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The pulsar profile is characterised by two distinct emission components, the core and the cone. The standard model of a pulsar radio emission beam originating from dipolar magnetic fields, places the core at the centre surrounded by…

High Energy Astrophysical Phenomena · Physics 2022-03-30 Rahul Basu , Dipanjan Mitra , George I. Melikidze

We use a set of carefully selected published average multifrequency polarimetric observations for six bright cone dominated pulsars and devise a method to combine the multifrequency polarization position angle (PPA) sweep traverses. We…

Astrophysics · Physics 2009-11-10 Dipanjan Mitra , X. H. Li

Pulsar winds have been shown to be preferred sites of particle acceleration and high-energy radiation. Numerous studies have been conducted to better characterize the general structure of such relativistic plasmas in isolated systems.…

High Energy Astrophysical Phenomena · Physics 2025-01-06 Valentina Richard-Romei , Benoît Cerutti

Recent calculations are presented of top quark polarization in $t\bar t$ pair production close to threshold. S-P-wave interference gives contributions to all components of the top quark polarization vector. Rescattering of the decay…

High Energy Physics - Phenomenology · Physics 2007-05-23 M. Jezabek , R. Harlander , J. H. Kuehn , M. Peter

Significance: The depolarization of circularly polarized light caused by scattering in turbid media reveals structural information about the dispersed particles, such as their size, density, and distribution, which is useful for…

Medical Physics · Physics 2024-06-05 Nozomi Nishizawa , Asato Esumi , Yukito Ganko

We predict high-order harmonics in which the polarization within the spectral bandwidth of each harmonic varies continuously and significantly. For example, the interaction of counter-rotating circularly-polarized bichromatic drivers having…

Optics · Physics 2014-10-24 Avner Fleischer , Ofer Kfir , Pavel Sidorenko , Oren Cohen

We assume that the relativistic sources moving along the dipolar magnetic field lines emit curvature radiation. The beamed emission occurs in the direction of tangents to the field lines, and to receive it, the sight line must align with…

Astrophysics · Physics 2009-11-10 R. T. Gangadhara

Measuring top polarization is extremely important in understanding any new physics that couples to top quark. Here, we take up the task of extracting polarization of top quark coming from TeV-scale stop decay at the upgraded high luminosity…

High Energy Physics - Phenomenology · Physics 2021-11-30 Jayita Lahiri

We consider the consequences of appreciable line optical depth for the profile shape of X-ray emission lines formed in stellar winds. The hot gas is thought to arise in distributed wind shocks, and the line formation is predominantly via…

Astrophysics · Physics 2015-06-24 R. Ignace , K. G. Gayley

Precursors and postcursors (PPCs) are rare emission components detected in a handful of pulsars that appear beyond the main pulse emission, in some cases far away from it. In this paper we attempt to characterize the PPC emission in…

Astrophysics of Galaxies · Physics 2015-06-23 Rahul Basu , Dipanjan Mitra , Joanna M. Rankin

Pulse shaping provides a significant level of control and precision when optimizing laser-plasma interactions. Pulse shaping enables precise control and manipulation, resulting in enhanced energy deposition, optimized particle acceleration,…

Plasma Physics · Physics 2024-03-26 A. A. Molavi Choobini , F. M. Aghamir , S. S. Ghaffari-Oskooei

A beam of rotating dipolar particles (molecules or clusters) will broaden when passed through an electric or magnetic field gradient region. This broadening, which is a common experimental observable, can be expressed in terms of the…

Atomic and Molecular Clusters · Physics 2012-01-05 Jaap Bulthuis , Vitaly V. Kresin

We report on our analysis of a large sample of energy dependent pulse profiles of the X-ray binary pulsar Hercules X-1. We find that all data are compatible with the assumption of a slightly distorted magnetic dipole field as sole cause of…

Astrophysics · Physics 2009-10-31 S. Blum , U. Kraus

We have developed a model for the polarization of curvature radiation by taking into account the polar-cap-current induced perturbation on the dipolar magnetic field. We present the effects of the polar cap current on the pulsar radio…

High Energy Astrophysical Phenomena · Physics 2012-08-09 D. Kumar , R. T. Gangadhara

