Sarah Gibson

Simulating the solar corona in the forbidden and permitted lines with forward modeling I: Saturated and unsaturated Hanle regimes

Graphic depicting Linear polarization azimuth
Thursday, October 3, 2019

The magnetic field in the corona is important for understanding solar activity. Linear polarization measurements inforbidden lines in the visible/IR provide information about coronal magnetic direction and topology.

Data-optimized coronal field model: 1. Proof of concept

Graphic depicting field-lines from a ground-truth flux-rope magnetic field model
Thursday, August 8, 2019

Deriving the strength and direction of the three-dimensional (3D) magnetic field in the solar atmosphere is fundamental for understanding its dynamics. Volume information on the magnetic field mostly relies on photospheric and/or chromospheric surface vector magnetic fields.

Solar Prominences: Theory and models (Fleshing out the magnetic skeleton)

Painting the dips of a magnetic skeleton results in sheet-like prominences
Friday, August 24, 2018

Magnetic fields suspend the relatively cool material of solar prominences in an otherwise hot corona. A comprehensive understanding of solar prominences ultimately requires complex and dynamic models, constrained and validated by observations spanning the solar atmosphere.

Solar physics from unconventional viewpoints

An overview of interesting vantage points, highlighting previous extra-Sun-Earth-line (extra-SEL) missions
Thursday, July 26, 2018

We explore new opportunities for solar physics that could be realized by future missions providing sustained observations from vantage points away from the Sun-Earth line.

Evolution of the Global Solar Magnetic Field over 4 Solar Cycles: Use of the McIntosh Archive

Butterfly-type plots of all of the McA data
Thursday, July 26, 2018

The McIntosh Archive consists of a set of hand-drawn solar Carrington maps created by Patrick McIntosh from 1964 to 2009. McIntosh used mainly H, He-I 10830Å and photospheric magnetic measurements from both ground-based and NASA satellite observations.

EOS & Space Weather Feature McIntosh Archive Project

The McIntosh Archive project gets double notice: it's the subject of a recent highlight by EOS spotlight, which profiles a feature article for the journal Space Weather by Webb et al.

Origins of the Ambient Solar Wind: Implication for Space Weather

Carrington rotation stack plots
Thursday, September 7, 2017

The Sun’s outer atmosphere is heated to temperatures of millions of degrees, and solar plasma flows out into interplanetary space at supersonic speeds. This paper reviews our current understanding of these interrelated problems: coronal heating and the acceleration of the ambient solar wind.

Frontiers eBook on Coronal Magnetometry now available for free download


Magnetism defines the complex and dynamic solar corona. It determines the magnetic loop structure that dominates images of the corona, and stores the energy necessary to drive coronal eruptive phenomena and flare explosions.

Magnetic Nulls and Super-radial Expansion in the Solar Corona

Coronal pseudostreamer magnetic topology
Monday, May 1, 2017

Magnetic fields in the sun's outer atmosphere, the corona, control both solar-wind acceleration and the dynamics of solar eruptions.


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