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ASPCAP : The APOGEE STELLAR PARAMETER and CHEMICAL ABUNDANCES PIPELINE

García Pérez, Ana E. ; Prieto, Carlos Allende ; Holtzman, Jon A. LU ; Shetrone, Matthew ; Mészáros, Szabolcs ; Bizyaev, Dmitry ; Carrera, Ricardo ; Cunha, Katia ; García-Hernández, D. A. and Johnson, Jennifer A. LU , et al. (2016) In The Astronomical Journal 151(6).
Abstract

The Apache Point Observatory Galactic Evolution Experiment (APOGEE) has built the largest moderately high-resolution (R ≈ 22,500) spectroscopic map of the stars across the Milky Way, and including dust-obscured areas. The APOGEE Stellar Parameter and Chemical Abundances Pipeline (ASPCAP) is the software developed for the automated analysis of these spectra. ASPCAP determines atmospheric parameters and chemical abundances from observed spectra by comparing observed spectra to libraries of theoretical spectra, using χ2 minimization in a multidimensional parameter space. The package consists of a fortran90 code that does the actual minimization and a wrapper IDL code for book-keeping and data handling. This paper explains in... (More)

The Apache Point Observatory Galactic Evolution Experiment (APOGEE) has built the largest moderately high-resolution (R ≈ 22,500) spectroscopic map of the stars across the Milky Way, and including dust-obscured areas. The APOGEE Stellar Parameter and Chemical Abundances Pipeline (ASPCAP) is the software developed for the automated analysis of these spectra. ASPCAP determines atmospheric parameters and chemical abundances from observed spectra by comparing observed spectra to libraries of theoretical spectra, using χ2 minimization in a multidimensional parameter space. The package consists of a fortran90 code that does the actual minimization and a wrapper IDL code for book-keeping and data handling. This paper explains in detail the ASPCAP components and functionality, and presents results from a number of tests designed to check its performance. ASPCAP provides stellar effective temperatures, surface gravities, and metallicities precise to 2%, 0.1 dex, and 0.05 dex, respectively, for most APOGEE stars, which are predominantly giants. It also provides abundances for up to 15 chemical elements with various levels of precision, typically under 0.1 dex. The final data release (DR12) of the Sloan Digital Sky Survey III contains an APOGEE database of more than 150,000 stars. ASPCAP development continues in the SDSS-IV APOGEE-2 survey.

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publishing date
type
Contribution to journal
publication status
published
subject
keywords
Galaxy: center, Galaxy: structure, methods: data analysis, stars: abundances, stars: atmospheres Supporting material: machine-readable table
in
The Astronomical Journal
volume
151
issue
6
article number
144
publisher
IOP Publishing
external identifiers
  • scopus:84975486186
ISSN
0004-6256
DOI
10.3847/0004-6256/151/6/144
language
English
LU publication?
no
additional info
Publisher Copyright: © 2016. The American Astronomical Society. All rights reserved..
id
5d13c772-1450-41d5-8953-247edae772a7
date added to LUP
2022-03-08 10:16:01
date last changed
2025-04-04 14:05:26
@article{5d13c772-1450-41d5-8953-247edae772a7,
  abstract     = {{<p>The Apache Point Observatory Galactic Evolution Experiment (APOGEE) has built the largest moderately high-resolution (R ≈ 22,500) spectroscopic map of the stars across the Milky Way, and including dust-obscured areas. The APOGEE Stellar Parameter and Chemical Abundances Pipeline (ASPCAP) is the software developed for the automated analysis of these spectra. ASPCAP determines atmospheric parameters and chemical abundances from observed spectra by comparing observed spectra to libraries of theoretical spectra, using χ<sup>2</sup> minimization in a multidimensional parameter space. The package consists of a fortran90 code that does the actual minimization and a wrapper IDL code for book-keeping and data handling. This paper explains in detail the ASPCAP components and functionality, and presents results from a number of tests designed to check its performance. ASPCAP provides stellar effective temperatures, surface gravities, and metallicities precise to 2%, 0.1 dex, and 0.05 dex, respectively, for most APOGEE stars, which are predominantly giants. It also provides abundances for up to 15 chemical elements with various levels of precision, typically under 0.1 dex. The final data release (DR12) of the Sloan Digital Sky Survey III contains an APOGEE database of more than 150,000 stars. ASPCAP development continues in the SDSS-IV APOGEE-2 survey.</p>}},
  author       = {{García Pérez, Ana E. and Prieto, Carlos Allende and Holtzman, Jon A. and Shetrone, Matthew and Mészáros, Szabolcs and Bizyaev, Dmitry and Carrera, Ricardo and Cunha, Katia and García-Hernández, D. A. and Johnson, Jennifer A. and Majewski, Steven R. and Nidever, David L. and Schiavon, Ricardo P. and Shane, Neville and Smith, Verne V. and Sobeck, Jennifer and Troup, Nicholas and Zamora, Olga and Weinberg, David H. and Bovy, Jo and Eisenstein, Daniel J. and Feuillet, Diane and Frinchaboy, Peter M. and Hayden, Michael R. and Hearty, Fred R. and Nguyen, Duy C. and O'Connell, Robert W. and Pinsonneault, Marc H. and Wilson, John C. and Zasowski, Gail}},
  issn         = {{0004-6256}},
  keywords     = {{Galaxy: center; Galaxy: structure; methods: data analysis; stars: abundances; stars: atmospheres Supporting material: machine-readable table}},
  language     = {{eng}},
  number       = {{6}},
  publisher    = {{IOP Publishing}},
  series       = {{The Astronomical Journal}},
  title        = {{ASPCAP : The APOGEE STELLAR PARAMETER and CHEMICAL ABUNDANCES PIPELINE}},
  url          = {{http://dx.doi.org/10.3847/0004-6256/151/6/144}},
  doi          = {{10.3847/0004-6256/151/6/144}},
  volume       = {{151}},
  year         = {{2016}},
}