An enquiry on the origins of N-rich stars in the inner Galaxy based on APOGEE chemical compositions

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dc.contributor.authorKisku, Shobhit
dc.contributor.authorSchiavon, Ricardo P.
dc.contributor.authorHorta, Danny
dc.contributor.authorMason, Andrew
dc.contributor.authorMackereth, J. Ted
dc.contributor.authorHasselquist, Sten
dc.contributor.authorGarcia-Hernandez, D. A.
dc.contributor.authorBizyaev, Dmitry
dc.contributor.authorBrownstein, Joel R.
dc.contributor.authorLane, Richard R.
dc.contributor.authorMinniti, Dante
dc.contributor.authorPan, Kaike
dc.contributor.authorRoman-Lopes, Alexandre
dc.date.accessioned2025-01-20T22:02:24Z
dc.date.available2025-01-20T22:02:24Z
dc.date.issued2021
dc.description.abstractRecent evidence based on APOGEE data for stars within a few kpc of the Galactic Centre suggests that dissolved globular clusters (GCs) contribute significantly to the stellar mass budget of the inner halo. In this paper, we enquire into the origins of tracers of GC dissolution, N-rich stars, that are located in the inner 4 kpc of the Milky Way. From an analysis of the chemical compositions of these stars, we establish that about 30 per cent of the N-rich stars previously identified in the inner Galaxy may have an accreted origin. This result is confirmed by an analysis of the kinematic properties of our sample. The specific frequency of N-rich stars is quite large in the accreted population, exceeding that of its in situ counterparts by near an order of magnitude, in disagreement with predictions from numerical simulations. We hope that our numbers provide a useful test to models of GC formation and destruction.
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/stab525
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/stab525
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/93976
dc.identifier.wosidWOS:000659453800008
dc.issue.numero2
dc.language.isoen
dc.pagina.final1667
dc.pagina.inicio1657
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjectGalaxy: abundances
dc.subjectGalaxy: bulge
dc.subjectGalaxy: formation
dc.subjectglobular clusters: general
dc.subjectGalaxy: kinematics and dynamics
dc.titleAn enquiry on the origins of N-rich stars in the inner Galaxy based on APOGEE chemical compositions
dc.typeartículo
dc.volumen504
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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