Kavli Affiliate: Gregory J. Herczeg
| First 5 Authors: Xiao-Long Wang, Min Fang, Yu Gao, Hong-Xin Zhang, Gregory J. Herczeg
| Summary:
Identifying the young optically visible population in a star-forming region
is essential for fully understanding the star formation event. In this paper,
We identify 211 candidate members of the Perseus molecular cloud based on Gaia
astronomy. We use LAMOST spectra to confirm that 51 of these candidates are new
members, bringing the total census of known members to 856. The newly confirmed
members are less extincted than previously known members. Two new stellar
aggregates are identified in our updated census. With the updated member list,
we obtain a statistically significant distance gradient of $rm
4.84;pc;deg^{-1}$ from west to east. Distances and extinction corrected
color-magnitude diagrams indicate that NGC 1333 is significantly younger than
IC 348 and the remaining cloud regions. The disk fraction in NGC 1333 is higher
than elsewhere, consistent with its youngest age. The star formation scenario
in the Perseus molecular cloud is investigated and the bulk motion of the
distributed population is consistent with the cloud being swept away by the
Per-Tau Shell.
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