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A convincing explanation for the observed pulsar large peculiar velocities is still missing. We argue that any viable particle physics solution would most likely involve the resonant production of a non-interacting neutrino $\nu_s$ of mass…

天体物理学 · 物理学 2009-10-31 Enrico Nardi , Jorge I. Zuluaga

Three-dimensional (3D), time dependent numerical simulations, of flow of matter in stars, now have sufficient resolution to be fully turbulent. The late stages of the evolution of massive stars, leading up to core collapse to a neutron star…

太阳与恒星天体物理 · 物理学 2014-01-30 W. David Arnett , Casey Meakin , Maxime Viallet

The standing wave nodes of nonradial oscillations on a neutron star crust will drift with a definite angle velocity around rotational pole due to the rotation of neutron stars. This is called the nonradial oscillation node precession of…

天体物理学 · 物理学 2007-05-23 Haochen Li

A phase transition in the nature of matter in the core of a neutron star, such as quark deconfinement or Bose condensation, can cause the spontaneous spin-up of a solitary millisecond pulsar. The spin-up epoch for our model lasts for…

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

The interiors of mature neutron stars are expected to be superfluid. Superfluidity of matter on the microscopic scale can have a number of large scale, potentially observable consequences, as the superfluid component of the star can now…

高能天体物理现象 · 物理学 2019-12-11 Vadym Khomenko , Marco Antonelli , Brynmor Haskell

Based on the expected population of core collapse supernova remnants and the huge number of detected pulsars in the Galaxy, still representing only a fraction of the real population, pulsar wind nebulae are likely to constitute one of the…

高能天体物理现象 · 物理学 2023-09-06 Barbara Olmi

We produce synthetic populations of pulsars within our Galaxy and calculate the resulting scale heights as well as the radial and space velocity distributions of the pulsars. Results are presented for isolated pulsars, binary pulsars and…

星系天体物理 · 物理学 2009-11-13 Paul Kiel , Jarrod Hurley

Several relatively bright, persistent X-ray sources display regular pulses, with periods in the range of 700-10000 s. These sources are identified with massive close binaries in which a neutron star accretes material onto its surface. The…

天体物理学 · 物理学 2008-11-26 N. R. Ikhsanov

Neutron stars are among the most fascinating astrophysical sources, being characterized by strong gravity, densities about the nuclear one or even above, and huge magnetic fields. Their observational signatures can be extremely diverse…

高能天体物理现象 · 物理学 2017-11-06 L. Del Zanna , A. G. Pili , B. Olmi , N. Bucciantini , E. Amato

Pulsars are rotating neutron stars that are renowned for their timing precision, although glitches can interrupt the regular timing behavior when these stars are young. Glitches are thought to be caused by interactions between normal and…

高能天体物理现象 · 物理学 2017-03-29 Wynn C. G. Ho , Cristobal M. Espinoza , Danai Antonopoulou , Nils Andersson

Discoveries of planet- and stellar remnant-hosting pulsars challenge our understanding as the violent supernova explosion that forms the pulsar presumably destabilizes the system. Type II supernova explosions lead to the formation of…

太阳与恒星天体物理 · 物理学 2022-12-28 Zsolt Regaly , Viktoria Frohlich , Jozsef Vinko

Advances in our understanding and the modeling of stellar core-collapse and supernova explosions over the past 15 years are reviewed, concentrating on the evolution of hydrodynamical simulations, the description of weak interactions and…

天体物理学 · 物理学 2008-11-26 H. -Th. Janka , K. Langanke , A. Marek , G. Martinez-Pinedo , B. Mueller

Pinning of superfluid vortices to magnetic flux tubes in the outer core of a neutron star supports a velocity difference of $\sim 10^5$ \cms\ between the neutron superfluid and the proton-electron fluid as the star spins down. Under the…

太阳与恒星天体物理 · 物理学 2015-06-03 Bennett Link

Shear-driven turbulence in the superfluid interior of a neutron star exerts a fluctuating torque on the rigid crust, causing the rotational phase to walk randomly. The phase fluctuation spectrum is calculated analytically for incompressible…

高能天体物理现象 · 物理学 2015-06-17 Andrew Melatos , Bennett Link

Runaway stars are stars observed to have large peculiar velocities. Two mechanisms are thought to contribute to the ejection of runaway stars, both involve binarity (or higher multiplicity). In the binary supernova scenario a runaway star…

太阳与恒星天体物理 · 物理学 2012-12-11 Hagai B. Perets , Ladislav Subr

Pulsars may either be spun up or down by hydrodynamic instabilities during the supernova explosion of massive stars. Besides rapidly-rotating cases related to bipolar explosions, stellar rotation may affect the explosion of massive stars in…

高能天体物理现象 · 物理学 2017-06-30 Rémi Kazeroni , Jérôme Guilet , Thierry Foglizzo

It is pointed out that a cavity supernova (SN) explosion of a moving massive star could result in a significant offset of the neutron star (NS) birth-place from the geometrical centre of the supernova remnant (SNR). Therefore: a) the high…

天体物理学 · 物理学 2016-08-30 V. V. Gvaramadze

Observations of pulsar glitches may provide insights on the internal physics of neutron stars and recent studies show how it is in principle possible to constrain pulsar masses with timing observations. The reliability of these estimates…

高能天体物理现象 · 物理学 2020-02-12 Alessandro Montoli , Marco Antonelli , Pierre Pizzochero

The origin of the Nuclear Star Cluster in the centre of our Galaxy is still unknown. One possibility is that it formed after the disruption of stellar clusters that spiralled into the Galactic Centre due to dynamical friction. We trace the…

星系天体物理 · 物理学 2017-11-20 F. Abbate , A. Mastrobuono-Battisti , M. Colpi , A. Possenti , A. C. Sippel , M. Dotti

Star clusters appear to be the ideal environment for the assembly of neutron star-neutron star (NS-NS) and black hole-neutron star (BH-NS) binaries. These binaries are among the most interesting astrophysical objects, being potential…

星系天体物理 · 物理学 2020-09-30 Giacomo Fragione , Sambaran Banerjee