January 12, 2022
"Stellar streams can come either from disrupting galaxies or star clusters," said Asst. Prof. Alex Ji at the University of Chicago, a co-author on the study. "Stars stripped from a cluster all have the same chemical composition because they are born at the same time, while stars stripped from a galaxy have differing compositions. These two types of streams provide different insights into the nature of dark matter."
Other UChicago co-authors on the paper were Nora Shipp, PhD’21, now at MIT; undergraduate student Kiyan Tavangar, BS’21; and Asst. Prof. Alex Drlica-Wagner.