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APOGEE Data Releases 13 and 14 : Data and Analysis

Holtzman, Jon A. LU ; Hasselquist, Sten; Shetrone, Matthew; Cunha, Katia; Prieto, Carlos Allende; Anguiano, Borja; Bizyaev, Dmitry; Bovy, Jo; Casey, Andrew and Edvardsson, Bengt, et al. (2018) In Astronomical Journal 156(3).
Abstract

The data and analysis methodology used for the SDSS/APOGEE Data Releases 13 and 14 are described, highlighting differences from the DR12 analysis presented in Holtzman et al. Some improvement in the handling of telluric absorption and persistence is demonstrated. The derivation and calibration of stellar parameters, chemical abundances, and respective uncertainties are described, along with the ranges over which calibration was performed. Some known issues with the public data related to the calibration of the effective temperatures (DR13), surface gravity (DR13 and DR14), and C and N abundances for dwarfs (DR13 and DR14) are highlighted. We discuss how results from a data-driven technique, The Cannon, are included in DR14 and compare... (More)

The data and analysis methodology used for the SDSS/APOGEE Data Releases 13 and 14 are described, highlighting differences from the DR12 analysis presented in Holtzman et al. Some improvement in the handling of telluric absorption and persistence is demonstrated. The derivation and calibration of stellar parameters, chemical abundances, and respective uncertainties are described, along with the ranges over which calibration was performed. Some known issues with the public data related to the calibration of the effective temperatures (DR13), surface gravity (DR13 and DR14), and C and N abundances for dwarfs (DR13 and DR14) are highlighted. We discuss how results from a data-driven technique, The Cannon, are included in DR14 and compare those with results from the APOGEE Stellar Parameters and Chemical Abundances Pipeline. We describe how using The Cannon in a mode that restricts the abundance analysis of each element to regions of the spectrum with known features from that element leads to Cannon abundances can lead to significantly different results for some elements than when all regions of the spectrum are used to derive abundances.

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publication status
published
subject
keywords
methods: data analysis, stars: abundances, techniques: spectroscopic
in
Astronomical Journal
volume
156
issue
3
publisher
The American Astronomical Society
external identifiers
  • scopus:85053105183
ISSN
0004-6256
DOI
10.3847/1538-3881/aad4f9
language
English
LU publication?
yes
id
f7822b80-9901-412a-98b7-b583dd3a09b4
date added to LUP
2018-10-15 13:55:36
date last changed
2019-02-20 11:31:28
@article{f7822b80-9901-412a-98b7-b583dd3a09b4,
  abstract     = {<p>The data and analysis methodology used for the SDSS/APOGEE Data Releases 13 and 14 are described, highlighting differences from the DR12 analysis presented in Holtzman et al. Some improvement in the handling of telluric absorption and persistence is demonstrated. The derivation and calibration of stellar parameters, chemical abundances, and respective uncertainties are described, along with the ranges over which calibration was performed. Some known issues with the public data related to the calibration of the effective temperatures (DR13), surface gravity (DR13 and DR14), and C and N abundances for dwarfs (DR13 and DR14) are highlighted. We discuss how results from a data-driven technique, The Cannon, are included in DR14 and compare those with results from the APOGEE Stellar Parameters and Chemical Abundances Pipeline. We describe how using The Cannon in a mode that restricts the abundance analysis of each element to regions of the spectrum with known features from that element leads to Cannon abundances can lead to significantly different results for some elements than when all regions of the spectrum are used to derive abundances.</p>},
  articleno    = {125},
  author       = {Holtzman, Jon A. and Hasselquist, Sten and Shetrone, Matthew and Cunha, Katia and Prieto, Carlos Allende and Anguiano, Borja and Bizyaev, Dmitry and Bovy, Jo and Casey, Andrew and Edvardsson, Bengt and Johnson, Jennifer A. and Jönsson, Henrik and Meszaros, Szabolcs and Smith, Verne V. and Sobeck, Jennifer and Zamora, Olga and Chojnowski, S. Drew and Fernandez-Trincado, Jose and Hernandez, Anibal Garcia and Majewski, Steven R. and Pinsonneault, Marc and Souto, Diogo and Stringfellow, Guy S. and Tayar, Jamie and Troup, Nicholas and Zasowski, Gail},
  issn         = {0004-6256},
  keyword      = {methods: data analysis,stars: abundances,techniques: spectroscopic},
  language     = {eng},
  number       = {3},
  publisher    = {The American Astronomical Society},
  series       = {Astronomical Journal},
  title        = {APOGEE Data Releases 13 and 14 : Data and Analysis},
  url          = {http://dx.doi.org/10.3847/1538-3881/aad4f9},
  volume       = {156},
  year         = {2018},
}