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相关论文: Orthogonal pulsars as a key test for pulsar evolut…

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Pulsars have at least two impressive applications. First, they can be used as highly accurate clocks, comparable in stability to atomic clocks; secondly, a small subset of pulsars, millisecond X-ray pulsars, provide all the necessary…

科普物理 · 物理学 2017-11-28 Clement Vidal

We discover alignment of galaxies in clusters by analyzing the distribution of their position angles. We assume that galaxies are aligned, if their number at one 90deg position angle interval is more than twice higher than at another 90deg…

星系天体物理 · 物理学 2019-10-08 Hrant M. Tovmassian , J. P. Torres-Papaqui

Magnetic interactions between a protostar and its accretion disc tend to induce warping in the disc and produce secular changes in the stellar spin direction, so that the spin axis may not always be perpendicular to the disc. This may help…

地球与行星天体物理 · 物理学 2015-05-20 Francois Foucart , Dong Lai

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

We study the long term orbital evolution of a terrestrial planet under the gravitational perturbations of a giant planet. In particular, we are interested in situations where the two planets are in the same plane and are relatively close.…

地球与行星天体物理 · 物理学 2016-06-15 Nikolaos Georgakarakos , Ian Dobbs-Dixon , Michael J. Way

We present radio intensity and polarisation profiles of 28 $\gamma$-ray-detected pulsars with the aim of putting constraints on their viewing geometries using data from the Parkes telescope. Constraints are formed both from the…

高能天体物理现象 · 物理学 2015-06-23 S. C. Rookyard , P. Weltevrede , S. Johnston

Pulsars are known to display short-term variability. Recently, examples of longer-term emission variability have emerged that are often correlated with changes in the rotational properties of the pulsar. To further illuminate this…

高能天体物理现象 · 物理学 2016-01-27 P. R. Brook , A. Karastergiou , S. Johnston , M. Kerr , R. M. Shannon , S. J. Roberts

We used the magneto-dipole radiation mechanism for the braking of radio pulsars to calculate the new values of magnetic inductions at the surfaces of neutron stars. For this aim we estimated the angles ? between the rotation axis and the…

综合物理 · 物理学 2017-07-26 E. B. Nikitina , I. F. Malov

We calculate detailed modification of pulses from a pulsar arising from the effects of phase transition induced density fluctuations on the pulsar moment of inertia. We represent general statistical density fluctuations using a simple model…

高能天体物理现象 · 物理学 2022-04-27 Partha Bagchi , Biswanath Layek , Anjishnu Sarkar , Ajit M. Srivastava

We have used the Nanshan 25-m Radio Telescope at Xinjiang Astronomical Observatory to obtain timing observations of 87 pulsars from 2002 July to 2014 March. Using the "Cholesky" timing analysis method we have determined positions and proper…

高能天体物理现象 · 物理学 2020-07-01 S. J. Dang , J. P. Yuan , R. N. Manchester , L. Li , N. Wang , J. B. Wang , G. Hobbs , Z. Y. Liu , F. F. Kou

For a selection of 35 pulsars with large spin-up glitches ($\Delta{\nu}/\nu\geq10^{-6}$), which are monitored by the Jodrell Bank Observatory, we analyse 157 glitches and their recoveries. All parameters are measured consistently and we…

Galaxies inhabiting a cluster environment experience significant evolution in their orbital motions throughout time; this is accompanied by changes in the anisotropy parameter, measuring the relative importance of radial and tangential…

宇宙学与河外天体物理 · 物理学 2015-06-11 Francesca Iannuzzi , Klaus Dolag

We review on the theoretical status of intense laser orientation and alignment. The evolution of the rotational wave packet and its dynamics leading to orientation and alignment is the topic of the present discussion. The major part of the…

原子物理 · 物理学 2021-04-14 Vijit V. Nautiyal , Sumana Devi , Ashish Tyagi , Bhawna Vidhani , Anjali Maan , Vinod Prasad

The magnetized induced Compton scattering off the particles of the ultrarelativistic electron-positron plasma of pulsar is considered. The main attention is paid to the transverse regime of the scattering, which holds in a moderately strong…

天体物理学 · 物理学 2009-11-13 S. A. Petrova

In more than four years of observation the Large Area Telescope on board the Fermi satellite has identified pulsed $\gamma$-ray emission from more than 80 young pulsars, providing light curves with high statistics. Fitting the observations…

高能天体物理现象 · 物理学 2015-02-11 M. Pierbattista , A. K. Harding , I. A. Grenier , T. J. Johnson , P. A. Caraveo , M. Kerr , P. L. Gonthier

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

Over the last fifty years since the discovery of pulsars, our understanding of where and how pulsars emit the radiation we observe has undergone significant revision. The location and mechanisms of high-energy radiation are intimately tied…

高能天体物理现象 · 物理学 2018-08-22 Alice K. Harding

The measurements of pulsar frequency second derivatives have shown that they are 1e2...1e6 times larger than expected for standard pulsar spin-down law. Moreover, the second derivatives as well as braking indices are even negative for about…

天体物理学 · 物理学 2008-11-26 Anton Biryukov , Gregory Beskin , Sergey Karpov , Lisa Chmyreva

I review the basic observational properties of accreting millisecond pulsars that are important for understanding the physics involved in formation of their pulse profiles. I then discuss main effects responsible for shaping these profiles.…

天体物理学 · 物理学 2008-11-27 Juri Poutanen

(Abridged) The rotational evolution of isolated neutron stars is dominated by the magnetic field anchored to the solid crust of the star. Assuming that the core field evolves on much longer timescales, the crustal field evolves mainly…

太阳与恒星天体物理 · 物理学 2013-06-11 Jose A. Pons , Daniele Vigano , Ulrich Geppert
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