Tootfinder

The Effects of Linear Matter Power Spectrum Enhancement on Dark Matter Substructure
Ethan O. Nadler, Vera Gluscevic, Andrew Benson
https://arxiv.org/abs/2507.16889 https://

The Effects of Linear Matter Power Spectrum Enhancement on Dark Matter Substructure
We present cosmological dark matter (DM)--only zoom-in simulations of a Milky Way (MW) analog originating from enhanced linear matter power spectra $P(k)$ relative to the standard cold, collisionless DM (CDM) cosmology. We consider a Gaussian power excess in $P(k)$ followed by a cutoff in select cases; this behavior could arise from early-universe physics that alters the primordial matter power spectrum or DM physics in the radiation-dominated epoch. We find that enhanced initial conditions (IC…

Optical Counterparts to X-ray sources in LSST DP1
Yuankun (David), Wang, Eric C. Bellm, Robert I. Hynes, Yue Zhao, Poshak Gandhi, Liliana Rivera Sandoval, Sandro Campos, Neven Caplar, Melissa DeLucchi, Konstantin Malanchev, Tobin M. Wainer
https://arxiv.org/abs/2507.14400

Optical Counterparts to X-ray sources in LSST DP1
We present a crossmatch between a combined catalog of X-ray sources and the Vera C. Rubin Observatory Data Preview 1 (DP1) to identify optical counterparts. The six fields targeted as part of DP1 include the Extended Chandra Deep Field South (E-CDF-S), the Euclid Deep Field South (EDF-S), the Fornax Dwarf Spheroidal Galaxy (Fornax dSph), 47 Tucanae (47 Tuc) and science validation fields with low galactic and ecliptic latitude (SV\_95\_-25 and SV\_38\_7, respectively). We find matches to 2314 of…