Kepler Cool Dwarfs
APOGEE spectra of bright, cool dwarf stars with Kepler lightcurves were taken to measure stellar parameters, in particular, metallicity and abundance ratios, with the goals of estimating rotation-based ages and deriving the age-metallicity relation for low-mass stars in the Kepler field.
An object whose
APOGEE_TARGET2 value includes one or more of the bitmasks in the following table was targeted for spectroscopy as part of this ancillary target program. See SDSS-III bitmasks to learn how to use these values to identify objects in this ancillary target program.
|APOGEE_TARGET2 bit name||Bit||Target Description|
|APOGEE_KEPLER_COOLDWARF||16||Kepler cool dwarf or subgiant|
|Jennifer van Saders|
Target Selection Details
Stars with photometric data that have log(g) > 4.0 , 7 < Hmag < 11, according to the Kepler Input Catalog (Brown et al. 2011) , and effective temperature < 5500 K, according to Pinsonneault et al. 2012, were targeted. In addition, 48 M dwarfs that have extensive photometric data, but were slightly fainter than H=11, were included in the sample.
Brown et al. 2011, AJ, 142, 112
Pinsonneault et al. 2012, ApJS, 199, 30