The Astronomical Journal· 2018Q1
APOGEE Data Releases 13 and 14: Data and Analysis
- 274citations
- Q1SCImago
- 2018year
Short summary
APOGEE Data Releases 13 and 14 introduce improved handling of telluric absorption and persistence, alongside new analysis from The Cannon technique, which yields different elemental abundances compared to the standard pipeline.
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Key points
- Data Releases 13 and 14 improve upon DR12 by refining the handling of telluric absorption and detector persistence.
- The Cannon, a data-driven technique, is integrated into DR14, offering an alternative to the standard APOGEE pipeline.
- Using The Cannon with restricted spectral regions for abundance analysis leads to notably different results for certain elements compared to using the entire spectrum.
- Known calibration issues for effective temperatures (DR13), surface gravity (DR13 & DR14), and C/N abundances in dwarfs (DR13 & DR14) are highlighted.
AI-generated from the title and abstract; the full text is not read.
Abstract
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.
The authors' abstract, as published at the source. The Astronomical Journal, 2018 · DOI ↗
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Field: Instrumentation
InstrumentationPhysics and Astronomy