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DEPARTMENT FOR SOLAR PHYSICS
The Department for Solar Physics was founded in 1958 and was
headed by Professor E. A. Gurtovenko. Since 1983
Professor R. I. Kostik, Corresponding Member
of the NAS of Ukraine, was at the head of the Department. Since 2003 the Department
is headed by Dr.Sci. N. G. Shchukina.
The Department staff members carry out observations at telescopes
with high level of automatization:
ATsU-5 with a double-pass monochromator; ATsU-26 with a 5-camera spectrograph; SEF-1 with equipment for absolute spectrophotometry.
Main goals: investigations of active solar formations (surges,
prominences, flares, etc.) and the quiet photosphere.
On the basis of observations and theoretical modelling new data have
been obtained about physical processes on the Sun.
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Some of the achievements are:
A structurally inhomogeneous model of a solar prominence was made.
3-D theoretical models were calculated and 3-D semiempirical models
were constructed for the solar envelope. A mechanism was proposed to explain the presence of emission lines
in the IR solar spectrum, and the theory of acoustic wave influence on
spectral line profiles was developed. A self-consistent system of oscillator strengths was constructed
for about 2000 lines of 49 chemical elements. It was shown from observations aboard the CORONAS spacecraft that
the amplitudes of 5-min brightness oscillations of the Sun decrease
with depth in the solar atmosphere (theoretical predictions gave the
inverse relation).
In 1998 the preprint of E. A. Gurtovenko and R. I. Kostik
"The system of solar oscillator strengths" was published
(Main Astronomical Observatory NAS Ukraine, Preprint MAO-98-3E, Kyiv,
1998, 63 p.).
We use observed central intensities and equivalent widths
of 1958 solar lines of 49 chemical elements between 3 000 A
and 10 000 A to derive the values of oscillator strengths
of these lines. The internal accuracy of oscillator strengths is
±0.07 dex. The heights of formation of these lines in the solar
atmosphere are calculated as well.
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THE STAFF OF THE DEPARTMENT FOR SOLAR PHYSICS:
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