The energy balance in the solar wind formation region

1
The energy balance in the solar wind formation
region

• S.I.Molodykh
• Institute of Solar-Terrestrial Physics SB PAS,
  664033, Russia, Irkutsk, p/b 4026,
• Email sim_at_iszf.irk.ru

2
The main topics

• To carry out the analysis of energetic
  balanse of solar wind in formation region on the
  basis of observation data
• Dependence of electron density, nonthermal
  velocity and temperature from heliolatitude at
  heliocentric distance 1.02Ro
• Dependence of electron density from heliocentric
  distance in two regions of the solar corona with
  an essentially different flow geometry (in quiet
  region and coronal hole).

3
(No Transcript)
4
(No Transcript)
5
(No Transcript)
6
(No Transcript)
7
(No Transcript)
8
(No Transcript)
9
(No Transcript)
10
Conclusion

• It is shown that the energy flux, required
  for solar wind formation, enters the solar corona
  in the form of Alfven waves whose dissipation
  provides the heating of the solar wind plasma
  near the Sun. Their transformation to acoustic
  waves in this region is less effective than the
  dissipation.
• With distance from the Sun the dissipation
  of the Alfven waves falls off, and the heating of
  the solar wind plasma is determined by the
  coefficient of Alfven wave transformation to
  acoustic waves.
• Subsequently, the dissipation effectiveness
  of the acoustic waves decreases, and as soon as
  the absorption coefficient of acoustic waves
  becomes less than the transformation coefficient
  of the Alfven waves to acoustic waves, plasma
  heating is now determined by the absorption
  coefficient of acoustic waves.