Spectroscopy of Solar Prominences Simultaneously From Space and Ground

Details Spectroscopy of Solar Prominences Simultaneously From Space and Ground Spectroscopy of Solar Prominences Simultaneously From Space and Ground

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003soph..217..133s&link_type=abstract

Solar Physics, v. 217, Issue 1, p. 133-155 (2003).

Physics

12

Scientific paper

We present a comprehensive set of spectral data from two quiescent solar prominences observed in parallel from space and ground: with the VTT, simultaneous two-dimensional imaging of Hβ4862 Å and Caii 8542 Å yields a constant ratio, indicating small spatial pressure variations over the prominence. With the Gregory, simultaneous spectra of Caii 8542 Å and Hei 10830 Å were taken, their widths yielding 8000 K 6×104 K, the levels k>8 appearing more and more overpopulated. The larger widths of the Lyman lines require high non-thermal broadening close to that of `hot' EUV lines. In contrast, the Heii emission is more related to the `cool' lines.

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