Zobrazeno 1 - 10
of 281
pro vyhledávání: '"M. Sten"'
Autor:
Batell, Brian, Dienes, Keith R., Thomas, Brooks, Watson, Scott, Allahverdi, Rouzbeh, Amin, Mustafa, Boddy, Kimberly K., Delos, M. Sten, Erickcek, Adrienne L., Ghalsasi, Akshay, Giblin Jr., John T., Halverson, James, Huang, Fei, Long, Andrew J., Pearce, Lauren, Haghi, Barmak Shams Es, Shelton, Jessie, Shiu, Gary, Sinha, Kuver, Smith, Tristan L.
This document summarizes the discussions which took place during the PITT-PACC Workshop entitled "Non-Standard Cosmological Epochs and Expansion Histories," held in Pittsburgh, Pennsylvania, Sept. 5-7, 2024. Much like the non-standard cosmological ep
Externí odkaz:
http://arxiv.org/abs/2411.04780
Primordial black holes (PBHs) could compose the dark matter content of the Universe. We present the first simulations of cosmological structure formation with PBH dark matter that consistently include collisional few-body effects, post-Newtonian orbi
Externí odkaz:
http://arxiv.org/abs/2410.01876
Autor:
Delos, M. Sten
A moving mass makes a gravitational wake in the partially ionized interstellar medium, which acts as a lens for radio-frequency light. Consequently, plasma microlensing could complement gravitational microlensing in the search for invisible massive o
Externí odkaz:
http://arxiv.org/abs/2409.16348
Autor:
Ganjoo, Himanish, Delos, M. Sten
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 (EMDE). EMDEs amplify the matter power spectrum on small scales, leading
Externí odkaz:
http://arxiv.org/abs/2403.18893
Autor:
Rouzbeh Allahverdi, Mustafa A. Amin, Asher Berlin, Nicolas Bernal, Christian T. Byrnes, M. Sten Delos, Adrienne L. Erickcek, Miguel Escudero, Daniel G. Figueroa, Katherine Freese, Tomohiro Harada, Dan Hooper, David I. Kaiser, Tanvi Karwal, Kazunori Kohri, Gordan Krnjaic, Marek Lewicki, Kaloian D, Lozanov, Vivian Poulin, Kuver Sinha, Tristan L. Smith, Tomo Takahashi, Tommi Tenkanen, James Unwin, Ville Vaskonen, Scott Watson
Publikováno v:
The Open Journal of Astrophysics, Vol 4 (2021)
It is commonly assumed that the energy density of the Universe was dominated by radiation between reheating after inflation and the onset of matter domination 54,000 years later. While the abundance of light elements indicates that the Universe was r
Externí odkaz:
https://doaj.org/article/b4edf11253f44859a7be9f9b08edee66
Autor:
Delos, M. Sten
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 529, Issue 3, April 2024, Pages 2349-2355
Perturbations to stellar systems can reflect the gravitational influence of dark matter substructures. On scales much smaller than the size of a stellar system, we point out analytic connections between the stellar and dark matter distributions. In p
Externí odkaz:
http://arxiv.org/abs/2312.13338
Autor:
Delos, M. Sten
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 528, Issue 2, February 2024, Pages 1372-1387
Excursion set theory is a powerful and widely used tool for describing the distribution of dark matter haloes, but it is normally applied with simplifying approximations. We use numerical sampling methods to study the mass functions predicted by the
Externí odkaz:
http://arxiv.org/abs/2311.17986
Autor:
Delos, M. Sten
Publikováno v:
Phys. Rev. D 109, 023532 (2024)
Prompt $\rho\propto r^{-1.5}$ density cusps are the densest and most abundant dark matter systems. If the dark matter is a weakly interacting massive particle (WIMP), recent studies have shown that prompt cusps dominate the aggregate dark matter anni
Externí odkaz:
http://arxiv.org/abs/2310.15214
Autor:
Delos, M. Sten, Korsmeier, Michael, Widmark, Axel, Blanco, Carlos, Linden, Tim, White, Simon D. M.
Publikováno v:
Phys. Rev. D 109, 083512 (2024)
Recent studies indicate that thermally produced dark matter will form highly concentrated, low-mass cusps in the early universe that often survive until the present. While these cusps contain a small fraction of the dark matter, their high density si
Externí odkaz:
http://arxiv.org/abs/2307.13023
Autor:
Ganjoo, Himanish, Delos, M. Sten
Publikováno v:
JCAP04(2024)015
In cosmologies with an early matter-dominated era (EMDE) prior to Big Bang nucleosynthesis, the boosted growth of small-scale matter perturbations during the EMDE leads to microhalo formation long before halos would otherwise begin to form. For a ran
Externí odkaz:
http://arxiv.org/abs/2306.14961