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The crystallization of electrons in quasi low-dimensional solids is studied in a model which retains the full three-dimensional nature of the Coulomb interactions. We show that restricting the electron motion to layers (or chains) gives…

强关联电子 · 物理学 2009-11-11 G. Rastelli , P. Quemerais , S. Fratini

The behaviour of a strongly-magnetized collisional electron-positron plasma which is optically thin to cyclotron radiation is considered, and the distribution functions accessible to it on the various timescales in the system are…

等离子体物理 · 物理学 2021-02-17 Daniel Kennedy , Per Helander

Nonuniform neutron-rich matter present in both core-collapse supernovae and neutron-star crusts is described in terms of a semiclassical model that reproduces nuclear-matter properties and includes long-range Coulomb interactions. The…

天体物理学 · 物理学 2009-11-10 C. J. Horowitz , M. A. Perez-Garcia , J. Carriere , D. K. Berry , J. Piekarewicz

We study the properties of neutron-star crust within a Bayesian framework based on a unified relativistic mean-field (RMF) description of dense matter. The analysis focuses on the posterior distributions of crust properties, constrained by…

核理论 · 物理学 2026-01-13 Vishal Parmar , Ignazio Bombaci

Shear modulus of solid neutron star crust is calculated by thermodynamic perturbation theory taking into account ion motion. At given density the crust is modelled as a body-centered cubic Coulomb crystal of fully ionized atomic nuclei of…

太阳与恒星天体物理 · 物理学 2015-05-27 D. A. Baiko

Formation and decay of rod-like and slab-like nuclei, as may be encountered in the outer parts of neutron stars, are examined within a zero-temperature stability analysis with respect to perturbations inducing fission and proton clustering.…

核理论 · 物理学 2009-11-07 Kei Iida , Gentaro Watanabe , Katsuhiko Sato

We present microscopic Molecular Dynamics simulations including the efficient Ewald sum procedure to study warm and dense stellar plasmas consisting of finite-size ion charges immerse in a relativistic neutralizing electron gas. For…

高能天体物理现象 · 物理学 2024-02-19 D. Barba-González , C. Albertus , M. Ángeles Pérez-García

We investigate nuclear pasta structures at high temperatures in the framework of relativistic mean field model with Thomas-Fermi approximation. Typical pasta structures (droplet, rod, slab, tube, and bubble) are obtained, which form various…

核理论 · 物理学 2022-09-28 Cheng-Jun Xia , Toshiki Maruyama , Nobutoshi Yasutake , Toshitaka Tatsumi

The synthesis of hyper-heavy elements is investigated under conditions simulating neutron star environment. The Constrained Molecular Dynamics (CoMD) approach is used to simulate low energy collisions of extremely n-rich nuclei. A new type…

核理论 · 物理学 2022-07-27 M. Veselsky , V. Petousis , Ch. C. Moustakidis , G. A. Souliotis , A. Bonasera

Macroscopic plasma polarization, which is created by gravitation and other mass-acting (inertial) forces in massive astrophysical objects is under discussion. Non-ideality effect due to strong Coulomb interaction of charged particles is…

太阳与恒星天体物理 · 物理学 2015-05-19 Igor Iosilevskiy

The features of electron assisted neutron exchange processes in crystalline solids are survayed. It is stated that, contrary to expectations, the cross section of these processes may reach an observable magnitude even in the very low energy…

综合物理 · 物理学 2017-01-25 Péter Kálmán , Tamás Keszthelyi

We study the linear response of the inner crust of neutron stars within the Random Phase Approximation, employing a Skyrme-type interaction as effective interaction. We adopt the Wigner-Seitz approximation, and consider a single unit cell…

核理论 · 物理学 2015-03-13 S. Baroni , A. Pastore , F. Raimondi , F. Barranco , R. A. Broglia , E. Vigezzi

Background: Nuclear pasta, emerging due to the competition between the long-range Coulomb force and the short-range strong force, is believed to be present in astrophysical scenarios, such as neutron stars and core-collapse supernovae. Its…

核理论 · 物理学 2019-11-06 B. Schuetrumpf , G. Martínez-Pinedo , Md Afibuzzaman , H. M. Aktulga

Pulsar-like compact stars usually have strong magnetic fields, with the strength from $\sim 10^8$ to $\sim 10^{12}$ Gauss on surface. How such strong magnetic fields can be generated and maintained is still an unsolved problem, which is, in…

太阳与恒星天体物理 · 物理学 2016-05-25 X. Y. Lai , R. X. Xu

The effects of the existence of exotic nuclear shapes at the bottom of the neutron star inner crust - nuclear `pasta' - on observational phenomena are estimated by comparing the limiting cases that those phases have a vanishing shear…

太阳与恒星天体物理 · 物理学 2015-05-28 M. Gearheart , W. G. Newton , J. Hooker , Bao-An Li

The equation of state of the neutron-star outer crust is sensitive to nuclear mass predictions and provides a direct connection to properties of nuclei throughout the nuclide map, including those beyond experimental reach. We quantify the…

核理论 · 物理学 2026-05-12 P. S. Koliogiannis , N. Paar

We define `astromaterial science' as the study of materials in astronomical objects that are qualitatively denser than materials on earth. Astromaterials can have unique properties related to their large density, though they may be…

高能天体物理现象 · 物理学 2017-10-25 M. E. Caplan , C. J. Horowitz

A novel equation of state used for analysis of the heavy ion collision experimental data is generalized to also describe the matter inside neutron stars. This approach differs from others by including an induced surface tension caused by…

高能天体物理现象 · 物理学 2019-02-20 V. Sagun , I. Lopes , A. Ivanytskyi

We investigate crystal nucleation in supersaturated colloid suspensions using enhanced molecular dynamics simulations augmented with machine learning techniques. The simulations reveal that crystallization in the model colloidal system…

软凝聚态物质 · 物理学 2024-04-30 Vanessa J. Meraz , Ziyue Zou , Pratyush Tiwary

To make best use of multi-faceted astronomical and nuclear data-sets, probability distributions of neutron star models that can be used to propagate errors consistently from one domain to another are required. We take steps toward a…

高能天体物理现象 · 物理学 2021-09-22 Lauren Balliet , William Newton , Sarah Cantu , Srdan Budimir