On the relation between coronal heating, flux tube divergence, and the solar wind proton flux and flow speed

1994 ◽  
Vol 436 ◽  
pp. 390 ◽  
Author(s):  
Onulf Sandbaek ◽  
Egil Leer ◽  
Viggo H. Hansteen
Keyword(s):  
Solar Wind ◽  
Flux Tube ◽  
Flow Speed ◽  
Coronal Heating ◽  
Proton Flux ◽  
Solar Wind Proton

Solar wind proton flux extremes and their association with pseudostreamers

2013 ◽  
Author(s):  
Liang Zhao ◽  
Sarah E. Gibson ◽  
Lennard A. Fisk
Keyword(s):  
Solar Wind ◽  
Proton Flux ◽  
Solar Wind Proton

Observation of Dust Generated Hydrogen in the Solar Vicinity

1980 ◽  
Vol 91 ◽  
pp. 155-158
Author(s):  
H. J. Fahr ◽  
H. W. Ripken ◽  
G. Lay
Keyword(s):  
Solar Wind ◽  
Neutral Hydrogen ◽  
Interplanetary Dust ◽  
Proton Flux ◽  
Zodiacal Light ◽  
Solar Wind Proton ◽  
Density Profiles ◽  
Spectral Separation ◽  
Spectral Profiles ◽  
Dust Distribution

Solar wind protons impinging on interplanetary dust grains are trapped, deionized, and subsequently desorbed. The steady state distribution of desorbed neutral hydrogen inside of 0.4 AU can be deduced by observation of resonantly scattered solar 121.6 nm radiation. Calculated integral intensities and spectral profiles are given, showing the clear spectral separation of the different radiation components. Given a specific solar wind proton flux, the interplanetary dust distribution can be determined. Conversely, dust density profiles from zodiacal light measurements can be used to deduce solar wind proton fluxes at heliocentric distances of 0.4 to 0.15 AU. Observations of latitudinal and short-term temporal proton flux variations seem feasible.

scholarly journals Long-Term Independence of Solar Wind Polytropic Index on Plasma Flow Speed

Entropy ◽  
2018 ◽  
Vol 20 (10) ◽  
pp. 799 ◽  
Author(s):  
George Livadiotis
Keyword(s):  
Solar Wind ◽  
Plasma Flow ◽  
Solar Wind Speed ◽  
Solar Wind Plasma ◽  
Flow Speed ◽  
Polytropic Index ◽  
Solar Cycles ◽  
Solar Wind Proton ◽  
Plasma Flow Speed

The paper derives the polytropic indices over the last two solar cycles (years 1995–2017) for the solar wind proton plasma near Earth (~1 AU). We use ~92-s datasets of proton plasma moments (speed, density, and temperature), measured from the Solar Wind Experiment instrument onboard Wind spacecraft, to estimate the moving averages of the polytropic index, as well as their weighted means and standard errors as a function of the solar wind speed and the year of measurements. The derived long-term behavior of the polytropic index agrees with the results of other previous methods. In particular, we find that the polytropic index remains quasi-constant with respect to the plasma flow speed, in agreement with earlier analyses of solar wind plasma. It is shown that most of the fluctuations of the polytropic index appear in the fast solar wind. The polytropic index remains quasi-constant, despite the frequent entropic variations. Therefore, on an annual basis, the polytropic index of the solar wind proton plasma near ~1 AU can be considered independent of the plasma flow speed. The estimated all-year weighted mean and its standard error is γ = 1.86 ± 0.09.

scholarly journals Association of solar wind proton flux extremes with pseudostreamers

2013 ◽  
Vol 118 (6) ◽  
pp. 2834-2841 ◽  
Author(s):  
L. Zhao ◽  
S. E. Gibson ◽  
L. A. Fisk
Keyword(s):  
Solar Wind ◽  
Proton Flux ◽  
Solar Wind Proton

scholarly journals The heliospheric magnetic flux, solar wind proton flux, and cosmic ray intensity during the coming solar minimum

Space Weather ◽  
2014 ◽  
Vol 12 (7) ◽  
pp. 499-507 ◽  
Author(s):  
Charles W. Smith ◽  
K. G. McCracken ◽  
Nathan A. Schwadron ◽  
Molly L. Goelzer
Keyword(s):  
Solar Wind ◽  
Magnetic Flux ◽  
Solar Minimum ◽  
Cosmic Ray ◽  
Proton Flux ◽  
Solar Wind Proton ◽  
Cosmic Ray Intensity

scholarly journals ARTEMIS Observations of Solar Wind Proton Scattering off the Lunar Surface

2018 ◽  
Vol 123 (7) ◽  
pp. 5289-5299 ◽  
Author(s):  
C. Lue ◽  
J. S. Halekas ◽  
A. R. Poppe ◽  
J. P. McFadden
Keyword(s):  
Solar Wind ◽  
Lunar Surface ◽  
Proton Scattering ◽  
Solar Wind Proton
Sign in / Sign up

Export Citation Format

Share Document