Search academic texts

Registration Number

0206U009328, 0103U002154 , R & D reports

Title

Solar evolution proccess investigation

popup.stage_title

Head

Stepanyan N.N.,

Registration Date

03-01-2007

Organization

Scientific-research institute "Crimean astrophysical observatory"

Description

Monitoring of the Sun of six kinds was carried out. · Magnetic tubes with kilogauss intensity are observed not only in active but also in quiet regions on the Sun. · Absorption of shock waves is not a determining mechanism of heating of the atmosphere. · Magnetic field structure near coronal holes boundaries is very steady and it prevents from interaction of new magnetic flux with magnetic field outside CH. · The rotation of solar structures is determined by subphotospheric sources of certain structures but not by the rotation of plasma of the quiet Sun. · Three-dimensional simulation of propagation of acoustic waves from point sources in subphotospheric layer has shown that wave amplitude from surficial sources increases in the spot but from deep sources it changes slightly. · In the solar activity cycles №№ 20 - 22 rotation period of the Sun in accordance with observations of general magnetic field Р = 26.96(3) days, in the cycle №23 Р= 26.58(5) days. · There is a steady periodicy 159.9657(4)~minin fluctuations of radial velocity of solar photosphere. It maintains the phase during 32-year interval. · In a flare region magnetic field changes its sign with depth. · There are significant errors during magnetic fields measurements with MDI SOHO in regions of intensive photospheric motions. · Peculiarities of flares glow at different levels of corona are found. · A number of short-duration impulsive flares occur 1-2 years before maximum and 2 years after it. · In fluctuations of photosphere of the Sun as a whole, observed at CrAO in 1974-2005 there is a steady periodicy 159.9657(4) min., which was keeping phase for 32 years. · In the spot region the lithium abundance is estimated within the range 2.0·10-11 - 2.5·10-11 , that is 1.5-2.0 times higher than the definitions of other authors.

Product Description

popup.authors