Is Terzan 5 the remnant of a building block of the Galactic bulge? Evidence from APOGEE

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dc.contributor.authorTaylor, Dominic J.
dc.contributor.authorMason, Andrew C.
dc.contributor.authorSchiavon, Ricardo P.
dc.contributor.authorHorta, Danny
dc.contributor.authorNataf, David M.
dc.contributor.authorGeisler, Doug
dc.contributor.authorKisku, Shobhit
dc.contributor.authorPhillips, Siân G.
dc.contributor.authorCohen, Roger E.
dc.contributor.authorFernández Trincado, José G.
dc.contributor.authorBeers, Timothy C.
dc.contributor.authorBizyaev, Dmitry
dc.contributor.authorGarcía Hernández, Domingo Aníbal
dc.contributor.authorLane, Richard R.
dc.contributor.authorLonga Peña, Penélope
dc.contributor.authorMinniti, Dante
dc.contributor.authorMuñoz, Cesar
dc.contributor.authorPan, Kaike
dc.contributor.authorVillanova, Sandro
dc.date.accessioned2023-11-27T14:32:49Z
dc.date.available2023-11-27T14:32:49Z
dc.date.issued2022-07-01
dc.descriptionIndexación: Scopus.es
dc.description.abstractIt has been proposed that the globular cluster-like system Terzan 5 is the surviving remnant of a primordial building block of the Milky Way bulge, mainly due to the age/metallicity spread and the distribution of its stars in the α-Fe plane. We employ Sloan Digital Sky Survey data from the Apache Point Observatory Galactic Evolution Experiment to test this hypothesis. Adopting a random sampling technique, we contrast the abundances of 10 elements in Terzan 5 stars with those of their bulge field counterparts with comparable atmospheric parameters, finding that they differ at statistically significant levels. Abundances between the two groups differ by more than 1σ in Ca, Mn, C, O, and Al, and more than 2σ in Si and Mg. Terzan 5 stars have lower [α/Fe] and higher [Mn/Fe] than their bulge counterparts. Given those differences, we conclude that Terzan 5 is not the remnant of a major building block of the bulge. We also estimate the stellar mass of the Terzan 5 progenitor based on predictions by the Evolution and Assembly of GaLaxies and their Environments suite of cosmological numerical simulations, concluding that it may have been as low as ∼3 × 108 M⊙ so that it was likely unable to significantly influence the mean chemistry of the bulge/inner disc, which is significantly more massive (∼1010 M⊙). We briefly discuss existing scenarios for the nature of Terzan 5 and propose an observational test that may help elucidate its origin. © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.es
dc.description.urihttps://academic-oup-com.recursosbiblioteca.unab.cl/mnras/article/513/3/3429/6565286
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, Volume 513, Issue 3, Pages 3429 - 3443, 1 July 2022es
dc.identifier.doi10.1093/mnras/stac968
dc.identifier.issn0035-8711
dc.identifier.urihttps://repositorio.unab.cl/xmlui/handle/ria/54142
dc.language.isoenes
dc.publisherOxford University Presses
dc.rights.licenseCC BY 4.0 DEED Atribución 4.0 Internacional
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/deed.es
dc.subjectGalaxy: abundanceses
dc.subjectGalaxy: bulgees
dc.subjectGalaxy: formationes
dc.titleIs Terzan 5 the remnant of a building block of the Galactic bulge? Evidence from APOGEEes
dc.typeArtículoes
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