
Speaker:
Annika Peter
Institution:
Ohio State University

Date:
Tuesday, May 2, 2023
Time:
4:00 pm
Location:
NS2 1201
Abstract:
Models of self-interacting dark matter (SIDM)—models in which dark
matter can have up to strong-scale interactions with like particles in a
hidden sector—had their first heyday in the early 2000’s, to explain the
dearth of small galaxies near our Milky Way. In this talk, I will
explore why these models fell out of favor for a decade, and why they’ve
come roaring back since ~2010. I will show how small galaxies near the
Milky Way can probe a new type of cosmic SIDM phenomenology, and how
other observations on small scales can map out the allowed regions of
SIDM parameter space.
Host:
Paul Robertson