Solar Wind Plasma Particles Organized by the Flow Speed
-
Published:2020-11
Issue:11
Volume:295
Page:
-
ISSN:0038-0938
-
Container-title:Solar Physics
-
language:en
-
Short-container-title:Sol Phys
Author:
Pierrard VivianeORCID, Lazar MarianORCID, Štverák Stepan
Abstract
AbstractRecent reports of the first data from Parker Solar Probe (PSP) have pointed to a series of links, correlations or anti-correlations between the solar wind bulk speed ($V_{\mathrm{SW}}$
V
SW
) and physical properties of plasma particles from less than 0.25 AU in the corona. In the present paper, we describe corresponding and additional links of solar wind properties, at 0.4 AU and 1.0 AU, in an attempt to complement the PSP data and understand their evolution. A detailed analysis is carried out for the main electron populations, comparing the low-energy (thermal) core and the collisionless suprathermal halo. We show that the anti-correlation observed at 0.4 AU between $V_{\mathrm{SW}}$
V
SW
and the number density (average value) is maintained also at 1 AU for both the core and halo electrons. On the contrary, only the core electrons manifest a clear anti-correlation of the temperature with $V_{\mathrm{SW}}$
V
SW
, while the halo temperature does not vary much. We also describe the ions, protons and helium, which have a more reduced mobility and their properties exhibit different variations with the solar wind speed. The results are used to shed more light on the mechanisms leading to a differential acceleration of these species and the origin of slow and fast wind modulation.
Funder
FWO Institut Franco-Allemand de Recherches de Saint-Louis
Publisher
Springer Science and Business Media LLC
Subject
Space and Planetary Science,Astronomy and Astrophysics
Reference49 articles.
1. Berčič, L., Maksimović, M., Landi, S., Matteini, L.: 2019, Scattering of strahl electrons in the solar wind between 0.3 and 1 au: Helios observations. Mon. Not. Roy. Astron. Soc. 486, 3404. DOI. 2. Berčič, L., Larson, D., Whittlesey, P., Maksimović, M., Badman, S.T., Landi, S., Matteini, L., Bale, S.D., Bonnell, J.W., Case, A.W., de Wit, T.D., Goetz, K., Harvey, P.R., Kasper, J.C., Korreck, K.E., Livi, R., MacDowall, R.J., Malaspina, D.M., Pulupa, M., Stevens, M.L.: 2020, Coronal electron temperature inferred from the strahl electrons in the inner heliosphere: Parker solar probe and Helios observations. Astrophys. J. 892, 88. DOI. 3. Burlaga, L.F., Ogilvie, K.W.: 1970, Heating of the solar wind. Astrophys. J. 159, 659. DOI. 4. Burlaga, L.F., Ogilvie, K.W.: 1973, Solar wind temperature and speed. J. Geophys. Res. 78, 2028. DOI. 5. Domingo, V.: 2002, SOHO, Yohkoh, Ulysses and Trace: the four solar missions in perspective, and available resources. Astrophys. Space Sci. 282, 171. DOI.
Cited by
11 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|