We investigate the effects of new physics scenarios containing a high mass vector resonance on top pair production at the LHC, using the polarization of the produced top. In particular we use kinematic distributions of the secondary lepton…

High Energy Physics - Phenomenology · Physics 2010-04-20 Rohini M Godbole , Saurabh D Rindani , Kumar Rao , Ritesh K Singh

High-energy spin-polarized electron, positron, and $\gamma$-photon beams have many significant applications in the study of material properties, nuclear structure, particle physics, and high-energy astrophysics. Thus,efficient production of…

Plasma Physics · Physics 2022-05-09 Ting Sun , Qian Zhao , Kun Xue , Zhi-Wei Lu , Liang-Liang Ji , Feng Wan , Yu Wang , Yousef I. Salamin , Jian-Xing Li

There is an ongoing debate about the origin and even the very existence of a high degree of linear polarization of some chromospheric spectral lines observed in solar flares. The standard explanation of these measurements is in terms of the…

Solar and Stellar Astrophysics · Physics 2015-06-17 Jiri Stepan , Petr Heinzel

Single pulse data on radio pulsar polarization are traditionally presented in the form of two-dimentional greyscale patterns with the pulse longitude and polarization angle (PA) on the horizontal and vertical axis, respectively. Such…

High Energy Astrophysical Phenomena · Physics 2020-06-03 J. Dyks

Polarimetric properties of blazars allow us to put constraints on the acceleration mechanisms that fuel their powerful jets. By studying the multiwavelength polarimetric behaviour of high synchrotron peaked (HSP) and low synchrotron peaked…

High Energy Astrophysical Phenomena · Physics 2025-08-21 Sara Capecchiacci , Ioannis Liodakis , Riccardo Middei , Dawoon E. Kim , Laura Di Gesu , Ivan Agudo , Beatriz Agis-Gonzalez , Axel Arbet-Engels , Dmitry Blinov , Chien-Ting Chen , Steven R. Ehlert , Ephraim Gau , Lea Heckmann , Kun Hu , Svetlana G. Jorstad , Philip Kaaret , Pouya M. Kouch , Henric Krawczynski , Elina Lindfors , Frederic Marin , Alan P. Marscher , Ioannis Myserlis , Stephen L. O'Dell , Luigi Pacciani , David Paneque , Matteo Perri , Simonetta Puccetti , M. Lynne Saade , Fabrizio Tavecchio , Allyn F. Tennant , Efthalia Traianou , Martin C. Weisskopf , Kinwah Wu , Francisco Jose Aceituno , Giacomo Bonnoli , Victor Casanova , Gabriel Emery , Juan Escudero , Daniel Morcuende , Jorge Otero-Santos , Alfredo Sota , Vilppu Piirola , George A. Borman , Evgenia N. Kopatskaya , Elena G. Larionova , Daria A. Morozova , Ekaterina V. Shishkina , Sergey S. Savchenko , Andrey A. Vasilyev , Tatiana S. Grishina , Ivan S. Troitskiy , Alexey V. Zhovtan , Callum McCall , Helen E. Jermak , Iain A. Steele , Rumen Bachev , Anton Strigachev , Ryo Imazawa , Mahito Sasada , Yasushi Fukazawa , Koji S. Kawabata , Makoto Uemura , Tsunefumi Mizuno , Tatsuya Nakaoka , Sumie Tochihara , Takahiro Akai , Hiroshi Akitaya , Andrei V. Berdyugin , Masato Kagitani , Vadim Kravtsov , Juri Poutanen , Takeshi Sakanoi , Diego Alvarez-Ortega , Carolina Casadio , Sincheol Kang , Sang-Sung Lee , Sanghyun Kim , Whee Yeon Cheong , Hyeon-Woo Jeong , Chanwoo Song , Shan Li , Myeong-Seok Nam , Mark Gurwell , Garrett Keating , Ramprasad Rao , Emmanouil Angelakis , Alexander Kraus , Petra Benke , Lena Debbrecht , Julia Eich , Florian Eppel , Andrea Gokus , Steven Hammerich , Jonas Hessdorfer , Matthias Kadler , Dana Kirchner , Georgios Filippos Paraschos , Florian Rosch , Wladislaw Schulga

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…

Astrophysics · Physics 2007-05-23 D. Mitra , J. H. Seiradakis