Zobrazeno 1 - 10
of 631
pro vyhledávání: '"Anzuini, A"'
Autor:
Anzuini, Filippo, Maggi, Angelo
The relic density of dark matter in the $\Lambda$CDM model restricts the parameter space for a cosmological axion field, constraining the axion decay constant, the initial amplitude of the axion field and the axion mass. It is shown via lattice simul
Externí odkaz:
http://arxiv.org/abs/2401.11822
Compact objects such as neutron stars and white dwarfs can source axion-like particles and QCD axions due to CP-violating axion-fermion couplings. The magnitude of the axion field depends on the stellar density and on the strength of the axion-fermio
Externí odkaz:
http://arxiv.org/abs/2311.13776
Autor:
Anzuini, Filippo, Pons, José A., Gómez-Bañón, Antonio, Lasky, Paul D., Bianchini, Federico, Melatos, Andrew
The coupling between axions and photons modifies Maxwell's equations, introducing a dynamo term in the magnetic induction equation. In neutron stars, for critical values of the axion decay constant and axion mass, the magnetic dynamo mechanism increa
Externí odkaz:
http://arxiv.org/abs/2211.10863
The dissipation of intense crustal electric currents produces high Joule heating rates in cooling neutron stars. Here it is shown that Joule heating can counterbalance fast cooling, making it difficult to infer the presence of hyperons (which acceler
Externí odkaz:
http://arxiv.org/abs/2205.14793
Neutron star models with maximum mass close to $2 \ M_{\odot}$ reach high central densities, which may activate nucleonic and hyperon direct Urca neutrino emission. To alleviate the tension between fast theoretical cooling rates and thermal luminosit
Externí odkaz:
http://arxiv.org/abs/2110.14039
Publikováno v:
In International Economics August 2024 178
Autor:
Anzuini, Filippo, Bell, Nicole F., Busoni, Giorgio, Motta, Theo F., Robles, Sandra, Thomas, Anthony W., Virgato, Michael
Publikováno v:
JCAP 11 (2021) 056; Erratum: JCAP 04 (2024) E02
We consider the capture of dark matter (DM) in neutron stars via scattering on hadronic targets, including neutrons, protons and hyperons. We extend previous analyses by including momentum dependent form factors, which account for hadronic structure,
Externí odkaz:
http://arxiv.org/abs/2108.02525
Autor:
Anzuini, Filippo, Melatos, Andrew
A quark-magnetic Ginzburg-Landau (qHGL) gradient expansion of the free energy of two-flavor inhomogeneous quark matter in a magnetic field $H$ is derived analytically. It can be applied away from the Lifshitz point, generalizing standard Ginzburg-Lan
Externí odkaz:
http://arxiv.org/abs/2106.04744
Autor:
Anzuini, F., Melatos, A.
Analytic arguments have been advanced that the degree of differential rotation in a neutron star depends on whether the topology of the internal magnetic field is open or closed. To test this assertion, the ideal-magnetohydrodynamics solver PLUTO is
Externí odkaz:
http://arxiv.org/abs/2003.13851
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