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Related papers: 180$^\circ$ Rotations in the Polarization Angle fo…

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Recently, polarization angle (PA) orthogonal jumps over millisecond timescales were discovered from three bursts of a repeating fast radio burst source FRB 20201124A by the FAST telescope. In general, PA jumps can arise from the coherent or…

High Energy Astrophysical Phenomena · Physics 2025-12-03 Yuanhong Qu , Bing Zhang , Pawan Kumar

The polarization signatures of the blazar emissions are known to be highly variable. In addition to small fluctuations of the polarization angle around a mean value, sometimes large (> 180^o) polarization angle swings are observed. We…

High Energy Astrophysical Phenomena · Physics 2015-06-24 Haocheng Zhang , Xuhui Chen , Markus Boettcher , Fan Guo , Hui Li

Millimeter-band polarimetry offers a powerful probe of AGN jets, accessing regions less affected by opacity and Faraday rotation than at longer radio wavelengths. As part of the POLAMI program, we have conducted 14 years of 1 mm and 3 mm…

The lower energy peak of the spectral energy distribution of blazars has commonly been ascribed to synchrotron radiation from relativistic particles in the jets. Despite the consensus regarding jet emission processes, the particle…

High Energy Astrophysical Phenomena · Physics 2023-08-02 Riccardo Middei , Matteo Perri , Simonetta Puccetti , Ioannis Liodakis , Laura Di Gesu , Alan P. Marscher , Nicole Rodriguez Cavero , Fabrizio Tavecchio , Immacolata Donnarumma , Marco Laurenti , Svetlana G. Jorstad , Iván Agudo , Herman L. Marshall , Luigi Pacciani , Dawoon E. Kim , Francisco José Aceituno , Giacomo Bonnoli , Víctor Casanova , Beatriz Agís-González , Alfredo Sota , Carolina Casadio , Juan Escudero , Ioannis Myserlis , Albrecht Sievers , Pouya M. Kouch , Elina Lindfors , Mark Gurwell , Garrett K. Keating , Ramprasad Rao , Sincheol Kang , Sang-Sung Lee , Sang-Hyun Kim , Whee Yeon Cheong , Hyeon-Woo Jeong , Emmanouil Angelakis , Alexander Kraus , Lucio A. Antonelli , Matteo Bachetti , Luca Baldini , Wayne H. Baumgartner , Ronaldo Bellazzini , Stefano Bianchi , Stephen D. Bongiorno , Raffaella Bonino , Alessandro Brez , Niccolò Bucciantini , Fiamma Capitanio , Simone Castellano , Elisabetta Cavazzuti , Chien-Ting Chen , Stefano Ciprini , Enrico Costa , Alessandra De Rosa , Ettore Del Monte , Niccolò Di Lalla , Alessandro Di Marco , Victor Doroshenko , Michal Dovčiak , Steven R. Ehlert , Teruaki Enoto , Yuri Evangelista , Sergio Fabiani , Riccardo Ferrazzoli , Javier A. García , Shuichi Gunji , Kiyoshi Hayashida , Jeremy Heyl , Wataru Iwakiri , Philip Kaaret , Vladimir Karas , Fabian Kislat , Takao Kitaguchi , Jeffery J. Kolodziejczak , Henric Krawczynski , Fabio La Monaca , Luca Latronico , Simone Maldera , Alberto Manfreda , Frédéric Marin , Andrea Marinucci , Francesco Massaro , Giorgio Matt , Ikuyuki Mitsuishi , Tsunefumi Mizuno , Fabio Muleri , Michela Negro , Chi-Yung Ng , Stephen L. O'Dell , Nicola Omodei , Chiara Oppedisano , Alessandro Papitto , George G. Pavlov , Abel L. Peirson , Melissa Pesce-Rollins , Pierre-Olivier Petrucci , Maura Pilia , Andrea Possenti , Juri Poutanen , Brian D. Ramsey , John Rankin , Ajay Ratheesh , Oliver J. Roberts , Roger W. Romani , Carmelo Sgrò , Patrick Slane , Paolo Soffitta , Gloria Spandre , Douglas A. Swartz , Toru Tamagawa , Roberto Taverna , Yuzuru Tawara , Allyn F. Tennant , Nicholas E. Thomas , Francesco Tombesi , Alessio Trois , Sergey S. Tsygankov , Roberto Turolla , Jacco Vink , Martin C. Weisskopf , Kinwah Wu , Fei Xie , Silvia Zane

We aim to investigate the relation between the long-term flux density and the position angle (PA) evolution of inner-jet in blazars. We have carried out the elliptic Gaussian model-fit to the `core' of 50 blazars from 15 GHz VLBA data, and…

High Energy Astrophysical Phenomena · Physics 2013-02-18 X. Liu , L. -G. Mi , B. -R. Liu , Q. -W Li

