Imaging of the He D3/Hβ Emission Ratio in Quiescent Solar Prominences

Details Imaging of the He D3/Hβ Emission Ratio in Quiescent Solar Prominences Imaging of the He D3/Hβ Emission Ratio in Quiescent Solar Prominences

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..368..321h&link_type=abstract

The Physics of Chromospheric Plasmas ASP Conference Series, Vol. 368, Proceedings of the conference held 9-13 October, 2006 at t

Physics

Scientific paper

Quiescent solar prominences have been observed simultaneously in profile-integrated He D3 and Hβ emission with the SST on La Palma. The two-dimensional ratio maps of the He D3 and Hβ intensities are used to study temporal variations of intrinsic prominence parameters. Sub-areas with substantial variation of the intensity distribution indicate the evolution of prominence structures. When the emission ratio remains unchanged, the evolving threads are of largely equal physical state. Other regions which show a temporal varying emission ratio indicate substancial evolution of the intrinsic physical conditions. We propose that distance variation between the threads affects different penetration of the EUV irradiation required for populating of the He triplet system.

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