Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Bamber, Jamie"'
The oscillation modes of neutron star (NS) merger remnants, as encoded by the kHz postmerger gravitational wave (GW) signal, hold great potential for constraining the as-yet undetermined equation of state (EOS) of dense nuclear matter. Previous works
Externí odkaz:
http://arxiv.org/abs/2411.00943
Recent nonmagnetized studies of binary neutron star mergers have indicated the possibility of identifying equation of state features, such as a phase transition or a quark-hadron crossover, based on the frequency shift of the main peak in the postmer
Externí odkaz:
http://arxiv.org/abs/2411.00939
Publikováno v:
Phys. Rev. D 110, 024046 (2024)
GW170817 and GRB 170817A provided direct evidence that binary neutron star (NSNS) mergers can produce short gamma-ray bursts (sGRBs). However, questions remain about the nature of the central engine. Depending on the mass, the remnant from a NSNS mer
Externí odkaz:
http://arxiv.org/abs/2405.03705
For dark matter to be detectable with gravitational waves from binary black holes, it must reach higher than average densities in their vicinity. In the case of light (wave-like) dark matter, the density of dark matter between the binary can be signi
Externí odkaz:
http://arxiv.org/abs/2311.18156
Autor:
Aurrekoetxea, Josu C., Bamber, Jamie, Brady, Sam E., Clough, Katy, Helfer, Thomas, Marsden, James, Traykova, Dina, Wang, Zipeng
GRDzhadzha is an open-source code for relativistic simulations of matter fields on curved spacetimes that admit an analytic description (e.g. stationary black holes). It is based on the publicly available 3+1D numerical relativity code GRChombo. Such
Externí odkaz:
http://arxiv.org/abs/2308.08299
The interaction of binary black hole mergers with their environments can be studied using numerical relativity simulations. These start only a short finite time before merger, at which point appropriate initial conditions must be imposed. A key task
Externí odkaz:
http://arxiv.org/abs/2210.09254
Autor:
Bamber, Jamie
I discuss how one can apply the covariant formalism developed by Vilkovisky and DeWitt to obtain frame invariant fifth force calculations for scalar-tensor theories. Fifth forces are severely constrained by astrophysical measurements. It was shown pr
Externí odkaz:
http://arxiv.org/abs/2210.06396
Autor:
Andrade, Tomas, Salo, Llibert Areste, Aurrekoetxea, Josu C., Bamber, Jamie, Clough, Katy, Croft, Robin, de Jong, Eloy, Drew, Amelia, Duran, Alejandro, Ferreira, Pedro G., Figueras, Pau, Finkel, Hal, França, Tiago, Ge, Bo-Xuan, Gu, Chenxia, Helfer, Thomas, Jäykkä, Juha, Joana, Cristian, Kunesch, Markus, Kornet, Kacper, Lim, Eugene A., Muia, Francesco, Nazari, Zainab, Radia, Miren, Ripley, Justin, Shellard, Paul, Sperhake, Ulrich, Traykova, Dina, Tunyasuvunakool, Saran, Wang, Zipeng, Widdicombe, James Y., Wong, Kaze
Publikováno v:
Journal of Open Source Software, 6(68), 3703, 2021
GRChombo is an open-source code for performing Numerical Relativity time evolutions, built on top of the publicly available Chombo software for the solution of PDEs. Whilst GRChombo uses standard techniques in NR, it focusses on applications in theor
Externí odkaz:
http://arxiv.org/abs/2201.03458
Publikováno v:
Phys. Rev. D 103, 124013 (2021)
The ringdown of a perturbed black hole contains fundamental information about space-time in the form of Quasi Normal Modes (QNM). Modifications to general relativity, or extended profiles of other fields surrounding the black hole, so called "black h
Externí odkaz:
http://arxiv.org/abs/2103.00026
Publikováno v:
Phys. Rev. D 103, 044059 (2021)
Scalar fields around compact objects are of interest for scalar-tensor theories of gravity and dark matter models consisting of a massive scalar, e.g. axions. We study the behaviour of a scalar field around a Kerr black hole with non trivial asymptot
Externí odkaz:
http://arxiv.org/abs/2011.07870