Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...507..433l&link_type=abstract
The Astrophysical Journal, Volume 507, Issue 1, pp. 433-442.
Astronomy and Astrophysics
Astronomy
57
Sun: Magnetic Fields, Sun: X-Rays, Gamma Rays
Scientific paper
X-ray bright points are believed to result from the interaction of two small magnetic features of opposite polarity. As these features move apart, flux interconnecting them can become disconnected and joined to the overlying magnetic field. For features moving toward one another this process will occur in reverse. In either case this magnetic reconnection occurs at the separator field line. Assuming that reconnection can occur only after it is ``triggered,'' the process will heat the plasma nearby the separator, thereby giving rise to the X-ray brightening. This can be quantified using a recent model of current sheet formation and reconnection along separators. Application of this model predicts the heating from reconnection based on the observable magnetic quantities of flux, field strength, and polar separation. In addition, the model predicts morphological aspects of the bright points such as the apparent angle between the axes of the X-ray loop and the magnetic bipole.
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