Search: onr:"swepub:oai:DiVA.org:su-195299" >
The Photometric Met...
The Photometric Metallicity and Carbon Distributions of the Milky Way's Halo and Solar Neighborhood from S-PLUS Observations of SDSS Stripe 82
-
Whitten, Devin D. (author)
-
Placco, Vinicius M. (author)
-
Beers, Timothy C. (author)
-
show more...
-
An, Deokkeun (author)
-
Lee, Young Sun (author)
-
Almeida-Fernandes, Felipe (author)
-
Herpich, Fábio R. (author)
-
Daflon, Simone (author)
-
Barbosa, Carlos E. (author)
-
Perottoni, Hélio D. (author)
-
Rossi, Silvia (author)
-
Tissera, Patricia B. (author)
-
Yoon, Jinmi (author)
-
- Youakim, Kris (author)
- Stockholms universitet,Institutionen för astronomi,Leibniz-Institut für Astrophysik Potsdam, Germany
-
Schoenell, William (author)
-
Ribeiro, Tiago (author)
-
Kanaan, Antonio (author)
-
show less...
-
(creator_code:org_t)
- 2021-05-14
- 2021
- English.
-
In: Astrophysical Journal. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 912:2
- Related links:
-
http://arxiv.org/pdf...
-
show more...
-
https://urn.kb.se/re...
-
https://doi.org/10.3...
-
show less...
Abstract
Subject headings
Close
- 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.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database
- By the author/editor
-
Whitten, Devin D ...
-
Placco, Vinicius ...
-
Beers, Timothy C ...
-
An, Deokkeun
-
Lee, Young Sun
-
Almeida-Fernande ...
-
show more...
-
Herpich, Fábio R ...
-
Daflon, Simone
-
Barbosa, Carlos ...
-
Perottoni, Hélio ...
-
Rossi, Silvia
-
Tissera, Patrici ...
-
Yoon, Jinmi
-
Youakim, Kris
-
Schoenell, Willi ...
-
Ribeiro, Tiago
-
Kanaan, Antonio
-
show less...
- About the subject
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Physical Science ...
- Articles in the publication
-
Astrophysical Jo ...
- By the university
-
Stockholm University