Momentum flux invariance in the solar wind

1983 ◽  
Vol 272 ◽  
pp. 325 ◽  
Author(s):  
D. J. Mullan
Keyword(s):  
Solar Wind ◽  
Momentum Flux

Determination of the solar wind angular momentum flux from the HELIOS data - an observational test of the Weber and Davis theory

1983 ◽  
Vol 271 ◽  
pp. 335 ◽  
Author(s):  
V. Pizzo ◽  
R. Schwenn ◽  
E. Marsch ◽  
H. Rosenbauer ◽  
K.-H. Muehlhaeuser ◽  
...  
Keyword(s):  
Solar Wind ◽  
Angular Momentum ◽  
Momentum Flux ◽  
Observational Test

scholarly journals Solar cycle dependence of scaling in solar wind fluctuations

2008 ◽  
Vol 15 (3) ◽  
pp. 445-455 ◽  
Author(s):  
S. C. Chapman ◽  
B. Hnat ◽  
K. Kiyani
Keyword(s):  
Solar Wind ◽  
Solar Cycle ◽  
Momentum Flux ◽  
Magnetic Fluctuations ◽  
Mhd Turbulence ◽  
Scaling Properties ◽  
Two Component ◽  
Energy And Momentum ◽  
Cycle Dependence

Abstract. In this review we collate recent results for the statistical scaling properties of fluctuations in the solar wind with a view to synthesizing two descriptions: that of evolving MHD turbulence and that of a scaling signature of coronal origin that passively propagates with the solar wind. The scenario that emerges is that of coexistent signatures which map onto the well known "two component" picture of solar wind magnetic fluctuations. This highlights the need to consider quantities which track Alfvénic fluctuations, and energy and momentum flux densities to obtain a complete description of solar wind fluctuations.

Solar wind mass and momentum flux variations at 0.3 AU

1994 ◽  
Vol 14 (4) ◽  
pp. 135-138 ◽  
Author(s):  
P. Hick ◽  
B.V. Jackson
Keyword(s):  
Solar Wind ◽  
Momentum Flux

scholarly journals The solar wind angular-momentum flux observed during Solar Orbiter's first orbit

2021 ◽  
Author(s):  
Daniel Verscharen ◽  
David Stansby ◽  
Adam Finley ◽  
Christopher Owen ◽  
Timothy Horbury ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Solar Wind ◽  
Angular Momentum ◽  
Momentum Flux ◽  
Large Scale ◽  
Magnetic Field Data ◽  
Proton Data ◽  
Scale Properties ◽  
Orbiter Mission

<p>The Solar Orbiter mission is currently in its cruise phase, during which the spacecraft's in-situ instrumentation measures the solar wind and the electromagnetic fields at different heliocentric distances. </p><p>We evaluate the solar wind angular-momentum flux by combining proton data from the Solar Wind Analyser (SWA) Proton-Alpha Sensor (PAS) and magnetic-field data from the Magnetometer (MAG) instruments on board Solar Orbiter during its first orbit. This allows us to evaluate the angular momentum in the protons in addition to that stored in magnetic-field stresses, and compare these to previous observations from other spacecraft. We discuss the statistical properties of the angular-momentum flux and its dependence on solar-wind properties. </p><p>Our results largely agree with previous measurements of the solar wind’s angular-momentum flux in the inner heliosphere and demonstrate the potential for future detailed studies of large-scale properties of the solar wind with the data from Solar Orbiter.</p>

scholarly journals Solar wind, mass and momentum losses during the solar cycle

2010 ◽  
Vol 6 (S271) ◽  
pp. 395-396
Author(s):  
R. Pinto ◽  
S. Brun ◽  
L. Jouve ◽  
R. Grappin
Keyword(s):  
Solar Wind ◽  
Solar Cycle ◽  
Wind Speed ◽  
Mass Flux ◽  
Solar Minimum ◽  
Momentum Flux ◽  
Loss Rate ◽  
Convection Zone ◽  
Mass Loss Rate ◽  
Good Agreement

AbstractWe study the connections between the sun's convection zone evolution and the dynamics of the solar wind and corona. We input the magnetic fields generated by a 2.5D axisymmetric kinematic dynamo code (STELEM) into a 2.5D axisymmetric coronal MHD code (DIP). The computations were carried out for an 11 year cycle. We show that the solar wind's velocity and mass flux vary in latitude and in time in good agreement with the well known time-latitude assymptotic wind speed diagram. Overall sun's mass loss rate, momentum flux and magnetic breaking torque are maximal near the solar minimum.

Momentum flux invariance and solar wind sources

Solar Physics ◽  
1983 ◽  
Vol 83 (2) ◽  
pp. 379-384 ◽  
Author(s):  
Raphael Steinitz
Keyword(s):  
Solar Wind ◽  
Momentum Flux ◽  
Solar Wind Sources

Energy and momentum flux around comet 67P throughout the Rosetta mission

2020 ◽  
Author(s):  
Hans Nilsson ◽  
Hayley Williamson ◽  
Gabriella Stenberg Wieser ◽  
Ingo Richter ◽  
Charlotte Götz
Keyword(s):  
Solar Wind ◽  
Energy Flux ◽  
Momentum Flux ◽  
Population Based ◽  
Ion Fluxes ◽  
Relative Contribution ◽  
Rosetta Mission ◽  
Order Of Magnitude ◽  
Energy And Momentum ◽  
Comet 67P

<p>We calculate the momentum and energy flux of ions measured by the Ion Composition Analyzer (ICA) on the Rosetta mission at comet 67P/Churyumov-Gerasimenko. We find that the total ion energy and momentum flux stay roughly constant over the mission, but the relative contribution of solar wind ions and cometary ions changes drastically depending on the spacecraft position in the ionosphere and distance from the comet to the sun. We also see that the magnetic pressure, calculated from the magnetic field measured by the Rosetta magnetometer, is on the order of the total ion momentum flux and roughly corresponds with the cometary ion momentum flux. Near both the beginning and end of the mission, solar wind momentum and energy flux are roughly two orders of magnitude larger than the corresponding heavy cometary ion fluxes. When the spacecraft enters the solar wind ion cavity near the comet’s periapsis, the solar wind energy and momentum flux drop drastically, mainly due to reduced density. Meanwhile, the cometary energy flux increases to be roughly equal to the solar wind flux earlier in the mission and the cometary momentum flux as measured by ICA becomes roughly an order of magnitude higher than previous and later solar wind fluxes. We also examine the changes in flux on two excursions, one on the dayside and one on the nightside of the comet, and see that during the nightside excursion, the cometary ion fluxes drop off roughly with the square of the distance from the comet. During the dayside excursion the flux was approximately constant, indicating that the excursion distance was small compared to the region where the observed ions were produced. ICA does not measure the lowest energy ions, so we also discuss the energy and momentum of the full ion population based on density estimates from the LAP and MIP instruments.</p>

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