Published December 3, 2015 | Version v1

DETERMINING AGES OF APOGEE GIANTS WITH KNOWN DISTANCES - Full PDFs

  • 1. New Mexico State University
  • 2. University of Toronto
  • 3. Osservatorio Astronomico di Padova
  • 4. University of Washington
  • 5. University of Virginia
  • 6. Large Synoptic Survey Telescope

Description

Supplementary data to Feuillet+ (2016, ApJ, arXiv:1511.04088):

Using the APOGEE survey instrument and the NMSU 1m telescope, we observe a sample of bright, nearby, red giant stars with known distances measured by Hipparcos. By applying Bayesian analysis and hierarchical modeling, we determine individual stellar ages and the star formation histories of single alpha-abundance subsamples. The probability distribution functions (PDFs) and modeled star formation histories (SFHs) of all stars analyzed in this paper.

Data included: APOGEE/2MASS ID, the age values for PDFs in log(age), the isochrone matching likelihood function as given in Equation 4 of paper, the age PDF of a Bayesian analysis using a flat SFH (Section 4.3), the hierarchically modeled SFH using an alpha-abundance dependent Gaussian+uniform model (Section 4.6), and the age PDF of an empirical Bayesian analysis using the hierarchically modeled SFH (Section 4.6). Individual ages of stars in the paper are taken as the mean of the age PDF, however, most PDFs are non-Gaussian, which introduces complicated errors into the selection of a single age.

Files

Files (630.7 kB)

Name Size Download all
md5:b6ad9100e6b6128c222a8ab3fd8a3bc3
630.7 kB Download

Additional details

Related works

Is supplement to
arXiv:1511.04088 (arXiv)