The Magnetic Connectivity of Moss Regions

Details The Magnetic Connectivity of Moss Regions The Magnetic Connectivity of Moss Regions

Apr 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000soph..193..219z&link_type=abstract

Solar Physics, v. 193, Issue 1/2, p. 219-225 (2000).

Physics

2

Scientific paper

A novel emission feature resembling moss was first identified in high-resolution TRACE Feix/x 171 Å images by Berger et al. (1999). The moss emission is characterized by dynamic arc-second scale, bright elements surrounding dark inclusions in images of solar active regions. Patches of moss elements, called moss regions, have a scale of 20-30 Mm. Moss regions occur only above some of magnetic plages that underlie soft X-ray coronal loops. Using the potential field extrapolation of the photospheric magnetic field into the corona, we find that the magnetic field lines in moss-associated magnetic plages connect with adjacent plages with opposite polarity; however, all field lines from mossless plages end in surrounding `quiet regions'. This result is consistent with the idea that the TRACE moss is the emission from the upper transition region due to heating of low-lying plasma by field-aligned thermal conduction from overlying hot plasma (Berger et al., 1999).

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