APOGEE Data Releases 13 and 14: Data and Analysis

Jon A. Holtzman, Sten Hasselquist, Matthew Shetrone, Katia Cunha, Carlos Allende Prieto, Borja Anguiano, Dmitry Bizyaev, Jo Bovy, Andrew Casey, Bengt Edvardsson, Jennifer A. Johnson, Henrik Jönsson, Szabolcs Meszaros, Verne V. Smith, Jennifer Sobeck, Olga Zamora, S. Drew Chojnowski, Jose Fernandez-Trincado, Anibal Garcia Hernandez, Steven R. MajewskiMarc Pinsonneault, Diogo Souto, Guy S. Stringfellow, Jamie Tayar, Nicholas Troup, Gail Zasowski

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67 Citations (Scopus)

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 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.

Original languageEnglish
Article number125
Number of pages24
JournalAstronomical Journal
Volume156
Issue number3
DOIs
Publication statusPublished - 1 Sep 2018

Keywords

  • methods: data analysis
  • stars: abundances
  • techniques: spectroscopic

Cite this

Holtzman, J. A., Hasselquist, S., Shetrone, M., Cunha, K., Prieto, C. A., Anguiano, B., Bizyaev, D., Bovy, J., Casey, A., Edvardsson, B., Johnson, J. A., Jönsson, H., Meszaros, S., Smith, V. V., Sobeck, J., Zamora, O., Chojnowski, S. D., Fernandez-Trincado, J., Hernandez, A. G., ... Zasowski, G. (2018). APOGEE Data Releases 13 and 14: Data and Analysis. Astronomical Journal, 156(3), [125]. https://doi.org/10.3847/1538-3881/aad4f9