Evidence of Magnetic Reconnection along Coronal Hole Boundaries

Details Evidence of Magnetic Reconnection along Coronal Hole Boundaries Evidence of Magnetic Reconnection along Coronal Hole Boundaries

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...603l..57m&link_type=abstract

The Astrophysical Journal, Volume 603, Issue 1, pp. L57-L59.

Astronomy and Astrophysics

Astronomy

22

Sun: Solar Wind, Sun: Corona, Sun: Transition Region

Scientific paper

The present study reveals for the first time the existence of bidirectional jets, which are a signature of magnetic reconnection, occurring along coronal hole boundaries. The Solar Ultraviolet Measurement of Emitted Radiation spectrometer observations obtained in the N IV 765.15 Å (1.3×105 K) and Ne VIII 770.42 Å (6×105 K) emission lines in an equatorial extension of a polar coronal hole, known as the ``Elephant's Trunk'' coronal hole, show small regions of a few arcseconds size with strong blue- and redshifted emission reaching Doppler shifts of up to 150 km s-1, i.e., bidirectional jets. The jets' number density along coronal hole boundaries was found to be about 4-5 times higher with respect to the quiet Sun.

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