A small-scale H-alpha eruption in the north polar limb of the Sun observed by New Solar Telescope

Details A small-scale H-alpha eruption in the north polar limb of the Sun observed by New Solar Telescope A small-scale H-alpha eruption in the north polar limb of the Sun observed by New Solar Telescope

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010nspm.conf...73k&link_type=abstract

Proceedings of the 20th National Solar Physics Meeting, held 31 May - 4 June, 2010 in Papradno, Slovakia, p. 73-76

Physics

Scientific paper

The 1.6 m New Solar Telescope (NST) at Big Bear Solar Observatory (BBSO) is the recently constructed world's largest optical solar telescope on the ground. Up to date it has been partly operated, i.e., observations that have been made at Nasmyth focus only without adaptive optic (AO) system. The AO system is planned to be installed this summer. Using the NST, we have observed the north polar limb in H-alpha line center wavelength on 2009 August 26. A remarkable H-alpha eruption was observed from 18:20 UT to 18:45 UT with a relatively slower speed of about 10 km/s in its early stage. The eruption was then slightly accelerated up to 20-30 km/s and appeared to be deflected along the pre-existing magnetic field. The eruption also showed several interesting characteristics such as bifurcation, rotation, horizontal oscillation, and direction and thickness changes of its structure during its evolution. In this talk, we report on the observational properties of the small-scale eruption observed by the NST and discuss their implications for magnetic reconnection.

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