16 papers
Cold Dark Matter and Self-Interacting Dark Matter Interpretations of Cloud-9
Morgan Ohana, Xingyu Zhang, Hai-Bo Yu
Recently, the Five-hundred-meter Aperture Spherical Telescope discovered a gas-rich hydrogen cloud near M94 in the band. Lacking an optical counterpart, this object,…
Strong-lensing Perturber Signatures in Self-interacting Dark Matter Simulations
Demao Kong, Ethan O. Nadler, Hai-Bo Yu
The paper uses self-interacting dark matter (SIDM) simulations to study low‑mass perturbers seen in strong gravitational lensing, showing that SIDM halos evolve through core‑expans…
The dark fate of ultra-faint dwarfs: Gravothermal collapse in action
Moritz S. Fischer, Hai-Bo Yu
Ultra-faint dwarf (UFD) galaxies are a promising probe for dark matter (DM) physics as they are the most DM-dominated systems known. The Milky Way (MW) hosts many UFDs for which th…
SIDM and CDM interpretations of the million-solar-mass lensing perturber JVAS B1938+666-
Xingyu Zhang, Hai-Bo Yu
A object has recently been inferred from gravitational imaging of the strong-lensing system JVAS B1938+666, exhibiting an unusually dense inner region embedded with…
Gravothermal Collapse: Robust Against Baryonic Feedback
Demao Kong, Hai-Bo Yu
We perform a stress test of gravothermal collapse in self-interacting dark matter (SIDM) halos under baryonic feedback using a semi-analytical oscillating-potential model in contro…
Accurately simulating core-collapse self-interacting dark matter halos
Moritz S. Fischer, Hai-Bo Yu, Klaus Dolag
The properties of satellite halos provide a promising probe for dark matter (DM) physics. Observations have motivated current efforts to explain surprisingly compact DM halos. If D…