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相关论文: On the method of estimating emission altitude from…

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The radiation by relativistic plasma particles is beamed in the direction of field line tangents in the corotating frame, but in an inertial frame it is aberrated toward the direction of rotation. We have revised the relation of aberration…

天体物理学 · 物理学 2007-05-23 R. T. Gangadhara

We study the mean profiles of the multi--component pulsars PSRs B1839+09, B1916+14 and B2111+46. We estimate the emission height of the core components, and hence find the absolute emission altitudes corresponding to the conal components.…

星系天体物理 · 物理学 2015-05-18 R. M. C. Thomas , R. T. Gangadhara

We have analyzed the profile of the millisecond pulsar PSR J0437-4715 at 1440 MHz by fitting the Gaussians to pulse components, and identified its 11 emission components. We propose that they form a emission beam with 5 nested cones…

天体物理学 · 物理学 2007-05-23 R. T. Gangadhara , R. M. C. Thomas

Our motion relative to the cosmic-microwave-background (CMB) rest frame deflects light rays giving rise to shifts as large as L -> L(1+beta), where beta=0.00123 is our velocity (in units of the speed of light) on measurements CMB…

宇宙学与河外天体物理 · 物理学 2014-01-22 Donghui Jeong , Jens Chluba , Liang Dai , Marc Kamionkowski , Xin Wang

We present a new method for investigating emission altitudes of radio pulsar core and conal components by attributing them different altitudes and by providing a framework to understand the resulting longitude offsets between them which are…

天体物理学 · 物理学 2007-05-23 R. C. Kapoor , C. S. Shukre

This paper has been withdrawn by the author, due an error in Eq.(4.4), wherein a term of cosmological constant added into a theory of gravitation by Ref.[8], in which such the term is truly forbidden.

天体物理学 · 物理学 2007-05-23 V. V. Kiselev

The linear polarization position angle (PPA) of pulsar emission shows a wide variety of structures, which deviates from the classical rotating vector model. In this study we investigate the effect on the PPA due to emission arising from a…

天体物理学 · 物理学 2007-05-23 D. Mitra , J. H. Seiradakis

We show that the phase shift of {\pi}/2 is crucial for the phase space translation covariance of the measured high-amplitude limit observable in eight-port homodyne detection. However, for an arbitrary phase shift {\theta} we construct…

量子物理 · 物理学 2013-05-29 Pekka Lahti , Jussi Schultz

This paper presents a method of estimation of emission altitudes using observational data - precise measurements of pulse profile widths at low intensity level. The analysis of emission altitudes obtained using this method for a large…

天体物理学 · 物理学 2007-05-23 J. Kijak

We derive an expression for the phase shift of an atom interferometer in a gravitational field taking into account both the finite duration of the light pulses and the effect of a small perturbing potential added to a stronger uniform…

量子物理 · 物理学 2019-04-02 A. Bertoldi , F. Minardi , M. Prevedelli

The calculation of the one-loop induced decay rate b -> s \gamma is improved by including radiative corrections to the charged Higgs mass and to the charged-Higgs-fermion-fermion vertex. It is shown how the radiative corrections modify the…

高能物理 - 唯象学 · 物理学 2009-10-22 Marco A. Diaz

It is of great important to study pulsar beam shapes if we are concerned with emission theories and pulsar birth rate. Both observations and/or the inverse Compton scattering model show that different emission components are emitted from…

天体物理学 · 物理学 2017-11-01 R. X. Xu , J. W. Xu , G. J. Qiao

We present a modification of the relativistic phase shift method of determining the radio emission geometry from pulsar magnetospheres proposed by Gangadhara & Gupta (2001). Our modification provides a method of determining radio emission…

天体物理学 · 物理学 2009-11-10 J. Dyks , B. Rudak , A. K. Harding

The magnetospheric locations of pulsar radio emission region are not well known. The actual form of the so--called radius--to--frequency mapping should be reflected in the aberration--retardation (A/R) effects that shift and/or delay the…

太阳与恒星天体物理 · 物理学 2009-11-13 K. Krzeszowski , D. Mitra , Y. Gupta , J. Kijak , J. Gil , A. Acharyya

Because of the corotation, the polarization angle (PA) curve of a pulsar lags the intensity profile by 4r/Rlc rad in pulse phase. I present a simple and short derivation of this delay-radius relation to show that it is not caused by the…

天体物理学 · 物理学 2009-11-13 J. Dyks

We present an analytical treatment of the pulsar radio emission height as a function of phase based on a set of simplifying assumptions. Assuming a dipole field geometry, the emission height can be expressed as a function of phase and the…

高能天体物理现象 · 物理学 2025-09-11 H. Tong , H. G. Wang

The following results of dissertation are submitted for defense: 1. Precise measurements of coordinates and proper motion of the pulsar PSR 0329+54 using the VLBI method. 2. Establishing of the reason for the discrepancy between the…

天体物理仪器与方法 · 物理学 2024-01-25 Alexander Evgenievich Rodin

This erratum addresses an error in the text of Lo et al. (2013) and more importantly corrects a computational error that was made in all previously published relativistic computations of absolute pulse waveform fluxes produced by hot spots…

高能天体物理现象 · 物理学 2018-03-14 Ka Ho Lo , M. Coleman Miller , Sudip Bhattacharyya , Frederick K. Lamb

The original computation did not take into account the initial phase shift. A corrected computation, included as section II in the revised version of gr-qc/0407039, still gives a term proportional to the derivative of the signal,…

广义相对论与量子宇宙学 · 物理学 2007-05-23 Stefano Foffa , Michele Papucci , Riccardo Sturani

Re-analyzing the old phase shift data of I=0, \pi\pi (I=1/2, K\pi) scattering, we show an evidence for existence of the \sigma-particle (\kappa-particle) with a comparatively light mass, which has been missing for a long time: In the…

高能物理 - 唯象学 · 物理学 2009-10-30 Taku Ishida , Muneyuki Ishida , Shin Ishida , Kunio Takamatsu , Tsuneaki Tsuru
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