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We have collected the parameter of 38 neutron stars (NSs) in binary systems with spin periods and measured masses. By adopting the Boot-strap method, we reproduced the procedure of mass calculated for each system separately, to determine…

High Energy Astrophysical Phenomena · Physics 2013-03-28 Z. Cheng , A. Taani , Y. H. Zhao

A novel concept has been recently proposed for explaining the temporal coincidence of some Gamma Ray Bursts (GRBs) with an associated Supernova (SN) in terms of the gravitational collapse of a neutron star (NS) to a Black Hole (BH), induced…

High Energy Astrophysical Phenomena · Physics 2014-03-28 L. Izzo , Jorge A. Rueda , R. Ruffini

We perform three dimensional smoothed particle hydrodynamics (SPH) simulations of gas accretion onto the seeds of binary stars to investigate their short-term evolution. Our simulation setup is more realistic compared to the previous works…

Solar and Stellar Astrophysics · Physics 2016-12-14 Tatsuya Satsuka , Toru Tsuribe , Suguru Tanaka , Kentaro Nagamine

In the classical picture, electron-capture supernovae and the accretion-induced collapse of oxygen-neon white dwarfs (ONeWDs) undergo an oxygen deflagration phase before gravitational collapse produces a neutron star (NS). These types of…

Solar and Stellar Astrophysics · Physics 2016-09-28 Samuel Jones , Friedrich K. Roepke , Ruediger Pakmor , Ivo R. Seitenzahl , Sebastian T. Ohlmann , Philipp V. F. Edelmann

We consider the possible existence of a common channel of evolution of binary systems, which results in a gamma-ray burst during the formation of a black hole or the birth of a magnetar during the formation of a neutron star. We assume that…

High Energy Astrophysical Phenomena · Physics 2010-11-02 A. I. Bogomazov , S. B. Popov

We conduct simulations using MESA of the reverse formation of a white dwarf (WD)-neutron star (NS) binary system in which the WD forms before the NS. We conclude that a core collapse supernova (CCSN) explosion might occur inside a planetary…

Solar and Stellar Astrophysics · Physics 2020-11-18 Ealeal Bear , Noam Soker

We find that the orbital period (2.4 hours), eccentricity (0.09), dipole magnetic field strength (6.9 x 10^9 Gauss) and spin period (22 ms) of the new highly relativistic double neutron star system PSR J0737-3039 can all be consistently…

Astrophysics · Physics 2009-11-10 J. D. M. Dewi , E. P. J. van den Heuvel

In this work, we investigate an alternative channel for the formation of fast-spinning black hole-neutron star (BHNS) binaries, in which super-Eddington accretion is expected to occur in accreting BHs during the stable mass transfer phase…

High Energy Astrophysical Phenomena · Physics 2024-02-26 Zhen-Han-Tao Wang , Rui-Chong Hu , Ying Qin , Jin-Ping Zhu , Bing Zhang , Shuang-Xi Yi , Qin-Wen Tang , Xin-Wen Shu , Fen Lyu , En-Wei Liang

Hydrodynamic simulations of the merger of stellar mass black hole - neutron star binaries (BH/NS) are compared with mergers of binary neutron stars (NS/NS). The simulations are Newtonian, but take into account the emission and backreaction…

Astrophysics · Physics 2009-10-31 H. -Th. Janka , Th. Eberl , M. Ruffert , C. L. Fryer

In this paper we study the effects of rotation on the frequencies of the quasi-normal modes of a proto-neutron star (PNS) born in a gravitational collapse during the first minute of life. Our analysis starts a few tenths of seconds after…

Astrophysics · Physics 2009-11-10 V. Ferrari , L. Gualtieri , J. A. Pons , A. Stavridis

We present the first three-dimensional (3D) smoothed-particle-hydrodynamics (SPH) simulations of the induced gravitational collapse (IGC) scenario of long-duration gamma-ray bursts (GRBs) associated with supernovae (SNe). We simulate the SN…

High Energy Astrophysical Phenomena · Physics 2019-01-30 L. Becerra , C. L. Ellinger , C. L. Fryer , J. A. Rueda , R. Ruffini

We consider the effect of a supernova (SN) explosion in a very massive binary that is expected to form in a portion of Population III stars with the mass higher than 100$M_\odot$. In a Population III binary system, a more massive star can…

Astrophysics · Physics 2009-11-13 Jun'ichi Sato , Masayuki Umemura , Keisuke Sawada

The detection of binary neutron star mergers represents one of the most important and complex astrophysical discoveries of the recent years. One of the unclear aspects of the problem is the turbulent magnetic field amplification, initially…

General Relativity and Quantum Cosmology · Physics 2020-11-11 Ricard Aguilera-Miret , Daniele Viganò , Federico Carrasco , Borja Miñano , Carlos Palenzuela

An accreting massive black hole (MBH) in a galactic nucleus is surrounded by a dense stellar cluster. We analyze and simulate numerically the evolution of a thin accretion disk due to its internal viscous torques, due to the frame-dragging…

Astrophysics of Galaxies · Physics 2015-05-30 Michal Bregman , Tal Alexander

(abridged) Three-dimensional hydrodynamic simulations with an Eulerian PPM code are presented for the time-dependent evolution of accretion tori around nonrotating and rotating stellar-mass black holes (BHs), using a pseudo-Newtonian…

Astrophysics · Physics 2009-11-11 S. Setiawan , M. Ruffert , H. -Th. Janka

It has been estimated that a significant proportion of binary neutron star merger events produce long-lived massive remnants supported by differential rotation and subject to rotational instabilities. To examine formation and oscillation of…

General Relativity and Quantum Cosmology · Physics 2018-10-08 Xuefeng Zhang , Zhoujian Cao

The explosion of ultra-stripped stars in close binaries can lead to ejecta masses < 0.1 M_sun and may explain some of the recent discoveries of weak and fast optical transients. In Tauris et al. (2013), it was demonstrated that helium star…

Solar and Stellar Astrophysics · Physics 2015-06-10 Thomas M. Tauris , Norbert Langer , Philipp Podsiadlowski

We study the four double neutron star systems found in the Galactic disk in terms of the orbital characteristics of their immediate progenitors and the natal kicks imparted to neutron stars. Analysis of the effect of the second supernova…

Astrophysics · Physics 2009-10-30 Chris Fryer , Vassiliki Kalogera

Neutron stars in X-ray binary systems are fascinating objects that display a wide range of timing and spectral phenomena in the X-rays. Not only parameters of the neutron stars, like magnetic field strength and spin period evolve in their…

High Energy Astrophysical Phenomena · Physics 2017-09-22 Biswajit Paul

In a previous paper [M. E. Gusakov, A. I. Chugunov, and E. M. Kantor, Phys. Rev. Lett. 112, 151101 (2014)], we introduced a new scenario that explains the existence of rapidly rotating warm neutron stars (NSs) observed in low-mass X-ray…

Solar and Stellar Astrophysics · Physics 2015-06-16 Mikhail E. Gusakov , Andrey I. Chugunov , Elena M. Kantor