corona | High Altitude Observatory

New Book! The Problem of Coronal Heating: A Rosetta Stone for Electrodynamic Coupling in Cosmic Plasmas

Cover of Phil Judge's book, The Problem of Coronal Heating

HAO flew observers to MLSO to observe the Sun during the solar eclipse

UCoMP image from April 9th, 2024.

A Comprehensive Radiative Magnetohydrodynamics Simulation of Active Region Scale Flux Emergence from the Convection Zone to the Corona

Coronal dimming

Thermal and Non-thermal Properties of Active Region Recurrent Coronal Jets Publication Name

Two rows of colorful squares, 8 total, showing coronal geyser jet action

Study of Coronal Hole Lifetimes

Coronal hole centroid latitude vs. Carrington Rotation

Efficient and Automated Inversions of Magnetically-Sensitive Forbidden Coronal Lines: CLEDB - The Coronal Line Emission DataBase Magnetic Field Inversion Algorithm

CLEDB 2-line magnetic inversion algorithm flowchart. An important aspect is the delivery of multiple possible solutions for each observation at the last step. Note that the x-coordinate of the point in space, as well as nearest electron density, are returned along with B. The figure uses the notation Vobs and Vdb for observed and computed values of the amplitudes of the Stokes parameters corresponding to O3 and S3 (B = 1) in the text.

The Coronal Veil

3D view of the simulated corona; bottom panel: magnetogram; back panel: synthetic AIA 211A coronal image; middle vertical plane: volumetric emissivity. Field lines are included for reference.

A Spectroscopic Survey of Infrared 1–4 μm Spectra in Regions of Prominent Solar Coronal Emission Lines of Fe XIII, Si X, and Si IX

Fe XIII 1074.68 nm emission over atmospheric absorption (normalized) in the He I Cryo-NIRSP wavelength range with all labeled candidate lines.

A New Coronagraph for Mauna Loa

Electrical engineer, Brandon Larson, and Technician Rob Graves install the K-cor center section onto the solar spar at the NCAR Mesa Lab in Boulder

Thermal Properties of Coronal Cavities

Average temperature of 35 cavities (black) and their surrounding streamers (red)

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