2D Observation of a Small Active Region in Hα

Details 2D Observation of a Small Active Region in Hα 2D Observation of a Small Active Region in Hα

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..368..119g&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

A small active region on the solar chromosphere was observed with high spatial and spectral resolution in Hα. The data were obtained with the Göttingen Fabry-Pérot Spectrometer mounted in the Vacuum Tower Telescope at the Observatorio del Teide in May 2002. Intensity and velocity maps for different line widths were derived over the two-dimensional field of view by applying the Lambdameter method. Some physical parameters like the source function, the line-of-sight velocity, the Doppler width, and the optical depth of fibril-like structures were determined using Beckers' cloud model. First results of this study are presented.

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