Solar chromospheric structures as observed simultaneously in strong UV lines. 1. Observations, statistical analysis and characteristic line profiles

Details Solar chromospheric structures as observed simultaneously in strong UV lines. 1. Observations, statistical analysis and characteristic line profiles Solar chromospheric structures as observed simultaneously in strong UV lines. 1. Observations, statistical analysis and characteristic line profiles

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...287..233b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 287, no. 1, p. 233-255

Astronomy and Astrophysics

Astronomy

6

Calcium, Chromosphere, Hydrogen, Magnesium, Stellar Models, Sun, Ultraviolet Astronomy, Ultraviolet Spectra, Correlation, Data Bases, Line Shape, Luminous Intensity, Lyman Alpha Radiation, Lyman Beta Radiation, Spectrometers, Statistical Analysis

Scientific paper

We present a set of high resolution profiles of H Lyman alpha and beta, Mg II h and k, Ca II H and K lines measured near the center of the solar disk and simultaneously above different solar chromospheric structures. The large data base provides a way of correlating different parameters in the different lines: correlations such as Lyman-alpha reversal vs intensity, Lyman-alpha vs Ca K are discussed. We notice that Mg II and Ca II have a similar behavior, different from Lyman-alpha and beta. We also discuss a classification derived from the distribution of integrated intensities in CA II K, from which average profiles (for cell, network, plage) are computed for the six lines and are compared with theoretical ones derived from several models.

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