Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Upadhye, Amol"'
Observational cosmology is rapidly closing in on a measurement of the sum M_nu of neutrino masses, at least in the simplest cosmologies, while opening the door to probes of non-standard hot dark matter (HDM) models. By extending the method of effecti
Externí odkaz:
http://arxiv.org/abs/2410.05815
We generalise the SuperEasy linear response method, originally developed to describe massive neutrinos in cosmological $N$-body simulations, to any hot dark matter (HDM) species with arbitrary momentum distributions. The method uses analytical soluti
Externí odkaz:
http://arxiv.org/abs/2410.05816
Autor:
Upadhye, Amol, Kwan, Juliana, McCarthy, Ian G., Salcido, Jaime, Moran, Kelly R., Lawrence, Earl, Wong, Yvonne Y. Y.
Cosmology is poised to measure the neutrino mass sum $M_\nu$ and has identified several smaller-scale observables sensitive to neutrinos, necessitating accurate predictions of neutrino clustering over a wide range of length scales. The FlowsForTheMas
Externí odkaz:
http://arxiv.org/abs/2311.11240
Autor:
McCarthy, Ian G., Salcido, Jaime, Schaye, Joop, Kwan, Juliana, Elbers, Willem, Kugel, Roi, Schaller, Matthieu, Helly, John C., Braspenning, Joey, Frenk, Carlos S., van Daalen, Marcel P., Vandenbroucke, Bert, Conley, Jonah T., Font, Andreea S., Upadhye, Amol
A number of recent studies have found evidence for a tension between observations of large-scale structure (LSS) and the predictions of the standard model of cosmology with the cosmological parameters fit to the cosmic microwave background (CMB). The
Externí odkaz:
http://arxiv.org/abs/2309.07959
Autor:
Upadhye, Amol, Kwan, Juliana, McCarthy, Ian G., Salcido, Jaime, Helly, John C., Kugel, Roi, Schaller, Matthieu, Schaye, Joop, Braspenning, Joey, Elbers, Willem, Frenk, Carlos S., van Daalen, Marcel P., Vandenbroucke, Bert, Broxterman, Jeger C.
Weak lensing of the cosmic microwave background is rapidly emerging as a powerful probe of neutrinos, dark energy, and new physics. We present a fast computation of the non-linear CMB lensing power spectrum which combines non-linear perturbation theo
Externí odkaz:
http://arxiv.org/abs/2308.09755
Upcoming large-scale structure surveys will measure the matter power spectrum to approximately percent level accuracy with the aim of searching for evidence for new physics beyond the standard model of cosmology. In order to avoid biasing our conclus
Externí odkaz:
http://arxiv.org/abs/2305.09710
Velocity dispersion of the massive neutrinos presents a daunting challenge for non-linear cosmological perturbation theory. We consider the neutrino population as a collection of non-linear fluids, each with uniform initial momentum, through an exten
Externí odkaz:
http://arxiv.org/abs/2210.16020
Simulation of the cosmic clustering of massive neutrinos is a daunting task, due both to their large velocity dispersion and to their weak clustering power becoming swamped by Poisson shot noise. We present a new approach, the multi-fluid hybrid-neut
Externí odkaz:
http://arxiv.org/abs/2210.16012
Autor:
Moran, Kelly R., Heitmann, Katrin, Lawrence, Earl, Habib, Salman, Bingham, Derek, Upadhye, Amol, Kwan, Juliana, Higdon, David, Payne, Richard
Modern cosmological surveys are delivering datasets characterized by unprecedented quality and statistical completeness; this trend is expected to continue into the future as new ground- and space-based surveys come online. In order to maximally extr
Externí odkaz:
http://arxiv.org/abs/2207.12345
Publikováno v:
JCAP04(2021)078
We present in this work a novel and yet extremely simple method for incorporating the effects of massive neutrinos in cosmological $N$-body simulations. This so-called "SuperEasy linear response" approach is based upon analytical solutions to the col
Externí odkaz:
http://arxiv.org/abs/2011.12504