Bibcode
Arfon Williams, R.; Bosley, Corinne; Jones, Hayden; Schiavon, Ricardo P.; Allende-Prieto, C.; Bizyaev, Dmitry; Carrera, R.; Cunha, Katia M. L.; Nguyen, Duy; Feuillet, Diane; Frinchaboy, Peter M.; García Pérez, A. E.; Hasselquist, Sten; Hayden, Michael R.; Hearty, Fred R.; Holtzman, Jon A.; Johnson, Jennifer; Majewski, Steven R.; Meszaros, Szabolcs; Nidever, David L.; Shetrone, Matthew D.; Smith, Verne V.; Sobeck, Jennifer; Troup, Nicholas William; Wilson, John C.; Zasowski, Gail
Bibliographical reference
American Astronomical Society, AAS Meeting #225, #340.02
Advertised on:
1
2015
Citations
0
Refereed citations
0
Description
The Apache Point Galactic Evolution Experiment (APOGEE) forms part of
the third Sloan Digital Sky Survey and has obtained high resolution,
high signal-to-noise infrared spectra for ~1.3 x 105 stars
across the galactic bulge, disc and halo. From these, stellar parameters
are derived together with abundances for various elements using the
APOGEE Stellar Parameters and Chemical Abundance Pipeline (ASPCAP). In
this poster we report preliminary results from application of an
alternative stellar parameters and abundances pipeline, based on
measurements of equivalent widths of absorption lines in APOGEE spectra.
The method is based on a sequential grid inversion algorithm, originally
designed for the derivation of ages and elemental abundances of stellar
populations from line indices in their integrated spectra. It allows for
the rapid processing of large spectroscopic data sets from both current
and future surveys, such as APOGEE and APOGEE 2, and it is easily
adaptable for application to other very large data sets that are
being/will be generated by other massive surveys of the stellar
populations of the Galaxy. It will also allow the cross checking of
ASPCAP results using an independent method. In this poster we present
preliminary results showing estimates of effective temperature and iron
abundance [Fe/H] for a subset of the APOGEE sample, comparing with DR12
numbers produced by the ASPCAP pipeline.