After almost 8 decades, astronomers still debate the reasons why the Sun and sun-like stars must possess coronae. Philip Judge re-examines the problem and compares it to that of a detective trying to find the lead pipe or smoking gun at the scene of a murder.
Since 2017, HAO has provided scientific support and analysis for NASA's Global-scale Observations of the Limb and Disk (GOLD). This mission includes a ultraviolet imaging spectrograph that flies on a commercial communications satellite in geostationary orbit taking images of the Earth's thermosphere and ionosphere.
The author reviews why, after almost 8 decades, we still have a coronal heating problem.
In this study, we present a magnetic conguration of an erupting pseudostreamer observed on April 19, 2015 on the Southwest limb embedding a prominence cavity. The eruption resulted in a relatively wide CME with a round front and prominence core intersected by a sharp plume.
Specified Dynamics Whole Atmosphere Community Climate Model with thermosphere-ionosphere eXtension (SD-WACCMX) simulations are used to investigate the solar migrating semidiurnal tide (SW2) around September equinox at middle to high latitudes in the Northern Hemisphere.
View videos of past colloquia