Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Inman, Derek"'
If long-range attractive forces exist and are stronger than gravity then cosmic halo formation can begin in the radiation-dominated era. We study a simple realization of this effect in a system where dark matter fermions have Yukawa interactions medi
Externí odkaz:
http://arxiv.org/abs/2304.13053
Autor:
Shao, Helen, Villaescusa-Navarro, Francisco, Villanueva-Domingo, Pablo, Teyssier, Romain, Garrison, Lehman H., Gatti, Marco, Inman, Derek, Ni, Yueying, Steinwandel, Ulrich P., Kulkarni, Mihir, Visbal, Eli, Bryan, Greg L., Angles-Alcazar, Daniel, Castro, Tiago, Hernandez-Martinez, Elena, Dolag, Klaus
We train graph neural networks on halo catalogues from Gadget N-body simulations to perform field-level likelihood-free inference of cosmological parameters. The catalogues contain $\lesssim$5,000 halos with masses $\gtrsim 10^{10}~h^{-1}M_\odot$ in
Externí odkaz:
http://arxiv.org/abs/2209.06843
Autor:
Inman, Derek, Kohri, Kazunori
We consider the consequences of a matter power spectrum which rises on small scales until eventually being cutoff by microphysical processes associated with the particle nature of dark matter. Evolving the perturbations of a weakly interacting massiv
Externí odkaz:
http://arxiv.org/abs/2207.14735
Autor:
Bird, Simeon, Albert, Andrea, Dawson, Will, Ali-Haimoud, Yacine, Coogan, Adam, Drlica-Wagner, Alex, Feng, Qi, Inman, Derek, Inomata, Keisuke, Kovetz, Ely, Kusenko, Alexander, Lehmann, Benjamin V., Munoz, Julian B., Singh, Rajeev, Takhistov, Volodymyr, Tsai, Yu-Dai
Primordial Black Holes (PBHs) are a viable candidate to comprise some or all of the dark matter and provide a unique window into the high-energy physics of the early universe. This white paper discusses the scientific motivation, current status, and
Externí odkaz:
http://arxiv.org/abs/2203.08967
Publikováno v:
2020 20th IEEE/ACM International Symposium on Cluster, Cloud and Internet Computing (CCGRID)
N-body simulations are essential tools in physical cosmology to understand the large-scale structure (LSS) formation of the Universe. Large-scale simulations with high resolution are important for exploring the substructure of universe and for determ
Externí odkaz:
http://arxiv.org/abs/2003.03931
Publikováno v:
Phys. Rev. Research 2, 023204 (2020)
Even if massive ($10\,M_\odot \lesssim M \lesssim 10^4 M_\odot$) primordial black holes (PBHs) can only account for a small fraction of the dark matter (DM) in the universe, they may still be responsible for a sizable fraction of the coalescence even
Externí odkaz:
http://arxiv.org/abs/2002.10771
Autor:
Inman, Derek, Yu, Hao-ran
The cosmic neutrino background is an important component of the Universe that is difficult to include in cosmological simulations due to the extremely large velocity dispersion of neutrino particles. We develop a new approach to simulate cosmic neutr
Externí odkaz:
http://arxiv.org/abs/2002.04601
Autor:
Bird, Simeon, Albert, Andrea, Dawson, Will, Ali-Haïmoud, Yacine, Coogan, Adam, Drlica-Wagner, Alex, Feng, Qi, Inman, Derek, Inomata, Keisuke, Kovetz, Ely, Kusenko, Alexander, Lehmann, Benjamin V., Muñoz, Julian B., Singh, Rajeev, Takhistov, Volodymyr, Tsai, Yu-Dai
Publikováno v:
In Physics of the Dark Universe August 2023 41
We analytically model the non-linear effects induced by massive neutrinos on the total matter power spectrum using the halo model reaction framework of Cataneo et al. 2019. In this approach the halo model is used to determine the relative change to t
Externí odkaz:
http://arxiv.org/abs/1909.02561
Autor:
Inman, Derek, Ali-Haïmoud, Yacine
Publikováno v:
Phys. Rev. D 100, 083528 (2019)
Cold dark matter (CDM) could be composed of primordial black holes (PBH) in addition to or instead of more orthodox weakly interacting massive particle dark matter (PDM). We study the formation of the first structures in such $\Lambda$PBH cosmologies
Externí odkaz:
http://arxiv.org/abs/1907.08129