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Ages of Red Giants in the Kepler and CoRoT Fields


Sample of stars with asteroseismic data to facilitate determination of parameters, including ages

Finding Targets

An object whose APOGEE_TARGET1 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.

bit name
Bit Target Description
APOGEE_DISK_RED_GIANT 22 asteroseismic target in Kepler or CoRoT sample


In addition to the 21 "APOGEE-Kepler" fields, APOGEE is targeting two fields observed by the CoRoT satellite (Baglin et al. 2006). These fields lie on opposite sides of the Galaxy, with COROTA at (l,b) ~ (212°, -2°) and COROTC at (l,b) ~ (38°, -8°). Because CoRoT stars probe the disk at a range of Galactocentric radii, they complement the Kepler sample stars, most of which lie near the solar circle. As with the Kepler sample, the seismic information available for the CoRoT stars permits the determination of fundamental stellar parameters, including age.

Primary contact

Courtney Epstein
The Ohio State University
epstein -at-

Other contacts

Jonathan Bird, Cristina Chiappini, Jennifer Johnson, David Lai, Marc Pinsonneault, Ralph Schonrich

Target Selection Details

The CoRoT set of RG stars with seismic detections was selected from the sample analyzed in Mosser et al. (2010). Approximately 120 stars were targeted in the COROTA field, and approximately 360 in COROTC.


Baglin, A., et al. 2006, in 36th COSPAR Scientific Assembly, Vol. 36, 3749
Mosser, B. et al. 2010, A&A, 517, 22