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14 papers · 2 filters
Cosmological Simulations of Two-Component Wave Dark Matter
Hsinhao Huang, Hsi-Yu Schive, Tzihong Chiueh
Wave (fuzzy) dark matter (DM) consists of ultralight bosons, featuring a solitonic core within a granular halo. Here we extend DM to two components, with distinct particle ma…
Threshold of Primordial Black Hole Formation against Velocity Dispersion in Matter-Dominated Era
Tomohiro Harada, Kazunori Kohri, Misao Sasaki +2
We study the effects of velocity dispersion on the formation of primordial black holes~(PBHs) in a matter-dominated era. The velocity dispersion is generated through the nonlinear…
Logarithmic Duality of the Curvature Perturbation
Shi Pi, Misao Sasaki
We study the comoving curvature perturbation in the single-field inflation models whose potential can be approximated by a piecewise quadratic potential by usi…
Super-horizon resonant magnetogenesis during inflation
Misao Sasaki, Valeri Vardanyan, Vicharit Yingcharoenrat
We propose a novel mechanism for significantly enhancing the amplitude of primordial electromagnetic fields during inflation. Similar to existing proposals, our idea is based on pa…
Gravitational waves from rapid structure formation on microscopic scales before matter-radiation equality
Marcos M. Flores, Alexander Kusenko, Misao Sasaki
The existence of scalar fields can be probed by observations of stochastic gravitational waves. Scalar fields mediate attractive forces, usually stronger than gravity, on the lengt…
Target Selection and Validation of DESI Emission Line Galaxies
A. Raichoor, J. Moustakas, Jeffrey A. Newman +48
The Dark Energy Spectroscopic Instrument (DESI) will precisely constrain cosmic expansion and the growth of structure by collecting 40 million extra-galactic redshifts across…