The Photometric Metallicity and Carbon Distributions of the Milky Way's Halo and Solar Neighborhood from S-PLUS Observations of SDSS Stripe 82

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dc.contributor.authorWhitten, Devin D.
dc.contributor.authorPlacco, Vinicius M.
dc.contributor.authorBeers, Timothy C.
dc.contributor.authorAn, Deokkeun
dc.contributor.authorLee, Young Sun
dc.contributor.authorAlmeida-Fernandes, Felipe
dc.contributor.authorHerpich, Fabio R.
dc.contributor.authorDaflon, Simone
dc.contributor.authorBarbosa, Carlos E.
dc.contributor.authorPerottoni, Helio D.
dc.contributor.authorRossi, Silvia
dc.contributor.authorTissera, Patricia B.
dc.contributor.authorYoon, Jinmi
dc.contributor.authorYouakim, Kris
dc.contributor.authorSchoenell, William
dc.contributor.authorRibeiro, Tiago
dc.contributor.authorKanaan, Antonio
dc.date.accessioned2025-01-20T23:51:13Z
dc.date.available2025-01-20T23:51:13Z
dc.date.issued2021
dc.description.abstractWe report photometric estimates of effective temperature, T (eff), metallicity, [Fe/H], carbonicity, [C/Fe], and absolute carbon abundances, A(C), for over 700,000 stars from the Southern Photometric Local Universe Survey (S-PLUS) Data Release 2, covering a substantial fraction of the equatorial Sloan Digital Sky Survey Stripe 82. We present an analysis for two stellar populations: (1) halo main-sequence turnoff stars and (2) K-dwarf stars of mass 0.58 < M/M (circle dot) < 0.75 in the Solar Neighborhood. Application of the Stellar Photometric Index Network Explorer (SPHINX) to the mixed-bandwidth (narrow- plus wide-band) filter photometry from S-PLUS produces robust estimates of the metallicities and carbon abundances in stellar atmospheres over a wide range of temperatures, 4250 < T (eff)(K) < 7000. The use of multiple narrow-band S-PLUS filters enables SPHINX to achieve substantially lower levels of "catastrophic failures" (i.e., large offsets in metallicity estimates relative to spectroscopic determinations) than previous efforts using a single metallicity-sensitive narrow-band filter. We constrain the exponential slope of the Milky Way's K-dwarf halo metallicity distribution function (MDF), lambda (10,[Fe/H]) = 0.85 +/- 0.21, over the metallicity range -2.5 < [Fe/H] < -1.0; the MDF of our local-volume K-dwarf sample is well-represented by a gamma distribution with parameters alpha = 2.8 and beta = 4.2. S-PLUS photometry obtains absolute carbon abundances with a precision of similar to 0.35 dex for stars with T (eff) < 6500 K. We identify 364 candidate carbon-enhanced metal-poor stars, obtain assignments of these stars into the Yoon-Beers morphological groups in the A(C)-[Fe/H] space, and we derive the CEMP frequencies.
dc.fuente.origenWOS
dc.identifier.doi10.3847/1538-4357/abee7e
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://doi.org/10.3847/1538-4357/abee7e
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/94790
dc.identifier.wosidWOS:000651769400001
dc.issue.numero2
dc.language.isoen
dc.revistaAstrophysical journal
dc.rightsacceso restringido
dc.titleThe Photometric Metallicity and Carbon Distributions of the Milky Way's Halo and Solar Neighborhood from S-PLUS Observations of SDSS Stripe 82
dc.typeartículo
dc.volumen912
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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