Yuhong Fan

The eruption of a prominence carrying coronal flux rope forward synthesis of the magnetic field strength measurement by COSMOS

(a) The inferred line-of-sight (LOS) magnetic field B_LOS obtained from the forward synthesis of the circular polarization signal from the MHD model data at a time during the quasi-static phase of the flux rope; (b) The same as (a) but only show the pixels of the measured B_LOS with sufficient signal to noise ratio; (c) The axial field strength in the mid cross-section of the flux rope; (d) The 3D field lines of the coronal magnetic field as view
Tuesday, November 13, 2018

From a magnetohydrodynamic (MHD) simulation of the eruption of a prominence hosting coronal flux rope, Yuhong Fan and others carry out forward synthesis of the circular polarization signal (Stokes V signal) of the FeXIII emission line at 1074.7 nm produced by the MHD model.

MHD simulation of prominence eruption

A 3D MHD simulation of the eruption of a prominence-carrying coronal flux rope
Monday, August 6, 2018

Yuhong Fan and others carry out magnetohydrodynamic (MHD) simulations of the quasi-static evolution and eruption of a twisted coronal flux rope under a coronal streamer built up by an imposed flux emergence at the lower boundary.

MHD Simulations of the Eruption of Coronal Flux Ropes under Coronal Streamers

MHD simulations
Thursday, July 20, 2017

Using three-dimensional magnetohydrodynamic (MHD) simulations, we investigate the eruption of coronal flux ropes underlying coronal streamers and the development of a prominence eruption.

CME Initiation, Evolution, and Interplanetary Consequences

HAO scientists have carried out 3D isothermal MHD simulations of the evolution of the large scale coronal magnetic field as a twisted magnetic flux tube is driven (slowly) through the lower boundary into a pre-existing coronal arcade field.

Yuhong Fan

Dr. Yuhong Fan is a Senior Scientist in the High Altitude Observatory at the National Center for Atmospheric Research specializing in solar magneto-hydrodynamics; solar dynamo and the emergence of solar active regions.

Differential Rotation in solar convective dynamo simulations

3D views of iso-surfaces
Monday, February 22, 2016

Fan and Fang's recent publication shows significant advances in global-scale fully dynamic 3D convective dynamo simulations of the solar convective envelope. These simulations demonstrate the role magnetic field plays in the self-consistent maintenance of the solar differential rotation.

A new Solar Superstorms documentary

NCSA Press Release–Several scientists from HAO at NCAR, including Yuhong Fan, Mark Miesch, Nick Nelson, and Matthias Rem

Analyses of solar coronal prominence cavities

Composite image
Tuesday, October 16, 2012

Analyses of solar coronal prominence cavities by an international group of scientists including HAO's Sarah Gibson, Christian Bethge, Giuliana de Toma, Yuhong Fan, HAO visitor Urszula Bak Steslicka and University of Colorado graduate student Don Schmit, has been profiled in a

HAO Colloquium Series presents Yuhong Fan, HAO

NO WEBCAST OR RECORDING WILL BE AVAILABLE

A simulation of solar convective dynamo: self-consistent maintenance of the solar differential rotation and emerging flux

MHD Simulation of Flux Tube

A simulation with the FSAM code of the buoyant rise of an initially untwisted, uniformly buoyant toroidal flux tube.

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