The full theory of polarized SiO maser emission from the near-circumstellar environment of Asymptotic Giant Branch stars has been the subject of debate, with theories ranging from classical Zeeman origins to predominantly non-Zeeman…

Solar and Stellar Astrophysics · Physics 2018-07-30 Taylor Tobin , Athol Kemball , Malcolm Gray

We investigate the optical polarization properties of high-energy BL Lac objects using data from the RoboPol blazar monitoring program and the Nordic Optical Telescope. We wish to understand if there are differences in the BL Lac objects…

We analyze the linear polarization of the relativistic jet in BL Lacertae object OJ~287 as revealed by multi-epoch Very Long Baseline Array (VLBA) images at 43 GHz and monitoring observations at optical bands. The electric-vector position…

We report on the variation in the optical polarization of the blazar PKS 1749+096 observed in 2008--2015. The degree of polarization (PD) tends to increase in short flares having a time-scale of a few days. The object favors a polarization…

High Energy Astrophysical Phenomena · Physics 2017-12-20 Makoto Uemura , Ryosuke Itoh , Ioannis Liodakis , Dmitry Blinov , Masanori Nakayama , Longyin Xu , Naoko Sawada , Hsiang-Yun Wu , Issei Fujishiro

This paper presents a simple model of polarisation rotation in optically thin relativistic jets of blazars. The model is based on the development of helical (kink) mode of current-driven instability. A possible explanation is suggested for…

High Energy Astrophysical Phenomena · Physics 2017-11-06 Krzysztof Nalewajko

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

In addition to the light curve and energy spectrum, polarization is also important for inferring the physical properties of the Gamma-ray burst (GRB). Rotation of the polarization angle (PA) with time will cause depolarization of the…

High Energy Astrophysical Phenomena · Physics 2024-08-19 Jia-Sheng Li , Hao-Bing Wang , Mi-Xiang Lan

The rotations of the polarization angle (PA) with time (energy) can lead to the depolarization of the time-integrated (energy-integrated) polarization. However, we don't know how and when it will rotate. Here, we consider the magnetic…

High Energy Astrophysical Phenomena · Physics 2023-06-30 Hao-Bing Wang , Mi-Xiang Lan

Using stacking of images obtained at different epochs, we studied the variability properties of linear polarization of active galactic nucleus (AGN) jets on parsec-scales. Our sample is drawn from the MOJAVE programme, and consists of 436…

High Energy Astrophysical Phenomena · Physics 2023-06-16 D. I. Zobnina , H. D. Aller , M. F. Aller , D. C. Homan , Y. Y. Kovalev , M. L. Lister , I. N. Pashchenko , A. B. Pushkarev , T. Savolainen

We present polarisation observations of five pulsars whose profiles exhibit two distinct emission regions separated by close to 180 degrees of longitude. We fitted the position angle of the linear polarisation using the rotating vector…

Solar and Stellar Astrophysics · Physics 2015-05-14 M. J. Keith , S. Johnston , M. Kramer , P. Weltevrede

Relativistic shocks are one of the most plausible sites of the emission of strongly variable, polarized multi-wavelength emission from relativistic jet sources such as blazars, via diffusive shock acceleration (DSA) of relativistic…

High Energy Astrophysical Phenomena · Physics 2016-09-06 Markus Boettcher

The $\gamma$-ray bright blazar CTA 102 is studied using imaging (new 15 GHz and archival 43 GHz Very Long Baseline Array, VLBA data) and time variable optical flux density, polarization degree and electric vector position angle (EVPA)…

High Energy Astrophysical Phenomena · Physics 2018-02-21 Xiaofeng Li , P. Mohan , T. An , Xiaoyu Hong , Xiaopeng Cheng , Jun Yang , Yingkang Zhang , Zhongli Zhang , Wei Zhao

We present strong observational evidence for a relationship between the direction of a pulsar's motion and its rotation axis. We show carefully calibrated polarization data for 25 pulsars, 20 of which display linearly polarized emission…

Astrophysics · Physics 2009-11-13 Simon Johnston , G. Hobbs , S. Vigeland , M. Kramer , J. M. Weisberg , A. G. Lyne

The polarization position angles (PA) of pulsar radio emission occupy a distribution that can be much wider than what is expected from the average linear polarization and the off-pulse instrumental noise. Contrary to our limited…

Astrophysics · Physics 2009-11-10 Mark M. McKinnon

Blazars are jetted active galactic nuclei, with the jet aligned along the observer's line of sight. Their spectral energy distributions are dominated by non-thermal emission, with an underlying thermal component at optical/ultraviolet…

High Energy Astrophysical Phenomena · Physics 2026-05-07 J. Barnard , B. van Soelen , I. P. van der Westhuizen , M. Böttcher , A. Martin-Carrillo , H. M. Schutte , S. van der Merwe , M. Zacharias