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Solar wind outflow and the chromospheric magnetic network

Hassler1, Dammasch, Lemaire

  • 1Southwest Research Institute, 1050 Walnut Street, Boulder, CO 80302, USA. Max-Planck-Institut fur Aeronomie, D-37191 Katlenburg-Lindau, Germany. Institut d'Astrophysique Spatiale, Unite Mixte CNRS- Universite Paris XI, 91405 Orsay, France. Ins.

Science (New York, N.Y.)
|February 5, 1999
PubMed
Summary

Solar wind originates from specific regions in coronal holes, linked to the chromospheric magnetic network. These findings improve understanding of the solar wind

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Area of Science:

  • Solar Physics
  • Heliophysics
  • Plasma Physics

Background:

  • Coronal holes are regions of open magnetic field lines in the Sun's corona.
  • Understanding the solar wind's origin is crucial for space weather prediction.
  • Previous observations lacked detailed velocity mapping at the coronal base.

Purpose of the Study:

  • To investigate the relationship between outflow velocities and magnetic structures at the base of the corona.
  • To identify the specific source regions of the solar wind.
  • To enhance the understanding of coronal dynamics.

Main Methods:

  • Utilized the Solar and Heliospheric Observatory (SOHO) spacecraft.
  • Created velocity maps of Ne7+ using its resonance line at 770 angstroms.

Related Experiment Videos

  • Correlated outflow velocities with chromospheric magnetic network structure.

    • Main Results:

    • Outflow velocities in coronal holes show a clear relationship with the chromospheric magnetic network.
    • Solar wind appears to originate from localized regions along boundaries and intersections of magnetic network cells.
    • Large outflow velocity signatures were observed, linked to this network structure.

    Conclusions:

    • The solar wind is rooted in the chromospheric magnetic network at the coronal base.
    • Localized regions along magnetic network boundaries are key source areas for the solar wind.
    • These findings provide new insights into the dynamics of the solar wind's origin.