scholarly journals Magnetic fields in anisotropic relativistic stars

2015 ◽  
Vol 91 (4) ◽  
Author(s):  
Vladimir Folomeev ◽  
Vladimir Dzhunushaliev
Keyword(s):  
Magnetic Fields ◽  
Relativistic Stars ◽  
Anisotropic Relativistic Stars

scholarly journals New code for equilibriums and quasiequilibrium initial data of compact objects. IV. Rotating relativistic stars with mixed poloidal and toroidal magnetic fields

2019 ◽  
Vol 100 (12) ◽  
Author(s):  
Kōji Uryū ◽  
Shijun Yoshida ◽  
Eric Gourgoulhon ◽  
Charalampos Markakis ◽  
Kotaro Fujisawa ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Initial Data ◽  
Compact Objects ◽  
Relativistic Stars

scholarly journals INSTABILITY-DRIVEN EVOLUTION OF POLOIDAL MAGNETIC FIELDS IN RELATIVISTIC STARS

2011 ◽  
Vol 736 (1) ◽  
pp. L6 ◽  
Author(s):  
Riccardo Ciolfi ◽  
Samuel K. Lander ◽  
Gian Mario Manca ◽  
Luciano Rezzolla
Keyword(s):  
Magnetic Fields ◽  
Relativistic Stars ◽  
Poloidal Magnetic Fields

scholarly journals Interior solutions of relativistic stars with anisotropic matter in scale-dependent gravity

2021 ◽  
Vol 81 (1) ◽  
Author(s):  
Grigoris Panotopoulos ◽  
Ángel Rincón ◽  
Ilídio Lopes
Keyword(s):  
Compact Stars ◽  
Energy Conditions ◽  
Radial Coordinate ◽  
Relativistic Stars ◽  
Anisotropic Matter ◽  
Quark Stars ◽  
Mit Bag Model ◽  
Structure Equations ◽  
Interior Solutions ◽  
Anisotropic Relativistic Stars

AbstractWe obtain well behaved interior solutions describing hydrostatic equilibrium of anisotropic relativistic stars in scale-dependent gravity, where Newton’s constant is allowed to vary with the radial coordinate throughout the star. Assuming (1) a linear equation-of-state in the MIT bag model for quark matter, and (2) a certain profile for the energy density, we integrate numerically the generalized structure equations, and we compute the basic properties of the strange quark stars, such as mass, radius and compactness. Finally, we demonstrate that stability criteria as well as the energy conditions are fulfilled. Our results show that a decreasing Newton’s constant throughout the objects leads to slightly more massive and more compact stars.

Calculated Coronal Magnetic Fields and Their Comparison with the Coronal Structures as Observed during Five Solar Eclipses

1994 ◽  
Vol 144 ◽  
pp. 559-564
Author(s):  
P. Ambrož ◽  
J. Sýkora
Keyword(s):  
Magnetic Field ◽  
Solar Cycle ◽  
Magnetic Fields ◽  
Solar Corona ◽  
Coronal Magnetic Field ◽  
Coronal Magnetic Fields ◽  
Solar Eclipses ◽  
Coronal Structures

AbstractWe were successful in observing the solar corona during five solar eclipses (1973-1991). For the eclipse days the coronal magnetic field was calculated by extrapolation from the photosphere. Comparison of the observed and calculated coronal structures is carried out and some peculiarities of this comparison, related to the different phases of the solar cycle, are presented.

Radio Measurements of Coronal Magnetic Fields

1994 ◽  
Vol 144 ◽  
pp. 21-28 ◽  
Author(s):  
G. B. Gelfreikh
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Solar Corona ◽  
Active Regions ◽  
High Sensitivity ◽  
Coronal Magnetic Field ◽  
Transverse Magnetic ◽  
Radio Sources ◽  
Radio Waves ◽  
Solar Active Regions

AbstractA review of methods of measuring magnetic fields in the solar corona using spectral-polarization observations at microwaves with high spatial resolution is presented. The methods are based on the theory of thermal bremsstrahlung, thermal cyclotron emission, propagation of radio waves in quasi-transverse magnetic field and Faraday rotation of the plane of polarization. The most explicit program of measurements of magnetic fields in the atmosphere of solar active regions has been carried out using radio observations performed on the large reflector radio telescope of the Russian Academy of Sciences — RATAN-600. This proved possible due to good wavelength coverage, multichannel spectrographs observations and high sensitivity to polarization of the instrument. Besides direct measurements of the strength of the magnetic fields in some cases the peculiar parameters of radio sources, such as very steep spectra and high brightness temperatures provide some information on a very complicated local structure of the coronal magnetic field. Of special interest are the results found from combined RATAN-600 and large antennas of aperture synthesis (VLA and WSRT), the latter giving more detailed information on twodimensional structure of radio sources. The bulk of the data obtained allows us to investigate themagnetospheresof the solar active regions as the space in the solar corona where the structures and physical processes are controlled both by the photospheric/underphotospheric currents and surrounding “quiet” corona.

Sign in / Sign up

Export Citation Format

Share Document