LSST France (june 2026)
2026-05-20·
·
0 min read
Matthieu Pelissier
Abstract
Dark matter subhalos with masses from 10⁶ to 10⁹ solar masses are mostly invisible, but could impact the structure of stellar streams observed by Rubin-LSST. We present a quantitative study of how LSST systematics affect density-fluctuation measurements used to constrain dark matter. Our results show that systematics increase the minimum detectable subhalo mass by a factor of ~2. This project coming to an end, a DESC paper with our findings is in preparation.
Date
2026-05-20
Event
Location
LAPP, Annecy
