This issue came up in the context off what Gaia and Apogee synergies could hold, and in particular on the question of whether Apogee should change its targeting strategy or observation sequence to get better age information.
The two avenues I have pursued are:
-Observations and targeting of stars on the sub giant-branch with Apogee
-Repeat observations of giants within 2 parsecs, to compliment astrometric binary orbit solutions with two epoch velocities; A good orbit solution would yield a direct dynamical estimate of the giant mass, thereby constraining its age.
Next actions:
HWR should do estimates over holiday break, so as to present initial results at Seattle, Jan 9, 2015.
Define directions a low latitude
Look up APOGEE target selection criteria
get Besancon models for such criteria
estimate dynamical orbit distances and parallax accuracies
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