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Measurements of average pulse profiles made with a single linear polarization over the range 41-112 MHz are presented for PSR B0950+08. We show that the observed variable structure of the pulse profiles is a result of Faraday sinusoidal…

天体物理学 · 物理学 2009-11-10 T. V. Shabanova , Yu. P. Shitov

The spectral energy distribution from the X-ray to the very high energy regime ($>100$ GeV) has been investigated for the $\gamma$-ray binary system PSR B1259-63/SS2883 as a function of orbital phase within the framework of a simple model…

高能天体物理现象 · 物理学 2009-08-11 Jumpei Takata , Ronald E. Taam

We report the COMPTEL detection of pulsed $\gamma$-emission from PSR B1509-58 up to at least 10 MeV using data collected over more than 6 years. The 0.75-10 MeV lightcurve is broad and reaches its maximum near radio-phase 0.38, slightly…

天体物理学 · 物理学 2007-05-23 L. Kuiper , W. Hermsen , J. M. Krijger , K. Bennett , V. Schoenfelder , A. Carraminana , R. Manchester , M. Bailes

We present polarization profiles of 23 pulsars exhibiting interpulse (IP) emissions using the Five-hundred-meter Aperture Spherical Radio Telescope (FAST). By applying the rotating vector model (RVM), we measured the inclination and impact…

高能天体物理现象 · 物理学 2025-03-19 S. N. Sun , N. Wang , W. M. Yan , S. Q. Wang

A statistical model of the polarization of pulsar radio emission is used to derive the general statistics of a polarization vector's orientation angles. The theoretical distributions are compared with orientation angle histograms computed…

天体物理学 · 物理学 2009-11-11 Mark M. McKinnon

We report on the variation in the single-pulse emission from PSR J1900+4221 (CRAFTS 19C10) observed at frequency centered at 1.25 GHz using the Five-hundred-meter Aperture Spherical radio Telescope. The integrated pulse profile shows two…

We have monitored a large sample of millisecond pulsars using the 100-m Effelsberg radio telescope in order to compare their radio emission properties to the slowly rotating population. With some notable exceptions, our findings suggest…

天体物理学 · 物理学 2009-10-30 M. Kramer , K. M. Xilouris , D. Lorimer , O. Doroshenko , A. Jessner , R. Wielebinski , A. Wolszczan , F. Camilo

We present high signal-to-noise ratio, multi-frequency polarization pulse profiles for 24 millisecond pulsars that are being observed as part of the Parkes Pulsar Timing Array (PPTA) project. The pulsars are observed in three bands, centred…

We present a Bayesian method to constrain the masses and radii of neutron stars (NSs) using the information encoded in the X-ray pulse profiles of accreting millisecond pulsars. We model the shape of the pulses using "oblate Schwarzschild"…

高能天体物理现象 · 物理学 2018-10-31 T. Salmi , J. Nättilä , J. Poutanen

Refractive scintillation effects are powerful techniques for discriminating between different models proposed for the electron density fluctuation spectrum in the ISM. Data from our long-term scintillation study of 18 pulsars in the DM…

天体物理学 · 物理学 2009-10-31 N. D. Ramesh Bhat , Yashwant Gupta , A. Pramesh Rao

We have observed a total of 67 pulsars at five frequencies ranging from 243 to 3100 MHz. Observations at the lower frequencies were made at the Giant Metre Wave Telescope in India and those at higher frequencies at the Parkes Telescope in…

天体物理学 · 物理学 2009-11-13 Simon Johnston , Aris Karastergiou , Dipanjan Mitra , Yashwant Gupta

Inverse Compton Scattering (ICS) has gained much attention recently because of its promise for the development of table-top-size X-ray light sources. Precise and fast simulation is an indispensable tool for predicting the radiation property…

计算物理 · 物理学 2022-11-08 Yi-Kai Kan , Franz X. Kärtner , Sabine Le Borne , Daniel Ruprecht , Jens-Peter M. Zemke

Some radio pulsar profiles (in particular those of millisecond pulsars contain wide emission structures which cover large intervals of pulse phase. Local distortions of an average curve of polarisation angle (PA) can be identified in such…

高能天体物理现象 · 物理学 2016-08-03 J. Dyks , M. Serylak , S. Oslowski , L. Saha , L. Guillemot , I. Cognard , B. Rudak

Since the launch of the Fermi Gamma-Ray Space Telescope, several hundred gamma-ray pulsars have been discovered, some being radio-loud and some radio-quiet with time-aligned radio and gamma-ray light curves. In the second Fermi Pulsar…

高能天体物理现象 · 物理学 2021-03-17 O. Benli , J. Petri , Dipanjan Mitra

In this paper we demonstrate that a large, unexplored reservoir of information about pulsar emission exists, that is directly linked to the radiating particles and their radiation process: We present a study of flux density measurements of…

天体物理学 · 物理学 2009-11-10 M. Kramer , A. Karastergiou , Y. Gupta , S. Johnston , N. D. R. Bhat , A. G. Lyne

Modeling energy-dependent X-ray pulse profiles from rotation-powered millisecond pulsars observed with NICER has emerged as a promising avenue for measuring neutron star radii and probing the equation of state of cold, ultra-dense matter.…

高能天体物理现象 · 物理学 2026-01-06 Tolga Guver , Dimitrios Psaltis , Feryal Ozel , Tong Zhao

LOFAR offers the unique capability of observing pulsars across the 10-240 MHz frequency range with a fractional bandwidth of roughly 50%. This spectral range is well-suited for studying the frequency evolution of pulse profile morphology…

We for the first time propose a physical model of the precursor (PR) and interpulse (IP) components of the radio pulsar profiles. It is based on propagation effects in the secondary plasma flow of a pulsar. The components are suggested to…

星系天体物理 · 物理学 2009-04-28 S. A. Petrova

We show that surface waves along interstellar current sheets closely aligned with the line of sight lead to pulsar scintillation properties consistent with those observed. This mechanism naturally produces the length and density scales of…

星系天体物理 · 物理学 2015-06-15 Ue-Li Pen , Yuri Levin

We calculate the beaming of coherent emission by means of geometrical optics. When spherical elementary waves are phase-coupled in that way that constructive interference occurs along one axis, the intensity is lower for off-axis viewing…

天体物理学 · 物理学 2007-05-23 Thomas Kunzl , Harald Lesch , Axel Jessner