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相关论文: Faraday Rotation Distributions from Stellar Magnet…

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We have analyzed analytically the Faraday rotation of an electromagnetic wave for magnetoactive thin metallic film with a nanostructured surface profile. Periodical as well as random surface profiles were considered. The plasmon…

介观与纳米尺度物理 · 物理学 2014-02-21 Zhyrair Gevorkian , Vladimir Gasparian

The origin of magnetic fields in the Universe is an open problem in astrophysics and fundamental physics. Our present-day knowledge is limited to regions of strong magnetic fields and to star-forming disks of galaxies. Low-energy electrons…

宇宙学与河外天体物理 · 物理学 2009-09-02 Rainer Beck

We have detected significant Rotation Measure variations for 9 bright pulsars, as a function of pulse longitude. An additional sample of 10 pulsars showed a rather constant RM with phase, yet a small degree of RM fluctuation is visible in…

星系天体物理 · 物理学 2015-05-13 A. Noutsos , A. Karastergiou , M. Kramer , S. Johnston , B. W. Stappers

Studying the nature and origin of the intergalactic magnetic field (IGMF) is an outstanding problem of cosmology. Measuring Faraday rotation would be a promising method to explore the IGMF in the large-scale structure (LSS) of the universe.…

宇宙学与河外天体物理 · 物理学 2015-05-19 Takuya Akahori , Dongsu Ryu

We present a study of the line-of-sight magnetic fields in five large-diameter Galactic HII regions. Using the Faraday rotation of background polarized radio sources, as well as dust-corrected H-alpha surface brightness as a probe of…

星系天体物理 · 物理学 2015-05-28 Lisa Harvey-Smith , Gregory J. Madsen , Bryan M. Gaensler

Deriving the Faraday rotation measure (RM) of quasar absorption line systems, which are tracers of high-redshift galaxies intervening background quasars, is a powerful tool for probing magnetic fields in distant galaxies. Statistically…

We revisit the polarisation induced by Faraday rotation when Cosmic Microwave Background photons traverse magnetised plasma. We compute the secondary B-mode angular power spectrum from Faraday rotation due to magnetic fields in galaxies and…

天体物理学 · 物理学 2009-04-17 Hiroyuki Tashiro , Nabila Aghanim , Mathieu Langer

The extreme, time-variable Faraday rotation observed in the repeating fast radio burst (FRB) 121102 and its associated persistent synchrotron source demonstrates that some FRBs originate in dense, dynamic and possibly relativistic…

高能天体物理现象 · 物理学 2019-03-27 H. K. Vedantham , V. Ravi

In this work, we present a new mosaic created with the second release of LOFAR Two-Metre Sky Survey data (LoTSS-DR2), which probes polarised synchrotron emission in the high-latitude inner Galaxy. Our objective is to characterise the…

Rotationally-split modes can provide valuable information about the internal rotation profile of stars. This has been used for years to infer the internal rotation behavior of the Sun. The present work discusses the potential additional…

太阳与恒星天体物理 · 物理学 2015-05-18 J. C. Suárez , L. Andrade , M. J. Goupil , E. Janot-Pacheco

We present multi-frequency polarization observations of the diffuse radio synchrotron background modulated by Faraday rotation. No total intensity is observed, indicating that total intensity does not vary on scales below approximately a…

天体物理学 · 物理学 2007-05-23 M. Haverkorn , P. Katgert , A. G. de Bruyn

The problem of cosmic-ray scattering in the turbulent electromagnetic fields of the interstellar medium and the solar wind is of great importance due to the variety of applications of the resulting diffusion coefficients. Examples are…

高能天体物理现象 · 物理学 2015-05-20 R. C. Tautz

The Galactic Faraday depth sky is a tracer for both the Galactic magnetic field and the thermal electron distribution. It has been previously reconstructed from polarimetric measurements of extra-galactic point sources. Here, we improve on…

星系天体物理 · 物理学 2020-01-29 Sebastian Hutschenreuter , Torsten A. Enßlin

One of the major discoveries of asteroseismology is the signature of a strong extraction of angular momentum (AM) in the radiative zones of stars across the entire Hertzsprung-Russell diagram, resulting in weak core-to-surface rotation…

太阳与恒星天体物理 · 物理学 2022-09-21 Hachem Dhouib , Stéphane Mathis , Lisa Bugnet , Timothy Van Reeth , Conny Aerts

Magnetic fields play a fundamental role in the formation of protostellar winds. In the magneto-centrifugal models, poloidal magnetic fields launch winds from accretion disks, and fast-rotating gas twists the fields into toroidal geometry…

太阳与恒星天体物理 · 物理学 2026-04-15 Tao-Chung Ching , Zhi-Yun Li , Qizhou Zhang , Josep Miquel Girart , Shih-Ping Lai , Chin-Fei Lee , Di Li , Ramprasad Rao , Emmanuel Momjian

We use Faraday rotation measurements from the latest catalog LoTSS DR2 from LOFAR to probe intergalactic magnetic fields. To identify the extragalactic component of the observed rotation measure (RM) we use two different techniques:…

宇宙学与河外天体物理 · 物理学 2024-04-29 Kyrylo Bondarenko , Alexey Boyarsky , Anastasia Sokolenko , Ievgen Vovk

Several multi-frequency polarization studies have shown the presence of systematic Faraday Rotation gradients across the parsec-scale jets of Active Galactic Nuclei (AGN), taken to be due to the systematic variation of the line-of-sight…

宇宙学与河外天体物理 · 物理学 2015-05-13 M. Mahmud , D. C. Gabuzda , V. Bezrukovs

Magnetic fields in large scale structure filaments beyond galaxy clusters remain poorly understood. Superclusters offer a unique setting to study these low density environments, where weak signals make detection challenging. The Faraday…

宇宙学与河外天体物理 · 物理学 2025-03-13 G. V. Pignataro , S. P. O'Sullivan , A. Bonafede , G. Bernardi , F. Vazza , E. Carretti

Faraday rotation measure synthesis is a method for analyzing multichannel polarized radio emissions, and it has emerged as an important tool in the study of galactic and extra-galactic magnetic fields. The method requires the recovery of…

宇宙学与河外天体物理 · 物理学 2015-06-03 M. Andrecut , J. M. Stil , A. R. Taylor

Optical and infrared continuum polarization from the interstellar medium is known to generally be due to irregular dust grains aligned with the magnetic field. This provides an important tool to probe the geometry and strength of those…

星系天体物理 · 物理学 2019-03-20 Ilija Medan , B-G Andersson