Related Experiment Video
Updated: Nov 8, 2025
06:42
Magnetically Induced Rotating Rayleigh-Taylor Instability
Published on: March 3, 2017
9.8K
EVIDENCE FOR THE MAGNETIC BREAKOUT MODEL IN AN EQUATORIAL CORONAL-HOLE JET
Pankaj Kumar1, Judith T Karpen1, Spiro K Antiochos1
1Heliophysics Science Division, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USA.
The Astrophysical Journal
|April 19, 2021
Summary
Solar coronal jets, often seen in coronal holes, are part of a spectrum of solar eruptions. This study supports the breakout jet model as a mechanism for these events across various scales.
Area of Science:
- Solar physics
- Plasma astrophysics
- Magnetohydrodynamics
Background:
- Small, impulsive jets are common in the solar corona, particularly in coronal holes.
- These jets are increasingly recognized as part of a continuum of solar eruptions, linking to larger events like coronal mass ejections and eruptive flares.
- Coronal hole jets provide a simplified magnetic environment ideal for testing eruption theories.
Purpose of the Study:
- To analyze an equatorial coronal hole jet event observed on January 9, 2014.
- To investigate the magnetic field structure and energy release mechanisms responsible for the jet.
- To test the applicability of the breakout jet model to solar eruptions.
Main Methods:
- Analysis of solar jet event using data from the Solar Dynamics Observatory (SDO)/Atmospheric Imaging Assembly (AIA).
- Magnetic field structure analysis using SDO/Helioseismic and Magnetic Imager (HMI) magnetograms.
- Modeling the event using the embedded-bipole topology and comparing observations with the breakout jet model predictions.
Main Results:
- The observed jet's magnetic field structure was consistent with a previously identified embedded-bipole topology.
- Footpoint motions in the minority-polarity region were observed, with negligible flux emergence or cancellation preceding the eruption.
- The event included a mini-filament, offering insights into energy storage and release.
Conclusions:
- The free energy powering the jet likely originated from magnetic shear within the embedded bipole.
- The observed activity sequence and interpretation strongly align with the breakout jet model.
- The breakout model is supported as an explanation for solar eruptions across a wide range of scales.
Related Concept Videos
01:19Magnetic Field Lines
4.8K
The representation of magnetic fields by magnetic field lines is very useful in visualizing the strength and direction of the magnetic field. Each of the magnetic field lines forms a closed loop. The field lines emerge from the north pole (N), loop around to the south pole (S), and continue through the bar magnet back to the north pole.
Magnetic field lines follow several hard-and-fast rules:
Magnetic field lines follow several hard-and-fast rules:
4.8K
01:28Magnetostatic Boundary Conditions
1.4K
An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
1.4K
01:26Divergence and Curl of Magnetic Field
3.6K
The magnetic field due to a volume current distribution given by the Biot–Savart Law can be expressed as follows:
3.6K
01:23Magnetic Field due to Moving Charges
10.7K
A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
10.7K
01:16Magnetic Field Of A Current Loop
5.7K
Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
5.7K
01:13Magnetic Force Between Two Parallel Currents
4.1K
Two long, straight, and parallel current-carrying conductors exert a force of equal magnitude on one another. The direction of the force depends on the current direction in the conductors.
The force exerted by the magnetic field due to the first conductor over a finite length of the second conductor is given as the product of the current in the second conductor and the vector product of the length vector along the current element and the field due to the first conductor. According to the...
The force exerted by the magnetic field due to the first conductor over a finite length of the second conductor is given as the product of the current in the second conductor and the vector product of the length vector along the current element and the field due to the first conductor. According to the...
4.1K