Zobrazeno 1 - 10
of 294
pro vyhledávání: '"Krüger, Christian A."'
Publikováno v:
Phys. Rev. D108, 124056 (2023)
We provide accurate universal relations that allow to estimate the moment of inertia $I$ and the ratio of kinetic to gravitational binding energy $T/W$ of uniformly rotating neutron stars from the knowledge of mass, radius, and moment of inertia of a
Externí odkaz:
http://arxiv.org/abs/2309.05643
Neutron stars in Gauss-Bonnet gravity -- nonlinear scalarization and gravitational phase transitions
It was recently discovered that scalarized neutron stars in scalar-tensor theories can undergo a gravitational phase transition to a non-scalarized (GR) state. Surprisingly, even though the driving mechanism is totally different, the process resemble
Externí odkaz:
http://arxiv.org/abs/2306.16988
Buoyancy-restored modes inside neutron stars depend sensitively on both the microphysical (e.g., composition and entropy gradients) and macrophysical (e.g., stellar mass and radius) properties of the star. Asteroseismology efforts for $g$-modes are t
Externí odkaz:
http://arxiv.org/abs/2204.08492
Publikováno v:
Phys.Rev.D 105 (2022) 12, 124071
We demonstrate how observables of slowly rotating neutron stars can be used to constrain the nuclear equation of state. By building a Bayesian framework we demonstrate how combining different types of neutron star measurements, motivated by the upcom
Externí odkaz:
http://arxiv.org/abs/2203.05555
Publikováno v:
Front. Astron. Space Sci. 8:736918 (2021)
In this review article, we present the main results from our most recent research concerning the oscillations of fast rotating neutron stars. We derive a set of time evolution equations for the investigation of non-axisymmetric oscillations of rapidl
Externí odkaz:
http://arxiv.org/abs/2110.00393
Publikováno v:
Phys. Rev. D 104, 023005 (2021)
We present a novel universal relation for binary neutron star mergers with long-lived neutron star remnants: inspired by recent work based on numerical relativity simulations, we propose a novel approach using perturbative calculations that allow us
Externí odkaz:
http://arxiv.org/abs/2106.08023
In this work we provide a framework that connects the co-rotating and counter rotating $f$-mode frequencies of rotating neutron stars with their stellar structure. The accurate computation of these modes for realistic equations of state has been pres
Externí odkaz:
http://arxiv.org/abs/2103.07266
Publikováno v:
Phys. Rev. D 103, 124034 (2021)
Scalar-tensor theories are well studied extensions of general relativity that offer deviations which are yet within observational boundaries. We present the time evolution equations governing the perturbations of a nonrotating scalarized neutron star
Externí odkaz:
http://arxiv.org/abs/2102.11698
In the present paper we study the onset of the spin-induced scalarization of a Kerr black hole in scalar-Gauss-Bonnet gravity with a massive scalar field. Our approach is based on a (2+1) time evolution of the relevant linearized scalar field perturb
Externí odkaz:
http://arxiv.org/abs/2009.03774
Publikováno v:
Phys. Rev. D 102, 104027 (2020)
The scalarization is a very interesting phenomena allowing to endow a compact object with scalar hair while leaving all the predictions in the weak field limit unaltered. In Gauss-Bonnet gravity the source of the scalar field can be the curvature of
Externí odkaz:
http://arxiv.org/abs/2008.07391