Physical Properties of Chromospheric Structures in H-alpha and and CaII 854.2 nm

Details Physical Properties of Chromospheric Structures in H-alpha and and CaII 854.2 nm Physical Properties of Chromospheric Structures in H-alpha and and CaII 854.2 nm

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008espm...12.2.45b&link_type=abstract

"12th European Solar Physics Meeting, Freiburg, Germany, held September, 8-12, 2008. Online at http://espm.kis.uni-freiburg.de/,

Physics

Scientific paper

Comprehensive studies of chromospheric structures are the key to understanding their dynamics in different solar regimes and their contribution in heating of the solar atmosphere. High spatial and spectral resolution observations of a quiet chromospheric region were obtained with the Interferometric BIdimensional Spectrometer (IBIS) installed at the Dunn Solar Telescope (DST) of the National Solar Observatory (NSO) on Sacramento Peak, USA. Chromospheric fibrils that were observed simultaneously in the Balmer H? and CaII 854.2 nm line are analysed using the cloud model technique to derive numerical values for the standard cloud model parameters; optical thickness, source function, Dopplerwidth and Dopplershift for the two lines, enabling detailed comparison between these.

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