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Analysis of Intensity Ratio for MgXII Lyα Components from Intercosmos 7 Observations

Published online by Cambridge University Press:  12 April 2016

J. Sylwester ,
B. Sylwester ,
J. Jakimiec ,
M. Tomczak ,
S.L. Mandelstam ,
I.A. Zhitnik  and
V.V. Korneev
J. Sylwester
Affiliation:
Space Research Center Polish Academy of Sciences
B. Sylwester
Affiliation:
Space Research Center Polish Academy of Sciences
J. Jakimiec
Affiliation:
Wroclaw University, Poland
M. Tomczak
Affiliation:
Wroclaw University, Poland
S.L. Mandelstam
Affiliation:
P.N. Lebedev Phys. Institute Moscow
I.A. Zhitnik
Affiliation:
P.N. Lebedev Phys. Institute Moscow
V.V. Korneev
Affiliation:
P.N. Lebedev Phys. Institute Moscow

Extract

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We discuss the Mg XII Lyα line profile measurements obtained, by means of Bragg crystal spectrometer aboard INTERCOSMOS 7 satellite. The design of this spectrometer allows to clearly resolve both components α½ and α3/2) of the Lyα spin doublet. The intensities of each of these components we derived by means of fitting two Voigt profiles to the measured Mg XII Lyα shape. More than 100 spectra were analyzed in this way providing the statistical information on the value of intensity ratio . Derived average value of a is close to the theoretically expected 0.5, but in many cases the value of a is significantly different from 0.5 (both lower and higher values occur). We present examples of the fit and the histograms showing correlations of a value with the values of other flare parameters. Present analysis consist the observational part of the larger paper under the preparation with Prof. R.W.P. McWhirter theoretical group.

Type
Session 6. Poster Papers
Information
International Astronomical Union Colloquium , Volume 86: Eighth International Colloquium on Ultraviolet and X-ray Spectroscopy of Astrophysical and Laboratory Plasmas , 1984 , pp. 154
Copyright
Copyright © Naval Research Laboratory 1984. Publication courtesy of the Naval Research Laboratory, Washington, DC.