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The magnetic activity of the Sun directly impacts the Earth and human life. Likewise, other stars will have an impact on the habitability of planets orbiting these host stars. The lack of information on the magnetic field in the higher…

The diversity of pulsar light-curves and radio polarisation properties originates in the structure of the magnetic field close to the stellar surface. For millisecond pulsars, this complexity is particularly puzzling. Fortunately, some…

高能天体物理现象 · 物理学 2026-04-22 J. Pétri , P. Stammler , L. Guillemot , S. Guillot , D. González-Caniulef , F. Jankowski , N. Webb

We determine magnetic fields from the photosphere to the upper chromosphere combining data from the Hinode satellite and the CLASP2.1 sounding rocket experiment. CLASP2.1 provided polarization profiles of the Mg~{|sc ii} $h$ and $k$ lines,…

We report analysis of sub-Alfv\'enic magnetohydrodynamic (MHD) perturbations in the low-\b{eta} radial-field solar wind using the Parker Solar Probe spacecraft data from 31 October to 12 November 2018. We calculate wave vectors using the…

太阳与恒星天体物理 · 物理学 2022-01-05 S. Q. Zhao , Huirong Yan , Terry Z. Liu , Mingzhe Liu , Mijie Shi

Our basic theoretical understanding of the sources of cosmic rays and their propagation through the interstellar medium is hindered by the Sun, that through the solar wind affects the observed cosmic-ray spectra. This effect is known as…

太阳与恒星天体物理 · 物理学 2022-10-12 Ilias Cholis , Ian McKinnon

The radio signal transmitted by the Mars Express (MEX) spacecraft was observed regularly between the years 2013-2020 at X-band (8.42 GHz) using the European Very Long Baseline Interferometry (EVN) network and University of Tasmania's…

Low-frequency radio observations of diffuse synchrotron radiation offer a unique vantage point for investigating the intricate relationship between gas and magnetic fields in the formation of structures within the Galaxy, spanning from the…

星系天体物理 · 物理学 2024-05-29 Andrea Bracco , Marco Padovani , Daniele Galli

We have carried out numerical hydrodynamic simulations of radio jets from active galactic nuclei using the PLUTO simulation code, with the aim of investigating the effect of different environments and intermittency of energy injection on…

高能天体物理现象 · 物理学 2018-08-14 Patrick Yates , Stanislav Shabala , Martin Krause

Studies of solar wind turbulence traditionally employ high-resolution magnetic field data, but high-resolution measurements of ion and electron moments have been possible only recently. We report the first turbulence studies of ion and…

Magnetic fields provide an important probe of the thermal, material, and structural history of planetary and sub-planetary bodies. Core dynamos are a potential source of magnetic fields for differentiated bodies, but evidence of…

地球与行星天体物理 · 物理学 2021-11-03 Atma Anand , Jonathan Carroll-Nellenback , Eric G. Blackman , John A. Tarduno

This paper reports on efforts to simulate wave propagation in the solar interior. Presented is work on extending a numerical code for constant entropy acoustic waves in the absence of magnetic fields to the case where magnetic fields are…

天体物理学 · 物理学 2008-05-06 T. Hartlep , M. S. Miesch , N. N. Mansour

Context. Studies on compact galaxy groups have led to the conclusion that a plenitude of phenomena take place in between galaxies that form them. However, radio data on these objects are extremely scarce and not much is known concerning the…

星系天体物理 · 物理学 2017-07-12 B. Nikiel Wroczyński , M. Urbanik , M. Soida , R. Beck , D. J. Bomans

Ultrahot Jupiters (UHJs), being the hottest class of exoplanets known, provide a unique laboratory for testing atmospheric interactions with internal planetary magnetic fields at a large range of temperatures. Thermal ionization of…

地球与行星天体物理 · 物理学 2024-09-24 Hayley Beltz , Emily Rauscher

Magnetohydrodynamic (MHD) waves are candidates for heating the solar chromosphere, although it is still unclear which mode of the wave is dominant in heating. We perform two-dimensional radiative MHD simulation to investigate the…

太阳与恒星天体物理 · 物理学 2021-08-04 Yikang Wang , Takaaki Yokoyama , Haruhisa Iijima

In the 21st century, new and alternative non-radioactive methods for cancer treatment have been developed. One of this is magnetic hyperthermia (MH), which is based on the ability of magnetic nanoparticles (MNP) to transduce electromagnetic…

医学物理 · 物理学 2020-07-28 Christian Calvache , Jenny Mera-Córdoba , Diego F. Coral

Magnetic fields permeate the Universe, including galaxy clusters, and affect the thermodynamical properties of the intra-cluster medium (ICM). Cosmological simulations predict that seed magnetic fields are amplified up to the $\mu$G-level…

宇宙学与河外天体物理 · 物理学 2025-08-14 A. Pagliotta , C. J. Riseley , A. Bonafede , C. Stuardi , F. Loi

Close-in terrestrial exoplanets around M dwarfs reside in dense, magnetized winds, where non-ideal plasma coupling can strongly affect how electromagnetic energy is redistributed within the dayside interaction region. We present…

地球与行星天体物理 · 物理学 2026-05-26 J. J. González-Avilés , N. Baltazar Pérez-Negrón , A. Segura

In space weather studies and forecasting we employ magnetohydrodynamic (MHD) simulations which can provide rather accurate reconstruction of the solar wind dynamics and its evolution. However, all MHD simulations are restricted by the input…

太阳与恒星天体物理 · 物理学 2023-06-14 G. M. Shaifullah , J. Magdalenic , C. Tiburzi , I. Jebaraj , E. Samara , P. Zucca

The planet-forming region of protoplanetary disks is cold, dense, and therefore weakly ionized. For this reason, magnetohydrodynamic (MHD) turbulence is thought to be mostly absent, and another mechanism has to be found to explain gas…

地球与行星天体物理 · 物理学 2017-04-05 William Béthune , Geoffroy Lesur , Jonathan Ferreira

We present numerical magnetohydrodynamic (MHD) simulations of the effect of stellar dipole magnetic fields on line-driven wind outflows from hot, luminous stars. Unlike previous fixed-field analyses, the simulations here take full account…

天体物理学 · 物理学 2011-05-05 Asif ud-Doula , Stanley P. Owocki
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