ages of the Sgr globular clusters and compared it with that obtained from the Sgr star formation history. Both CFs are in excellent agreement. However, the addition of eight new globular clusters with ages and metallicities distributed according to the Sgr age-metallicity relationship turns out in a remarkably different CF.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
IOP Publishing  
dc.rights
info:eu-repo/semantics/restrictedAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
STAR CLUSTERS  
dc.subject
SAGITTARIUS DWARF SPHEROIDAL GALAXY  
dc.subject
PHOTOMETRY  
dc.subject.classification
Otras Ciencias Naturales y Exactas  
dc.subject.classification
Otras Ciencias Naturales y Exactas  
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS  
dc.title
Globular cluster candidates in the Sagittarius dwarf galaxy  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2022-10-13T16:42:09Z  
dc.journal.volume
162  
dc.journal.number
6  
dc.journal.pagination
1-10  
dc.journal.pais
Reino Unido  
dc.journal.ciudad
Londres  
dc.description.fil
Fil: Piatti, Andres Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Interdisciplinario de Ciencias Básicas. - Universidad Nacional de Cuyo. Instituto Interdisciplinario de Ciencias Básicas; Argentina  
dc.journal.title
Astronomical Journal  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-3881/ac2833  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.3847/1538-3881/ac2833