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We investigate by means of numerical simulations the possibilities of tomographic techniques applied to a Bose-Einstein condensate in order to reconstruct its ground state. Essentially, two scenarios are considered for which the density…

Quantum Physics · Physics 2009-11-07 Stefano Mancini , Mauro Fortunato , Paolo Tombesi , G. Mauro D'Ariano

The equation of state calculated by Saumon and collaborators has been adopted in most core-accretion simulations of giant-planet formation performed to date. Since some minor errors have been found in their original paper, we present…

Earth and Planetary Astrophysics · Physics 2015-05-13 A. Fortier , O. G. Benvenuto , A. Brunini

We study the oscillations of relativistic stars, incorporating key physics associated with internal composition, thermal gradients and crust elasticity. Our aim is to develop a formalism which is able to account for the state-of-the-art…

General Relativity and Quantum Cosmology · Physics 2015-09-16 C. J. Krüger , W. C. G. Ho , N. Andersson

Relating different global neutron-star (NS) properties, such as tidal deformability and radius, or mass and radius, requires an equation of state (EoS). Determining the NS EoS is therefore not only the science goal of a variety of…

High Energy Astrophysical Phenomena · Physics 2024-06-27 P. J. Davis , H. Dinh Thi , A. F. Fantina , F. Gulminelli , M. Oertel , L. Suleiman

Adding an independent estimate of the mean stellar density, $\rho_{\star}$, as a constraint in the analysis of stars that host transiting exoplanets can significantly improve the precision of the planet radius estimate in cases where the…

Solar and Stellar Astrophysics · Physics 2025-09-25 P. F. L. Maxted

We investigate the possible sequels, for the hybrid compact stars consisting of nucleons, hyperons and three flavour color-flavor-locked quarks phase under global neutrality and chemical equilibrium conditions. The hadron equations of state…

Nuclear Theory · Physics 2019-09-18 Suman Thakur , Shashi K Dhiman

Deformed dispersion relations are considered in the study of equations of state of Fermi gas with applications to compact objects. Different choices of deformed energy relations are used in the formulation of our model. As a first test, we…

General Physics · Physics 2021-10-27 Luis C. N. Santos , Clésio E. Mota , Franciele M. da Silva , Guilherme Grams , I. P. Lobo

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…

General Relativity and Quantum Cosmology · Physics 2023-04-17 Hao-Jui Kuan , Christian J. Krüger , Arthur G. Suvorov , Kostas D. Kokkotas

In the quest for describing massive neutron stars with radii compatible with recent expectations, we take a different approach in the present paper and, instead of tuning the equations of state, we use an appropriate parameterization of the…

Nuclear Theory · Physics 2019-02-27 Clésio E. Mota , Guilherme Grams , Débora P. Menezes

The aim of this work is the study of hybrid stars interiors from the equations of state describing the matter composing them. We used modern hadronic equations of state to describe the matter in the outer core of these stars. The quark…

Motivated by a recent astrophysical measurement of the pressure of cold matter above nuclear-matter saturation density, we compute the equation of state of neutron star matter using accurately calibrated relativistic models. The uniform…

Nuclear Theory · Physics 2014-11-20 F. J. Fattoyev , J. Piekarewicz

Phenomenological calculations of the properties of dense matter, such as relativistic mean-field theories, represent a pathway to predicting the microscopic and macroscopic properties of neutron stars. However, such theories do not…

Nuclear Theory · Physics 2025-11-03 Isaac Legred , Liam Brodie , Alexander Haber , Reed Essick , Katerina Chatziioannou

Generalized $f$-coherent state approach in deformation quantization framework is investigated by using a $\ast $-eigenvalue equation. For this purpose we introduce a new Moyal star product called $f$-star product, so that by using this…

Mathematical Physics · Physics 2013-02-14 R. Roknizadeh , S. A. A. Ghorashi , H. Heydari

Pure entangled states of two spatial qudits have been produced by using the momentum transverse correlation of the parametric down-converted photons [Phys. Rev. Lett. \textbf{94} 100501]. Here we show a generalization of this process to…

Quantum Physics · Physics 2009-11-13 G. Lima , F. A. Torres-Ruiz , L. Neves , A. Delgado , C. Saavedra , S. Pádua

We investigate the formation of planetesimals via the gravitational instability of solids that have settled to the midplane of a circumstellar disk. Vertical shear between the gas and a subdisk of solids induces turbulent mixing which…

Astrophysics · Physics 2008-11-26 Andrew N. Youdin , Frank H. Shu

We consider the dynamics of rotationally supported thin galactic disc composed of stars and gas under the influence of external tidal field and derive the coupled differential equations governing the evolution of instabilities. Further…

Astrophysics of Galaxies · Physics 2019-05-28 K. Aditya

A simple method for determining the thermal component of the EOS of solids under high pressure is proposed.Application to the interior of the Earth gives results in agreement with recent geophysical data.

Astrophysics · Physics 2009-10-31 V. Celebonovic

This paper constructs a theoretical framework for calculating the distribution of masses for secondary bodies forming via gravitational instability in the outer regions of circumstellar disks. We show that several alternate ways to specify…

Earth and Planetary Astrophysics · Physics 2025-08-13 Fred C. Adams , Aster G. Taylor , Michael R. Meyer

Relativistic temperature of gas raises the issue of the equation of state (EoS) in relativistic hydrodynamics. We study the EoS for numerical relativistic hydrodynamics, and propose a new EoS that is simple and yet approximates very closely…

Astrophysics · Physics 2009-11-11 Dongsu Ryu , Indranil Chattopadhyay , Eunwoo Choi

We study relativistic stars in the scale-dependent scenario, which is one of the approaches to quantum gravity, and where Newton's constant is promoted to a scale-dependent quantity. First, the generalized structure equations are derived…

General Relativity and Quantum Cosmology · Physics 2020-05-12 Grigoris Panotopoulos , Ángel Rincón , Ilídio Lopes