Planets Across Space and Time (PAST). I. Characterizing the Memberships of Galactic Components and Stellar Ages: Revisiting the Kinematic Methods and Applying to Planet Host Stars

no code implementations • 18 Feb 2021 • Di-Chang. Chen, Ji Wei Xie, Ji-Lin. Zhou, Subo Dong, Chao Liu, Hai-Feng Wang, Mao-Sheng Xiang, Yang Huang, Ali Luo, Zheng Zheng

The revised kinematic method and AVR as well as the stellar catalog of kinematic properties and ages lay foundation for future studies on exoplanets from two dimensions of space and time in the Galactic context.

Earth and Planetary Astrophysics Astrophysics of Galaxies Solar and Stellar Astrophysics

The Flare and Warp of the Young Stellar Disk traced with LAMOST DR5 OB-type stars

no code implementations • 1 Feb 2021 • Yang Yu, Hai-Feng Wang, Wen-Yuan Cui, Lin-Lin Li, Chao Liu, Bo Zhang, Hao Tian, Zhen-Yan Huo, Jie Ju, Zhi-Cun Liu, Fang Wen, Shuai Feng

We present analysis of the spatial density structure for the outer disk from 8$-$14 \, kpc with the LAMOST DR5 13534 OB-type stars and observe similar flaring on north and south sides of the disk implying that the flaring structure is symmetrical about the Galactic plane, for which the scale height at different Galactocentric distance is from 0. 14 to 0. 5 \, kpc.

Astrophysics of Galaxies