Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Gosenca, Mateja"'
Ultralight dark matter (ULDM) is an interesting alternative to the cold dark matter (CDM) paradigm. Due to the extremely low mass of the constituent particle ($\sim 10^{-22}$ eV), ULDM can exhibit quantum effects up to kiloparsec scales. In particula
Externí odkaz:
http://arxiv.org/abs/2305.10340
Autor:
Musoke, Nathan, Kendall, Emily, Gosenca, Mateja, Guo, Lillian, Low, Lerh Feng, Xue, Angela, Easther, Richard
In this Working Paper we analyse computational strategies for using aggregated spatio-temporal population data acquired from telecommunications networks to infer travel and movement patterns between geographical regions. Specifically, we focus on hou
Externí odkaz:
http://arxiv.org/abs/2303.17758
Autor:
Gosenca, Mateja, Eberhardt, Andrew, Wang, Yourong, Eggemeier, Benedikt, Kendall, Emily, Zagorac, J. Luna, Easther, Richard
Ultralight dark matter (ULDM) is usually taken to be a single scalar field. Here we explore the possibility that ULDM consists of $N$ light scalar fields with only gravitational interactions. This configuration is more consistent with the underlying
Externí odkaz:
http://arxiv.org/abs/2301.07114
Publikováno v:
Phys. Rev. D 102, 083518 (2020)
The distinctive effects of fuzzy dark matter are most visible at non-linear galactic scales. We present the first simulations of mixed fuzzy and cold dark matter, obtained with an extended version of the Nyx code. Fuzzy (or ultralight, or axion-like)
Externí odkaz:
http://arxiv.org/abs/2007.08256
Publikováno v:
Phys. Rev. D 100, 023506 (2019)
We recently showed that postulated ultracompact minihalos with a steep density profile do not form in realistic simulations with enhanced initial perturbations. In this paper we assume that a small fraction of the dark matter consists of primordial b
Externí odkaz:
http://arxiv.org/abs/1901.08528
Publikováno v:
Phys. Rev. D 99, 083524 (2019)
We chart a path toward solving for the nonlinear gravitational dynamics of cold dark matter by relying on a semiclassical description using the propagator. The evolution of the propagator is given by a Schr\"odinger equation, where the small paramete
Externí odkaz:
http://arxiv.org/abs/1812.05633
Publikováno v:
Phys. Rev. D 96, 123519 (2017)
We perform three-dimensional simulations of structure formation in the early Universe, when boosting the primordial power spectrum on approximately kpc scales. We demonstrate that our simulations are capable of producing power-law profiles close to t
Externí odkaz:
http://arxiv.org/abs/1710.02055
Publikováno v:
Phys. Rev. D 93, 023526 (2016)
Within a cosmological context, we study the behaviour of collisionless particles in the weak field approximation to General Relativity, allowing for large gradients of the fields and relativistic velocities for the particles. We consider a sphericall
Externí odkaz:
http://arxiv.org/abs/1509.01163
Autor:
Gosenca, Mateja, Coles, Peter
Publikováno v:
The Open Journal of Astrophysics, 2016
We explore the dynamical behaviour of cosmological models involving a scalar field (with an exponential potential and a canonical kinetic term) and a matter fluid with spatial curvature included in the equations of motion. Using appropriately defined
Externí odkaz:
http://arxiv.org/abs/1502.04020
We develop a needlet approach to estimate the amplitude of general (including non-separable) bispectra and trispectra in the cosmic microwave background, and apply this to the WMAP 9-year data. We obtain estimates for the `orthogonal' bispectrum mode
Externí odkaz:
http://arxiv.org/abs/1310.8617