| Full text | |
| Author(s): Show less - |
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
|
| Affiliation: Show less - | [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 |
| Abstract | |
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: | 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: | 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: | 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: | 19/26492-3 - Science with the Brazilian robotic telescope |
| Grantee: | Claudia Lucia Mendes de Oliveira |
| Support type: | Research Projects - Thematic Grants |
| 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: | 18/21250-9 - 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 |