Rotation and X-Ray Emission from Protostars

Montmerle, Thierry, Nicolas Grosso, Yohko Tsuboi, and Katsuji Koyama, Rotation and X-Ray Emission from Protostars, ApJ, 532, 1097-1110 (2000) (ADS)

The cartoon

(click on the image for a larger version)

Not a solar flare cartoon, but one showing how rotation and magnetic activity may develop in a protostellar system. The sequence 1-5 shows a field line gets sheared by its line-tying at the accretion disk (shaded), eventually reconnecting. An accretion disk, with its large inertia and possibly flexible electrodynamics, offers theoretical developments beyond what the Sun can illustrate with its coronal field only tied to the tenuous gas of the photosphere.. Similarly one could have another star or a planet as the anchor point..

Date: 2010 September 03

Update: 2019 November 26