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Microscopic calculations of neutron matter based on nuclear interactions derived from chiral effective field theory, combined with the recent observation of a 1.97 +- 0.04 M_sun neutron star, constrain the equation of state of neutron-rich…

Solar and Stellar Astrophysics · Physics 2013-07-23 K. Hebeler , J. M. Lattimer , C. J. Pethick , A. Schwenk

We study positive bound states for the semiclassical stationary nonlinear Schr\"odinger equation. We are especially interested in solutions which concentrate on a lower dimensional sphere. We adopt a purely variational approach which allows…

Analysis of PDEs · Mathematics 2011-11-08 Denis Bonheure , Jonathan Di Cosmo , Jean Van Schaftingen

We consider the Schr\"odinger equation with singular position dependent effective mass and prove that it is very weakly well posed. A uniqueness result is proved in an appropriate sense, moreover, we prove the consistency with the classical…

Analysis of PDEs · Mathematics 2023-02-22 Michael Ruzhansky , Mohammed Elamine Sebih , Niyaz Tokmagambetov

We review current state of neutron star cooling theory and discuss the prospects to constrain the equation of state, neutrino emission and superfluid properties of neutron star cores by comparing the cooling theory with observations of…

Astrophysics · Physics 2008-11-26 D. G. Yakovlev , O. Y. Gnedin , A. D. Kaminker , A. Y. Potekhin

Neutron stars are versatile in their application to studying various important aspects of fundamental physics, in particular strong-field gravity tests and the equation of state for super-dense nuclear matter at low temperatures. However,…

General Relativity and Quantum Cosmology · Physics 2022-10-18 Lijing Shao , Kent Yagi

Thermalization of systems described by the discrete non-linear Schr\"odinger equation, in the strong disorder limit, is investigated both theoretically and numerically. We show that introducing correlations in the disorder potential, while…

Disordered Systems and Neural Networks · Physics 2011-07-07 Tsampikos Kottos , Boris Shapiro

Neutron stars are the densest objects known in our visible universe. Properties of matter inside a neutron star are encoded in its equation of state, which has wide-ranging uncertainty from a theoretical perspective. With the current…

High Energy Astrophysical Phenomena · Physics 2022-04-20 Bhaskar Biswas

Various statistical issues relevant to searches for new physics or to parameter determination in analyses of data in neutrino experiments are briefly discussed.

High Energy Physics - Experiment · Physics 2016-07-14 Louis Lyons

We implement a semi-analytic approach for stability analysis, addressing the ongoing uncertainty about stability and structure of neutron star magnetic fields. Applying the energy variational principle, a model system is displaced from its…

Solar and Stellar Astrophysics · Physics 2017-09-25 Marlene Herbrik , Kostas Kokkotas

A set of microscopic, covariant density-functional, and non-relativistic Skyrme-type equations of state is employed to study the structure of purely nucleonic neutron stars at finite temperature. After examining the agreement with presently…

Nuclear Theory · Physics 2022-01-05 Jin-Biao Wei , G. F. Burgio , Ad. R. Raduta , H. -J. Schulze

Properties of protoneutron stars are discussed in the context of kaon condensation. Thermal and neutrino trapping effects are very important ingredients to study them. By solving the TOV equation, we discuss the static properties of…

Nuclear Theory · Physics 2009-11-06 Masatomi Yasuhira , Toshitaka Tatsumi

The equation of state and the properties of neutron stars are studied for a phase transition to a charged kaon condensate. We study the mixed phase by using Gibbs condition with comparison to the hitherto applied Maxwell construction.…

Nuclear Theory · Physics 2007-05-23 Juergen Schaffner-Bielich , Norman K. Glendenning

The possibility to determine the axial strange form factor of the nucleon from neutrino scattering experiments is studied. The existing experimental information is reviewed and several related observables which could be measured in the near…

High Energy Physics - Phenomenology · Physics 2007-05-23 W. M. Alberico , C. Maieron

The solution of the time-dependent Schr\"odinger equation is discussed for a particle confined in half-space $x>0$ with a linear potential $V(x)=Kx$ in the following situations: (a) sudden removal of the wall and switching on the linear…

Quantum Physics · Physics 2011-12-30 S. V. Mousavi

The renormalization of the Schr"odinger equation with regular One Boson Exchange and singular chiral potentials including One and Two-Pion exchanges is analyzed within the context of NN scattering.

Nuclear Theory · Physics 2008-11-26 E. Ruiz Arriola , A. Calle Cordon , M. Pavon Valderrama

Calculating the structure of white dwarf and neutron stars would be a suitable topic for an undergraduate thesis or an advanced special topics or independent study course. The subject is rich in many different areas of physics accessible to…

Nuclear Theory · Physics 2009-11-10 Richard R. Silbar , Sanjay Reddy

We discuss different exotic phases and components of matter from the crust to the core of neutron stars based on theoretical models for equations of state relevant to core collapse supernova simulations and neutron star merger. Parameters…

High Energy Astrophysical Phenomena · Physics 2017-09-27 Debades Bandyopadhyay

The increasing number and precision of measurements of neutron star masses, radii, and, in the near future, moments of inertia offer the possibility of precisely determining the neutron star equation of state. One way to facilitate the…

High Energy Astrophysical Phenomena · Physics 2016-12-14 Carolyn A. Raithel , Feryal Özel , Dimitrios Psaltis

I discuss why state-of-the art perturbative QCD calculations of the equation of state at large chemical potential that are reliable at asymptotically high densities constrain the same equation of state at neutron-star densities. I describe…

Nuclear Theory · Physics 2022-08-08 Oleg Komoltsev

The physics of compact objects is one of the very actively developing branches of theoretical investigations, since the careful analysis of different models for the internal structure of these objects, their evolutionary characteristics and…

Astrophysics · Physics 2007-05-23 Hovik Grigorian
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