3 papers
astro-ph.CO2026
SN 2022riv in RX J2129: Discovery, Spectroscopic Classification, and Microlensing of a Strongly Lensed Type Ia Supernova from JWST and HST Observations
Birendra Dhanasingham, Patrick L. Kelly, Wenlei Chen +27
The multiply imaged SN 2022riv was discovered through a search of galaxy cluster fields as part of a Hubble Space Telescope (HST) SNAP program to find highly magnified stars. The s…
astro-ph.GA2025
Addressing the core-cusp and diversity problem of dwarf and disk galaxies using cold collisionless DARKexp theory
Liliya L. R. Williams, Jens Hjorth, Evan D. Skillman
Dwarf galaxies are observed to have linearly rising rotation curves, which indicate constant density cores in their centers. These do not arise naturally from dark matter only simu…
astro-ph.CO2025
Entropy Evolution Towards DARKexp of IllustrisTNG Dark Matter Halos
Ashley Francis, Liliya L. R. Williams, Jens Hjorth
Dark matter (DM) halos simulated via N-body techniques are known to exhibit nearly universal profiles at equilibrium; however, their origin remains uncertain despite thorough inves…