Coupling between high and low latitudes as observed with LASCO in the solar corona and in interplanetary space

2000 ◽  
Vol 26 (5) ◽  
pp. 771-780 ◽  
Author(s):  
R. Schwenn
Keyword(s):  
Solar Corona ◽  
Interplanetary Space ◽  
Low Latitudes

scholarly journals Radio astronomy and the solar system

1959 ◽  
Vol 9 ◽  
pp. 3-7
Author(s):  
F. G. Smith
Keyword(s):  
Solar System ◽  
Solar Corona ◽  
Radio Astronomy ◽  
Interplanetary Space ◽  
Outer Space ◽  
The Sun

Radio astronomy has been expanding into outer space so fast in recent years that it is pleasant to find our own solar system at last receiving the attention it deserves. In this session we are concerned with everything within the system except the sun and our own planet. I start with a question, to which I shall return later: Where does the sun end? In another session you will hear of the experiments on the far-out parts of the solar corona; here we are concerned with interplanetary space as well as with the planets themselves, and what lies within this region may or may not be considered part of the solar corona.

STATISTICS OF DENSITY FLUCTUATIONS DURING THE TRANSITION FROM THE OUTER SOLAR CORONA TO THE INTERPLANETARY SPACE

2009 ◽  
Vol 706 (1) ◽  
pp. 238-243 ◽  
Author(s):  
D. Telloni ◽  
R. Bruno ◽  
V. Carbone ◽  
E. Antonucci ◽  
R. D'Amicis
Keyword(s):  
Solar Corona ◽  
Interplanetary Space ◽  
Density Fluctuations

scholarly journals Evolution of Magnetic Rayleigh–Taylor Instability into the Outer Solar Corona and Low Interplanetary Space

2018 ◽  
Vol 856 (1) ◽  
pp. 86 ◽  
Author(s):  
Sudheer K. Mishra ◽  
Talwinder Singh ◽  
P. Kayshap ◽  
A. K. Srivastava
Keyword(s):  
Solar Corona ◽  
Interplanetary Space ◽  
Taylor Instability ◽  
Rayleigh Taylor Instability

Tracing magnetic helicity from the solar corona to the interplanetary space

2005 ◽  
Vol 67 (17-18) ◽  
pp. 1734-1743 ◽  
Author(s):  
M.L. Luoni ◽  
C.H. Mandrini ◽  
Sergio Dasso ◽  
L. van Driel-Gesztelyi ◽  
P. Démoulin
Keyword(s):  
Solar Corona ◽  
Interplanetary Space ◽  
Magnetic Helicity

The spectrum of magnetic field irregularities in the solar corona and in interplanetary space

2000 ◽  
Vol 25 (9) ◽  
pp. 1973-1978 ◽  
Author(s):  
I.V. Chashei ◽  
A.I. Efimov ◽  
L.N. Samoznaev ◽  
M.K. Bird ◽  
M. Pätzold
Keyword(s):  
Magnetic Field ◽  
Solar Corona ◽  
Interplanetary Space

Time variations of directional cosmic ray intensity at low latitudes - III. Interpretation of solar daily variation and changes of east-west asymmetry

1961 ◽  
Vol 263 (1312) ◽  
pp. 127-135 ◽  
Keyword(s):  
Energy Spectrum ◽  
Interplanetary Space ◽  
Daily Variation ◽  
Cosmic Ray ◽  
Local Source ◽  
Cosmic Ray Intensity ◽  
The Earth ◽  
Low Latitudes ◽  
Time Variations ◽  
East West

The daily variation of cosmic ray intensity at low latitudes can under certain conditions be associated with an anisotropy of primary radiation. During 1957-8, this anisotropy had an energy spectrum of variation of the form aϵ -0.8±0.3 and corresponded to a source situated at an angle of 112 ± 10° to the left of the earth-sun line. The daily variation which can be associated with a local source situated along the earth-sun line has an energy spectrum of variation of the form aϵ 0 . Increases in east-west asymmetry and the associated daily variation for east and west directions can be explained by the acceleration of cosmic ray particles crossing beams of solar plasma in the neighbourhood of the earth. For beams of width 5 x 10 12 cm with a frozen magnetic field of the order of 10 -4 G, a radial velocity of about 1.5 x 108 cm/s is required. The process is possible only if the ejection of beams takes place in rarefied regions of inter­ planetary space which extend radially over active solar regions. An explanation of Forbush, type decreases observed at great distances from the earth requires similar limitation on the plasma density and conductivity of regions of interplanetary space. The decrease of east-west asymmetry associated with world-wide decreases of intensity and with SC magnetic storms is consistent with a screening of the low-energy cosmic ray particles due to magnetic fields in plasma clouds.

scholarly journals Proposal for an Interplanetary Mission to Sound the Outer Regions of the Solar Corona

1980 ◽  
Vol 91 ◽  
pp. 541-545
Author(s):  
H. Porsche ◽  
H. Volland ◽  
K. Bird ◽  
P. Edenhofer
Keyword(s):  
Solar Corona ◽  
Interplanetary Space ◽  
Orbital Periods ◽  
Interplanetary Mission

The mission of HELIOS had been started in order to investigate in situ the innermost regions of the interplanetary space. The two spacecraft achieved a perihelion of about 0.3 AU solar distance. Fig. 1 is a sketch of the two orbits. The orbital periods are 190 resp. 186 d.

Solar type III radio burst fine structure from Langmuir wave motion through turbulent plasma

2021 ◽  
Author(s):  
Eduard Kontar ◽  
Hamish Reid
Keyword(s):  
Fine Structure ◽  
Solar Corona ◽  
Interplanetary Space ◽  
Langmuir Wave ◽  
Turbulent Medium ◽  
Density Fluctuations ◽  
Solar Radio Emission ◽  
Langmuir Waves ◽  
Type Iii ◽  
Diagnostic Potential

<div>The Sun frequently accelerates near-relativistic electron beams that travel out through the solar corona and interplanetary space. Interacting with their plasma environment, these beams produce type III radio bursts, the brightest astrophysical radio sources detected by humans. The formation and motion of type III fine frequency structures is a puzzle but is commonly believed to be related to plasma turbulence in the solar corona and solar wind. Combining a theoretical framework with kinetic simulations and high-resolution radio type III observations, we quantitatively show that the fine structures are caused by the moving intense clumps of Langmuir waves in a turbulent medium. Our results show how type III fine structure can be used to remotely analyse the intensity and spectrum of compressive density fluctuations, and can infer ambient temperatures in astrophysical plasma, both significantly expanding the current diagnostic potential of solar radio emission.</div><div> </div>

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