Discovery of two nearby post-T Tauri stellar associations

we report the discovery of 2 new stellar associations in close vicinity of the Sun at roughly 180 and 150 pc. These two associations, named as u Tau assoc and e Tau assoc, were detected based on their clustering in a multi-dimensional parameter space including Gaia coordinates, proper motion, and parallax. The fitting of pre-main-sequence model isochrones in their color-magnitude diagrams suggests that the two associations are of about 50 Myr old and the group members lower than ∼0.8 M⊙ are at the stage of post-T Tauri.

Speaker: 
Dr. Jiaming LIU @NAOC
Location: 
Zoom Meeting ID: 460 656 365
Time: 
Wed, 2020-03-25 14:00 to 14:30