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Connection Between Proton Beam and Alpha Core in the Solar Wind

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10423321" target="_blank" >RIV/00216208:11320/20:10423321 - isvavai.cz</a>

  • Result on the web

    <a href="https://www.mff.cuni.cz/veda/konference/wds/proc/pdf20/WDS20_01_f2_Durovcova.pdf" target="_blank" >https://www.mff.cuni.cz/veda/konference/wds/proc/pdf20/WDS20_01_f2_Durovcova.pdf</a>

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Connection Between Proton Beam and Alpha Core in the Solar Wind

  • Original language description

    Using the plasma data measured in-situ in the inner heliosphere (Helios 1 and 2), we focus on the proton beam development with an increasing radial distance from the Sun as well as on the connection between the proton beam parameters and the α core properties. We found that the relative content of α core is correlated with the relative proton beam abundance, and this effect is more pronounced in the fast solar wind streams during solar maximum. Since the fast wind is expected to come from distinct source regions, coronal holes, the connection between the α core and proton beam could indicate that the coronal holes are able to produce different types of the fast solar wind streams. On the other hand, in the collisionally old slow solar wind, merging of the proton beam with core is observed. In the parameter space of the α-proton core relative drift and the relative proton beam abundance, we distinguished two regimes and observed transition between them for the intermediate streams. We proposed two different scenarios of how the proton beam could be reduced. First, the protons in the intermediate streams could be heated via the alpha/proton magnetosonic instability and initiate the proton core and beam merging. Second, the proton beam could be reduced in order to balance the total ion momentum in the solar wind frame.

  • Czech name

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

  • OECD FORD branch

    10305 - Fluids and plasma physics (including surface physics)

Result continuities

  • Project

  • Continuities

    S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2020

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Article name in the collection

    WDS&apos;20 Proceedings of Contributed Papers — Physics

  • ISBN

    978-80-7378-435-5

  • ISSN

  • e-ISSN

  • Number of pages

    7

  • Pages from-to

    7-13

  • Publisher name

    Matfyzpress

  • Place of publication

    Praha

  • Event location

    Praha/ZOOM

  • Event date

    Sep 22, 2020

  • Type of event by nationality

    EUR - Evropská akce

  • UT code for WoS article