Early Results from APOKASC

TL;DR

APOKASC combines asteroseismology and spectroscopy to improve stellar property measurements, testing scaling relations in metal-poor stars and calibrating spectroscopic parameters with seismic data, enabling advanced stellar research.

Contribution

First application of asteroseismic scaling tests in metal-poor stars and calibration of spectroscopic parameters using seismic measurements in APOKASC.

Findings

Tested asteroseismic scaling relations in metal-poor stars

Calibrated spectroscopic parameters with seismic data

Provided a well-characterized sample of red giants

Abstract

Asteroseismology and spectroscopy provide complementary constraints on the fundamental and chemical properties of stars. I describe the first results from APOKASC, a collaboration between the Kepler asteroseismic science consortium (KASC) and the SDSS-III APOGEE survey. These include (1) the first test of asteroseismic scaling relationships in the metal-poor regime using halo and thick disk stars identified in the APOKASC sample; and (2) the calibration of spectroscopic parameters using precise asteroseismic measurements of surface gravity. I also highlight future research avenues that are made possible by this unique sample of thousands of well-characterized red giant stars.