SWG3: The Bz Challenge

Purpose

To overcome roadblocks in the path to full capability for predicting Bz and other solar-wind properties at the Earth

Objectives

  • Predict strength and direction of IMF, solar wind velocity and density, and transient arrival time at L1
  • Characterize evolution and quantify properties of transients (CMEs/CIRs) propagating through the solar wind
  • Quantify velocity, magnetic field and plasma properties of dynamic coronal structures
  • Quantify global coronal magnetic field and predict likelihood of eruptions and/or sector structure affecting the Earth
  • Determine accuracy and characteristics of solar wind and IMF needed for useful prediction at Earth, and implications back down the chain to the Sun.

Research Highlight

Observations of a pseudostreamer

Observations of a pseudostreamer with a magnetic null and non-radial magnetic expansion. Panels a) and b) show extreme ultraviolet images taken by the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory (SDO/AIA). The pseudostreamer is apparent as the dark dome in Panel a) with characteristic quadrupolar substructure visible in Panel b). Panel c) shows CoMP observations of the fraction of linearly-polarized light, in which the intersection of the two dark lobes identifies the location of a coronal magnetic null (we have marked this position with the yellow star). Panel d) shows CoMP linear polarization direction both via the green arrows, and through the red/blue color scale indicating radial (black), clockwise-tilting (blue) and counterclockwise-tilting (red).

 

Relevant Publications

Magnetic nulls and super-radial expansion in the solor corona

Members

Project Scientist III
Senior Scientist and Section Head
Scientific Visitor
Senior Research Associate
Senior Research Associate
Senior Scientist
Postdoctoral Fellow II
Associate Scientist III
Postdoctoral Fellow
Senior Scientist and Section Head
Visitor
Project Scientist III
Project Scientist IV