Mock Observations of Multiple Stellar Populations in Tidal Streams of Palomar 5 for the Chinese Space Station Survey Telescope
Xia Li, Long Wang, Chengyuan Li, Yang Chen, Hao Tian, Xin Zhang

TL;DR
This study assesses the capability of the upcoming Chinese Space Station Survey Telescope to detect multiple stellar populations in the Palomar 5 stellar stream, finding current limitations due to distance and proper motion measurement challenges.
Contribution
The paper provides a feasibility analysis of using CSST/SC for MP detection in distant stellar streams, highlighting the need for multi-epoch observations and proper motion data.
Findings
CSST/SC cannot resolve MPs in streams beyond 8 kpc with single exposures.
Proper motion data is essential for disentangling stream members at large distances.
Multi-epoch, multi-band observations are necessary for future MP studies of Palomar 5.
Abstract
Observations show that multiple stellar populations (MPs) are ubiquitous in globular clusters. The Hubble Space Telescope (HST) has been a pivotal tool for previous photometric studies of MPs. The Chinese Space Station Survey Telescope (CSST) is a two-meter telescope scheduled for launch. One of its imaging instruments, the Survey Camera (SC), combines ultraviolet sensitivity comparable to that of HST with a significantly larger field of view, making it well-suited for conducting large-scale photometric surveys of MPs within extensive stellar stream structures. In this work, we perform mock observations of the stellar stream Palomar 5 to assess the feasibility of detecting MPs with the CSST/SC. The results indicate that the CSST/SC cannot resolve MPs in stellar streams at distances comparable to Palomar 5 ( kpc) with one or ten 150 s exposures. This fundamental limitation…
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astronomy and Astrophysical Research · Astrophysics and Star Formation Studies
