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APOGEE Data Releases 13 and 14 : Stellar Parameter and Abundance Comparisons with Independent Analyses

Jönsson, Henrik LU ; Prieto, Carlos Allende; Holtzman, Jon A. LU ; Feuillet, Diane K.; Hawkins, Keith; Cunha, Katia; Mészáros, Szabolcs; Hasselquist, Sten; Fernández-Trincado, J. G. and Garciá-Hernández, D. A., et al. (2018) In Astronomical Journal 156(3).
Abstract

Data from the SDSS-IV/Apache Point Observatory Galactic Evolution Experiment (APOGEE-2) have been released as part of SDSS Data Releases 13 (DR13) and 14 (DR14). These include high-resolution H-band spectra, radial velocities, and derived stellar parameters and abundances. DR13, released in 2016 August, contained APOGEE data for roughly 150,000 stars, and DR14, released in 2017 August, added about 110,000 more. Stellar parameters and abundances have been derived with an automated pipeline, the APOGEE Stellar Parameter and Chemical Abundance Pipeline (ASPCAP). We evaluate the performance of this pipeline by comparing the derived stellar parameters and abundances to those inferred from optical spectra and analysis for several hundred... (More)

Data from the SDSS-IV/Apache Point Observatory Galactic Evolution Experiment (APOGEE-2) have been released as part of SDSS Data Releases 13 (DR13) and 14 (DR14). These include high-resolution H-band spectra, radial velocities, and derived stellar parameters and abundances. DR13, released in 2016 August, contained APOGEE data for roughly 150,000 stars, and DR14, released in 2017 August, added about 110,000 more. Stellar parameters and abundances have been derived with an automated pipeline, the APOGEE Stellar Parameter and Chemical Abundance Pipeline (ASPCAP). We evaluate the performance of this pipeline by comparing the derived stellar parameters and abundances to those inferred from optical spectra and analysis for several hundred stars. For most elements-C, Na, Mg, Al, Si, S, Ca, Cr, Mn, Ni-the DR14 ASPCAP analyses have systematic differences with the comparisons samples of less than 0.05 dex (median), and random differences of less than 0.15 dex (standard deviation). These differences are a combination of the uncertainties in both the comparison samples as well as the ASPCAP analysis. Compared to the references, magnesium is the most accurate alpha-element derived by ASPCAP, and shows a very clear thin/thick disk separation, while nickel is the most accurate iron-peak element (besides iron itself).

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Astronomical Journal
volume
156
issue
3
publisher
The American Astronomical Society
external identifiers
  • scopus:85053140907
ISSN
0004-6256
DOI
10.3847/1538-3881/aad4f5
language
English
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yes
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43f8b0c4-5999-49f2-8912-82e5ac77e1ce
date added to LUP
2018-10-15 13:09:19
date last changed
2019-06-11 03:55:01
@article{43f8b0c4-5999-49f2-8912-82e5ac77e1ce,
  abstract     = {<p>Data from the SDSS-IV/Apache Point Observatory Galactic Evolution Experiment (APOGEE-2) have been released as part of SDSS Data Releases 13 (DR13) and 14 (DR14). These include high-resolution H-band spectra, radial velocities, and derived stellar parameters and abundances. DR13, released in 2016 August, contained APOGEE data for roughly 150,000 stars, and DR14, released in 2017 August, added about 110,000 more. Stellar parameters and abundances have been derived with an automated pipeline, the APOGEE Stellar Parameter and Chemical Abundance Pipeline (ASPCAP). We evaluate the performance of this pipeline by comparing the derived stellar parameters and abundances to those inferred from optical spectra and analysis for several hundred stars. For most elements-C, Na, Mg, Al, Si, S, Ca, Cr, Mn, Ni-the DR14 ASPCAP analyses have systematic differences with the comparisons samples of less than 0.05 dex (median), and random differences of less than 0.15 dex (standard deviation). These differences are a combination of the uncertainties in both the comparison samples as well as the ASPCAP analysis. Compared to the references, magnesium is the most accurate alpha-element derived by ASPCAP, and shows a very clear thin/thick disk separation, while nickel is the most accurate iron-peak element (besides iron itself).</p>},
  articleno    = {126},
  author       = {Jönsson, Henrik and Prieto, Carlos Allende and Holtzman, Jon A. and Feuillet, Diane K. and Hawkins, Keith and Cunha, Katia and Mészáros, Szabolcs and Hasselquist, Sten and Fernández-Trincado, J. G. and Garciá-Hernández, D. A. and Bizyaev, Dmitry and Carrera, Ricardo and Majewski, Steven R. and Pinsonneault, Marc H. and Shetrone, Matthew and Smith, Verne and Sobeck, Jennifer and Souto, Diogo and Stringfellow, Guy S. and Teske, Johanna and Zamora, Olga},
  issn         = {0004-6256},
  language     = {eng},
  number       = {3},
  publisher    = {The American Astronomical Society},
  series       = {Astronomical Journal},
  title        = {APOGEE Data Releases 13 and 14 : Stellar Parameter and Abundance Comparisons with Independent Analyses},
  url          = {http://dx.doi.org/10.3847/1538-3881/aad4f5},
  volume       = {156},
  year         = {2018},
}