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Observations of magnetars and some of the high magnetic field pulsars have shown that their thermal luminosity is systematically higher than that of classical radio-pulsars, thus confirming the idea that magnetic fields are involved in…

太阳与恒星天体物理 · 物理学 2015-06-16 Daniele Viganò , Nanda Rea , Jose A. Pons , Rosalba Perna , Deborah N. Aguilera , Juan A. Miralles

We present fully GRMHD simulations of the merger of binary neutron star (BNS) systems. We consider BNSs producing a hypermassive neutron star (HMNS) that collapses to a spinning black hole (BH) surrounded by a magnetized accretion disk in a…

高能天体物理现象 · 物理学 2016-10-31 Takumu Kawamura , Bruno Giacomazzo , Wolfgang Kastaun , Riccardo Ciolfi , Andrea Endrizzi , Luca Baiotti , Rosalba Perna

The measurement of the period and period derivative, and the canonical model of dipole radiation have provided a method to estimate the low superficial magnetic fields in the so-called Central Compact Objects (CCOs). In the present work, a…

高能天体物理现象 · 物理学 2018-11-14 N. Fraija , C. G. Bernal , G. Morales , R. Negreiros

The recent emergence of a new class of accretion-powered, transient, millisecond X-ray pulsars presents some difficulties for the conventional picture of accretion onto rapidly rotating magnetized neutron stars and their spin behavior…

天体物理学 · 物理学 2009-11-10 S. A. Rappaport , J. M. Fregeau , H. Spruit

Observational and theoretical work has now established that the fossil fields of magnetic massive stars are surviving remnants from an earlier event, or an earlier evolutionary phase. However, many important questions remain regarding the…

太阳与恒星天体物理 · 物理学 2020-01-30 Pınar Cerrahoğlu , Véronique Petit , Zsolt Keszthelyi , Alexandre David-Uraz

Self-consistent, multidimensional core-collapse supernova (SN) simulations, especially in 3D, have achieved tremendous progress over the past 10 years. They are now able to follow the entire evolution from core collapse through bounce,…

高能天体物理现象 · 物理学 2026-02-13 H. -Thomas Janka

Study of observed spin evolution of long-period X-ray pulsars challenges quasi-spherical and Keplerian disk accretion scenarios. It suggests that the magnetospheric radius of the neutron stars is substantially smaller than Alfven radius and…

高能天体物理现象 · 物理学 2015-06-18 Nazar Ikhsanov , Nina Beskrovnaya , Yury Likh

The precise measurement of neutron star (NS) spins can provide important insight into the formation and evolution of compact binaries containing NS. While traditional methods of NS spin measurement rely on pulsar observations, gravitational…

高能天体物理现象 · 物理学 2024-08-01 Ish Gupta

Extreme stripped-envelope supernovae (SESNe), including Type Ic superluminous supernovae (SLSNe-I), broad-line Type Ic SNe (SNe Ic-BL), and fast blue optical transients (FBOTs), are widely believed to harbor a newborn fast-spinning…

高能天体物理现象 · 物理学 2024-10-28 Rui-Chong Hu , Jin-Ping Zhu , Ying Qin , Yong Shao , Bing Zhang , Yun-Wei Yu , En-Wei Liang , Liang-Duan Liu , Bo Wang , Xin-Wen Shu , Jian-Feng Liu

The isolated binary evolution model for merging neutron stars (NSs) involves processes such as mass transfer, common-envelope evolution, and natal kicks, all of which are poorly understood. Also, the predicted NS-NS merger rates are…

高能天体物理现象 · 物理学 2019-09-25 Adrian S. Hamers , Todd A. Thompson

We discuss the spin evolution of pulsars in the case where a superfluid component of the star is coupled to the observable crust on long, spindown timescales. The momentum transfer from the superfluid interior results in an apparent decay…

天体物理学 · 物理学 2011-02-11 Armen Sedrakian , James M. Cordes

We present numerical simulations of binary neutron star mergers, comparing irrotational binaries to binaries of NSs rotating aligned to the orbital angular momentum. For the first time, we study spinning BNSs employing nuclear physics…

广义相对论与量子宇宙学 · 物理学 2015-04-10 Wolfgang Kastaun , Filippo Galeazzi

The prediction of the spins of the compact remnants is a fundamental goal of the theory of stellar evolution. Here, we confront the predictions for white dwarf spins from evolutionary models including rotation with observational…

天体物理学 · 物理学 2009-11-13 M. P. L. Suijs , N. Langer , A. -J. Poelarends , S. -C. Yoon , A. Heger , F. Herwig

In this work, we study the effects of magnetic fields and rotation on the structure and composition of proto-neutron stars (PNS's). A hadronic chiral SU(3) model is applied to cold neutron stars (NS) and proto-neutron stars with trapped…

高能天体物理现象 · 物理学 2016-08-17 B. Franzon , V. Dexheimer , S. Schramm

We explore fallback accretion onto newly born magnetars during the supernova of massive stars. Strong magnetic fields (~10^{15} G) and short spin periods (~1-10 ms) have an important influence on how the magnetar interacts with the…

高能天体物理现象 · 物理学 2015-05-27 Anthony L. Piro , Christian D. Ott

We discuss three topics related to the neutron star (NS) mass spectrum. At first we discuss the possibility to form low-mass ($ M \stackrel{<}{\sim} 1 M_{\odot}$) and suggest this is possible only due to fragmentation of rapidly rotating…

天体物理学 · 物理学 2008-11-26 S. B. Popov , D. Blaschke , H. Grigorian , M. E. Prokhorov

Massive stars (M> 10Msun) end their lives with spectacular explosions due to gravitational collapse. The collapse turns the stars into compact objects such as neutron stars and black holes with the ejection of cosmic rays and heavy…

高能天体物理现象 · 物理学 2015-06-12 K. Sumiyoshi

Magnetohydrodynamic simulations of core-collapse supernovae have become increasingly mature and important in recent years. Magnetic fields take center stage in scenarios for explaining hypernova explosions, but are now also considered in…

高能天体物理现象 · 物理学 2024-03-29 Bernhard Müller

The evolution of inclination angle and precession damping of radio pulsars is considered. It is assumed that the neutron star consists of 3 "freely" rotating components: the crust and two core components, one of which contains pinned…

高能天体物理现象 · 物理学 2017-08-25 K. Y. Kraav , M. V. Vorontsov , D. P. Barsukov

We present a systematic numerical-relativity study of the dynamical ejecta, winds and nucleosynthesis in neutron star merger remnants. Binaries with the chirp mass compatible with GW170817, different mass ratios, and five microphysical…

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