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相关论文: Phase Diagram for Spinning and Accreting Neutron S…

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We study the evolution of the rotation frequency for accreting compact stars. The discontinuous change of the moment of inertia of a rapidly rotating star due to the possible quark core appearance entails a characteristic change in the spin…

天体物理学 · 物理学 2010-11-19 G. Poghosyan , H. Grigorian , D. Blaschke

For the classification of rotating compact stars with two high density phases a phase diagram in the angular velocity (Omega) - baryon number (N) plane is investigated. The dividing line N_crit(Omega) between configurations with one and two…

天体物理学 · 物理学 2007-05-23 D. Blaschke , H. Grigorian , G. Poghosyan

A neutron star in binary orbit with a low-mass non-degenerate companion becomes a source of x-rays with millisecond variability when mass accretion spins it up. Centrifugally driven changes in density profile may initiate a phase transition…

天体物理学 · 物理学 2009-11-06 Norman K. Glendenning , F. Weber

Using the formalism of general relativity for axially symmetric gravitational fields and their sources - rotating compact stars - a perturbation theory with respect to angular velocity is developed and physical quantities such as mass,…

天体物理学 · 物理学 2010-11-19 E. Chubarian , H. Grigorian , G. Poghosyan , D. Blaschke

The back-bending phenomenon for compact stars is studied by means of analytical equations of state, for both constant-pressure phase transitions and the transitions through the mixed-phase region. We restrict ourselves to the case of normal…

天体物理学 · 物理学 2007-05-23 J. L. Zdunik , M. Bejger , P. Haensel , E. Gourgoulhon

The evolution of neutron stars in close binary systems with a low-mass companion is considered assuming the magnetic field to be confined within the solid crust. We adopt the standard scenario of the evolution in a close binary system in…

天体物理学 · 物理学 2009-10-30 V. Urpin , U. Geppert , D. Konenkov

In this paper we review the most common descriptions for the first order phase transition to deconfined quark matter in the core of neutron stars. We also present a new description of these phase transitions in the core of proto-neutron…

高能天体物理现象 · 物理学 2019-01-24 V. Dexheimer , L. T. T. Soethe , J. Roark , R. O. Gomes , S. O. Kepler , S. Schramm

It is well known that neutron stars spin down due to magnetic dipole radiation. The deconfinement phase transition of hadron matter to quark matter is expected to occur in the dense cores of the stars during spin-down. The phase transition…

高能天体物理现象 · 物理学 2010-06-02 Miao Kang

As rotating neutron stars slow down, the pressure and the density in the core region increase due to the decreasing centrifugal forces and phase transitions may occur in the center. We extract the analytic behavior near the critical angular…

天体物理学 · 物理学 2008-11-26 H. Heiselberg , M. Hjorth-Jensen

We have found correlations between properties of the equation of state for stellar matter with a phase transition at supernuclear densities and two characteristic features of a "phase diagram" for rotating compact stars in the angular…

核理论 · 物理学 2009-11-07 H. Grigorian , D. Blaschke , G. Poghosyan

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…

高能天体物理现象 · 物理学 2017-09-22 Biswajit Paul

We investigate the evolution of the magnetic field of isolated pulsars and of neutron stars in different kinds of binary systems, assuming the field to be originally confined to the crust. Our results for the field evolution in isolated…

天体物理学 · 物理学 2009-10-30 Sushan Konar , Dipankar Bhattacharya

As neutron stars spin-down and contract, the deconfinement phase transition can continue to occur, resulting in energy release(so-called deconfinement heating) in case of the first-order phase transition. The thermal evolution of neutron…

太阳与恒星天体物理 · 物理学 2010-04-30 Kang Miao , Wang Xiao-dong , Zheng Xiao-ping

The deconfinement phase transition which happens in the interior of neutron stars are investigated. Coupled with the spin evolution of the stars, the effect of entropy production and deconfinement heat generation during the deconfinement…

高能天体物理现象 · 物理学 2016-11-25 Xia Zhou , Xiao-Ping Zheng

Theoretically, the phase transition between the confined and deconfined phases of quarks can have a remarkable effect on the spin properties of millisecond pulsars and on the spin distribution of the population of x-ray neutron stars in…

天体物理学 · 物理学 2007-05-23 Norman K. Glendenning , Fridolin Weber

The deconfinement phase transition will lead to the release of latent heat during spins down of neutron stars if the transition is the first-order one.We have investigated the thermal evolution of neutron stars undergoing such deconfinement…

天体物理学 · 物理学 2008-11-26 Miao Kang , Nana Pan , Xiaodong Wang

The evolutionary scenario of the neutron star magnetic field is examined assuming a spindown-induced expulsion of magnetic flux originally confined to the core, in which case the expelled flux undergoes ohmic decay. The nature of field…

天体物理学 · 物理学 2009-10-31 Sushan Konar , Dipankar Bhattacharya

Thermal evolution of neutron stars is known to depend on the properties of superdense matter in neutron star cores. We suggest a statistical analysis of isolated cooling middle-aged neutron stars and old transiently accreting…

太阳与恒星天体物理 · 物理学 2015-07-16 M. V. Beznogov , D. G. Yakovlev

Gravitational, magnetic and superfluid forces can stress the crust of an evolving neutron star. Fracture of the crust under these stresses could affect the star's spin evolution and generate high-energy emission. We study the growth of…

天体物理学 · 物理学 2009-10-31 Lucia M. Franco , Bennett Link , Richard I. Epstein

The conversion of nuclear matter to quark matter in the core of a rotating neutron star alters its moment of inertia. Hence the epoch over which conversion takes place will be signaled in the spin-down "signal_prl.tex" 581 lines, 22203…

天体物理学 · 物理学 2009-10-30 Norman K. Glendenning , S. Pei , F. Weber
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