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8 papers · 2 filters
Constraints on the properties of MSM dark matter using the satellite galaxies of the Milky Way
Oliver Newton, Mark R. Lovell, Carlos S. Frenk +4
Low-mass galaxies provide a powerful tool with which to investigate departures from the standard cosmological paradigm in models that suppress the abundance of small dark matter st…
Elevated UV luminosity density at Cosmic Dawn explained by non-evolving, weakly mass-dependent star formation efficiency
Robert Feldmann, Michael Boylan-Kolchin, James S. Bullock +11
Recent observations with the James Webb Space Telescope (JWST) have uncovered unexpectedly high cosmic star formation activity in the early Universe, mere hundreds of millions of y…
Dark matter coupled to radiation: Limits from the Milky Way satellites
Wendy Crumrine, Ethan O. Nadler, Rui An +1
Interactions between dark matter (DM) and relativistic particles at early times suppress structure formation on small scales. In particular, the scattering process transfers heat a…
Testing the parametric model for self-interacting dark matter using matched halos in cosmological simulations
Daneng Yang, Ethan O. Nadler, Hai-Bo Yu
We systemically evaluate the performance of the self-interacting dark matter (SIDM) halo model proposed in arXiv:2305.16176 with matched halos from high-resolution cosmological CDM…
Lensed Type Ia Supernova "Encore" at z=2: The First Instance of Two Multiply-Imaged Supernovae in the Same Host Galaxy
J. D. R. Pierel, A. B. Newman, S. Dhawan +60
A bright (=24 mag), supernova (SN) candidate was discovered in JWST/NIRCam imaging acquired on 2023 November 17. The SN is quintuply-imaged as a result o…
Limits on Early Matter Domination from the Isotropic Gamma-Ray Background
Himanish Ganjoo, M. Sten Delos
In cosmologies with hidden sector dark matter, the lightest hidden sector species can come to dominate the energy budget of the universe and cause an early matter-dominated era (EM…