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The structure of the photospheric vector magnetic field below a dark filament on the Sun is studied using the observations of the Spectro-Polarimeter attached to the Solar Optical Telescope onboard Hinode. Special attention is paid to…

Solar and Stellar Astrophysics · Physics 2019-03-20 Takaaki Yokoyama , Yukio Katsukawa , Masumi Shimojo

The polarization data of the radio galaxy NGC4869, belonging to the Coma cluster and located in its central region, allow us to obtain information on the structure of magnetic field associated with the cluster itself. A magnetic field of…

Astrophysics · Physics 2008-02-03 L. Feretti , D. Dallacasa , G. Giovannini , A. Tagliani

The current state of research of the Galactic magnetic field is reviewed critically. The average (equipartition) strength of the total field derived from radio synchrotron data is 6 +/- 2 muG locally and about 10 +/- 3 muG at 3 kpc Galactic…

Astrophysics · Physics 2021-04-28 Rainer Beck

Interstellar magnetic fields play critical roles in many astrophysical processes. Yet despite their importance, our knowledge about magnetic fields in our Galaxy remains limited. For the field within the Milky Way, much of what we do know…

Astrophysics of Galaxies · Physics 2010-12-15 Cameron Van Eck , Jo-Anne Brown

The simulations of the formation of cosmological structure allows to determine the spatial inhomogeneity of cosmic magnetic fields. Such simulations, however, do not give an absolute number for the strength of the magnetic field due to…

Astrophysics · Physics 2007-05-23 Peter L. Biermann , Hyesung Kang , Joerg P. Rachen , Dongsu Ryu

We present an extensive study of angle-dependent transverse magnetoresistance in bismuth, with a magnetic field perpendicular to the applied electric current and rotating in three distinct crystallographic planes. The observed angular…

Strongly Correlated Electrons · Physics 2015-06-11 Aurelie Collaudin , Benoit Fauque , Yuki Fuseya , Woun Kang , Kamran Behnia

To estimate the parameters of the Galactic spiral structure - namely, the pitch angle i and the number of spiral arms,- data on Galactic masers with known trigonometric parallaxes were used. We applied the well-known method based on…

Astrophysics of Galaxies · Physics 2015-06-17 Vadim V. Bobylev , Anisa T. Bajkova

To pinpoint the peak location of the synchrotron total intensity emission in a spiral arm, we use a map of the spiralarm locations (from the observed arm tangent). Thus In a typical spiral arm in Galactic Quadrant I, we find the peak of the…

Astrophysics of Galaxies · Physics 2022-10-31 Jacques P Vallee

We investigate the magnetization reversal in Fe/MgO(001) films with fourfold in-plane magnetic anisotropy and an additional uniaxial anisotropy whose orientation and strength are tuned using different growth geometries and post growth…

Materials Science · Physics 2015-05-13 Qing-feng Zhan , Stijn Vandezande , Kristiaan Temst , Chris Van Haesendonck

Observational evidence for dynamo action in spiral galaxies is reviewed, and the capabilities of various theories in explaining the basic features of galactic magnetic fields are discussed. Mean-field dynamo models appear to be unique in…

Astrophysics · Physics 2007-05-23 Anvar Shukurov

Magnetic fields in the intracluster medium (ICM) affect the structure and the evolution of galaxy clusters. However, their properties are largely unknown, and measuring magnetic fields in galaxy clusters is challenging, especially on…

Astrophysics of Galaxies · Physics 2020-10-14 Yue Hu , A. Lazarian , Yuan Li , Irina Zhuravleva , Marie-Lou Gendron-Marsolais

We present 850 {\mu}m thermal dust polarization observations with a resolution of 14.4"(~ 0.13 pc) towards an infrared dark cloud G16.96+0.27 using JCMT/POL-2. The average magnetic field orientation, which roughly agrees with the…

It was experimentally observed that both magnetic anisotropy and spin-orbit interaction strength change when the magnetization of the nanomagnet is reversed. This indicates a variation in spin-orbit interaction strength depending on whether…

Mesoscale and Nanoscale Physics · Physics 2024-07-10 Vadym Zayets

A method for alignment of a vector magnetometer to a rigidly attached prism is presented. This enables optical comparison of the magnetometer axes to physical surfaces in an apparatus, and thus an absolute determination of the magnetic…

Instrumentation and Detectors · Physics 2017-05-24 M. R. Dietrich , K. G. Bailey , T. P. O'Connor

We present U,B,V,R,I imaging polarimetry of NGC 2100 and its surrounding environment, which comprise a part of the LMC 2 supershell. The morphology of the observed position angle distribution provides a tracer of the projected magnetic…

Astrophysics · Physics 2009-11-13 John P. Wisniewski , Karen S. Bjorkman , Antonio M. Magalhaes , Antonio Pereyra , ;

Magnetic fields are amplified as a consequence of galaxy formation and turbulence-driven dynamos. Galaxy mergers can potentially amplify the magnetic fields from their progenitors, making the magnetic fields dynamically important. However,…

Astrophysics of Galaxies · Physics 2021-04-05 Enrique Lopez-Rodriguez

A weak fluctuating magnetic field embedded into a turbulent conducting medium grows exponentially while its characteristic scale decays. In the ISM and protogalactic plasmas, the magnetic Pr is very large, so a broad spectrum of growing…

Astrophysics · Physics 2008-11-26 Alexander Schekochihin , Steven Cowley , Jason Maron , Leonid Malyshkin

The rotating vector model and radius-to-frequency mapping in the presence of multipole magnetic field in pulsars and magnetars are considered. An axisymmetric potential field is assumed. It is found that: (1) The radiation beam in the case…

High Energy Astrophysical Phenomena · Physics 2023-10-12 J. L. Qiu , H. Tong , H. G. Wang

Observations of regular magnetic fields in several nearby galaxies reveal magnetic arms situated between the material arms. The nature of these magnetic arms is a topic of active debate. Previously we found a hint that taking into account…

Astrophysics of Galaxies · Physics 2015-06-11 David Moss , Rodion Stepanov , Marita Krause , Rainer Beck , Dmitri Sokoloff

Millisecond pulsars are rather weakly-magnetized neutron stars which are thought to have been spun up by disc accretion, with magnetic linkage between the star and the disc playing a key role. Their spin history depends sensitively on…

Solar and Stellar Astrophysics · Physics 2013-10-28 L. Naso , W. Kluźniak , J. C. Miller