Planets Across Space and Time (PAST). II: Catalog and Analyses of the LAMOST-Gaia-Kepler Stellar Kinematic Properties

Kavli Affiliate: Subo Dong

| First 5 Authors: Di-Chang Chen, Jia-Yi Yang, Ji-Wei Xie, Ji-Lin Zhou, Subo Dong

| Summary:

The Kepler telescope has discovered over 4,000 planets (candidates) by
searching ? 200,000 stars over a wide range of distance (order of kpc) in our
Galaxy. Characterizing the kinematic properties (e.g., Galactic component
membership and kinematic age) of these Kepler targets (including the planet
(candidate) hosts) is the first step towards studying Kepler planets in the
Galactic context, which will reveal fresh insights into planet formation and
evolution. In this paper, the second part of the Planets Across the Space and
Time (PAST) series, by combining the data from LAMOST and Gaia and then
applying the revised kinematic methods from PAST I, we present a catalog of
kinematic properties(i.e., Galactic positions, velocities, and the relative
membership probabilities among the thin disk, thick disk, Hercules stream, and
the halo) as well as other basic stellar parameters for 35,835 Kepler stars.
Further analyses of the LAMOST-Gaia-Kepler catalog demonstrate that our derived
kinematic age reveals the expected stellar activity-age trend. Furthermore, we
find that the fraction of thin(thick) disk stars increases (decreases) with the
transiting planet multiplicity (Np = 0, 1, 2 and 3+) and the kinematic age
decreases with Np, which could be a consequence of the dynamical evolution of
planetary architecture with age. The LAMOST-Gaia-Kepler catalog will be useful
for future studies on the correlations between the exoplanet distributions and
the stellar Galactic environments as well as ages.

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