The APO-K2 Catalog. I. ∼7500 Red Giants with Fundamental Stellar Parameters from APOGEE DR17 Spectroscopy and K2-GAP Asteroseismology

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dc.contributor.authorSchonhut-Stasik, Jessica
dc.contributor.authorZinn, Joel C.
dc.contributor.authorStassun, Keivan G.
dc.contributor.authorPinsonneault, Marc
dc.contributor.authorJohnson, Jennifer A.
dc.contributor.authorWarfield, Jack T.
dc.contributor.authorStello, Dennis
dc.contributor.authorElsworth, Yvonne
dc.contributor.authorGarcía, Rafael A.
dc.contributor.authorMathur, Savita
dc.contributor.authorMosser, Benoit
dc.contributor.authorHon, Marc
dc.contributor.authorTayar, Jamie
dc.contributor.authorStringfellow, Guy S.
dc.contributor.authorBeaton, Rachael L.
dc.contributor.authorJönsson, Henrik
dc.contributor.authorMinniti, Dante
dc.date.accessioned2024-05-27T19:42:51Z
dc.date.available2024-05-27T19:42:51Z
dc.date.issued2024-02-01
dc.descriptionIndexación: Scopus.
dc.description.abstractWe present a catalog of fundamental stellar properties for ∼7500 evolved stars, including stellar radii and masses, determined from the combination of spectroscopic observations from the Apache Point Observatory Galactic Evolution Experiment, part of the Sloan Digital Sky Survey IV, and asteroseismology from K2. The resulting APO-K2 catalog provides spectroscopically derived temperatures and metallicities, asteroseismic global parameters, evolutionary states, and asteroseismically derived masses and radii. Additionally, we include kinematic information from Gaia. We investigate the multidimensional space of abundance, stellar mass, and velocity with an eye toward applications in Galactic archaeology. The APO-K2 sample has a large population of low-metallicity stars (∼288 with [M/H] ≤ −1), and their asteroseismic masses are larger than astrophysical estimates. We argue that this may reflect offsets in the adopted fundamental temperature scale for metal-poor stars rather than metallicity-dependent issues with interpreting asteroseismic data. We characterize the kinematic properties of the population as a function of α enhancement and position in the disk and identify those stars in the sample that are candidate components of the Gaia-Enceladus merger. Importantly, we characterize the selection function for the APO-K2 sample as a function of metallicity, radius, mass, ν max , color, and magnitude referencing Galactic simulations and target selection criteria to enable robust statistical inferences with the catalog.
dc.description.urihttps://www-scopus-com.recursosbiblioteca.unab.cl/record/display.uri?eid=2-s2.0-85182384287&origin=resultslist&sort=plf-f&src=s&nlo=&nlr=&nls=&sid=707dd3f1b41ea5fd7d40030e6f036abf&sot=aff&sdt=cl&cluster=scofreetoread%2c%22all%22%2ct&sl=34&s=AF-ID%2860002636%29+AND+SUBJAREA%28PHYS%29&relpos=65&citeCnt=4&searchTerm=
dc.identifier.citationAstronomical Journal Open Access Volume 167, Issue 21 February 2024 Article number 50
dc.identifier.doi10.3847/1538-3881/ad0b13
dc.identifier.issn00046256
dc.identifier.urihttps://repositorio.unab.cl/handle/ria/57144
dc.language.isoen
dc.publisherAmerican Astronomical Society
dc.rights.licenseCC BY 4.0 DEED Attribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectDisk Galaxy
dc.subjectStars: Abundances
dc.subjectMilky Way
dc.titleThe APO-K2 Catalog. I. ∼7500 Red Giants with Fundamental Stellar Parameters from APOGEE DR17 Spectroscopy and K2-GAP Asteroseismology
dc.typeArtículo
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Schonhut-Stasik-J-The-APOK2-Catalog-I-7500-Red-Giants-with-Fundamental-Stellar-Parameters-from-APOGEE-DR17-Spectroscopy-and-K2GAP-Asteroseismology.pdf
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