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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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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Whitten, Devin D. [1, 2] ; Placco, Vinicius M. [1, 2, 3] ; Beers, Timothy C. [1, 2] ; An, Deokkeun [4] ; Lee, Young Sun [5] ; Almeida-Fernandes, Felipe [6] ; Herpich, Fabio R. [6] ; Daflon, Simone [7] ; Barbosa, Carlos E. [6] ; Perottoni, Helio D. [6] ; Rossi, Silvia [6] ; Tissera, Patricia B. [8, 9] ; Yoon, Jinmi [1, 2, 10] ; Youakim, Kris [11, 12] ; Schoenell, William [13] ; Ribeiro, Tiago [14] ; Kanaan, Antonio [15]
Total Authors: 17
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[1] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 - USA
[2] Univ Notre Dame, JINA Ctr Evolut Elements, Notre Dame, IN 46556 - USA
[3] NSF NOIRLab, Community Sci & Data Ctr, 950 N Cherry Ave, Tucson, AZ 85719 - USA
[4] Ewha Womans Univ, Dept Sci Educ, 52 Ewhayeodae Gil, Seoul 03760 - South Korea
[5] Chungnam Natl Univ, Dept Astron & Space Sci, Daejeon 34134 - South Korea
[6] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Dept Astron, Cidade Univ, BR-05508900 Sao Paulo, SP - Brazil
[7] Observ Nacl MCTIC ON, Rua Gal Jose Cristino 77, BR-20921400 Sao Cristovao, RJ - Brazil
[8] Pontificia Univ Catolica Chile, Inst Astrofis, Av Vicuna Mackenna 4860, Santiago - Chile
[9] Pontificia Univ Catolica Chile, Ctr Astroingn, Av Vicuna Mackenna 4860, Santiago - Chile
[10] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 - USA
[11] Leibniz Inst Astrophys Potsdam, Sternwarte 16, D-14482 Potsdam - Germany
[12] Stockholm Univ, AlbaNova Univ Ctr, Dept Astron, SE-10691 Stockholm - Sweden
[13] GMTO Corp, 465 N Halstead St, Suite 250, Pasadena, CA 91107 - USA
[14] Rubin Observ Project Off, 950 N Cherry Ave, Tucson, AZ 85719 - USA
[15] Univ Fed Santa Catarina, Dept Fis, BR-88040900 Florianopolis, SC - Brazil
Total Affiliations: 15
Document type: Journal article
Source: ASTROPHYSICAL JOURNAL; v. 912, n. 2 MAY 2021.
Web of Science Citations: 1

We 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. (AU)

FAPESP's process: 16/12331-0 - Galaxy evolution in different environments using spatially resolved kinematics and stellar populations
Grantee:Carlos Eduardo Barbosa
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 18/21661-9 - Cataloguing Variable Sources and IFU-like Science with Multiband Surveys.
Grantee:Fábio Rafael Herpich
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 18/20977-2 - Identification of giant stars for mapping our Galaxy in the S-PLUS survey
Grantee:Felipe de Almeida Fernandes
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 19/11910-4 - Exploiting data from SAM-FP and T80-South
Grantee:Claudia Lucia Mendes de Oliveira
Support type: Regular Research Grants
FAPESP's process: 09/54202-8 - Acquisition of a robotic telescope for the Brazilian astronomical community
Grantee:Claudia Lucia Mendes de Oliveira
Support type: Multi-user Equipment Program
FAPESP's process: 18/21250-9 - Identification of bright ultra-metal-poor stars from Multi-Band photometry and spectroscopic follow-up
Grantee:Hélio Dotto Perottoni
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 19/26492-3 - Science with the Brazilian robotic telescope
Grantee:Claudia Lucia Mendes de Oliveira
Support type: Research Projects - Thematic Grants