The Solar Wind.pdf
The Solar Wind.pdf The Solar Wind.pdf
• Waves and turbulence?– One possibility is that the corona is heated by compressionalwaves at or just below the surface. Oscillatory motion of theSun’s surface could drive pressure waves. In theory fastmode waves could propagate up to 20R Sun . Experimentsdesigned to detect sound waves propagating into the coronahave not detected them.• Impulsive energy release?– The Sun has a magnetic field that contains magnetic energy.Magnetic energy can be converted into thermal energy. Thisis done by reconnection. The granularity of the photosphereas the top of the convection zone is caused by bubbles risingand falling. These might reconnect. X-ray bursts may beevidence of this happening.• We still don’t know how the corona is heated!
• Motion of granules and magnetic structures –Hinode observations
- Page 1 and 2: ESS 200CLectures 6 and 7The Solar W
- Page 3 and 4: • Solar wind speeds (heavy lines)
- Page 5 and 6: • It is useful to describe the so
- Page 8 and 9: • The transition from subsonic to
- Page 10 and 11: • For the solar wind to continue
- Page 15: • In summary the outer layer of t
- Page 19: ω > Sunv ϕϕSun r r- At large dis
- Page 22: • A meridian view of the IMF- The
- Page 26 and 27: • Observations of high speed stre
- Page 28: • Time series of parameters assoc
- Page 31 and 32: • Plasma measurementsshow a drama
- Page 33 and 34: • A coronal mass ejection in spac
- Page 35 and 36: • The magnetic field configuratio
- Page 37 and 38: •The solar wind forms abubble, ca
- Page 39: • The Voyager passage through the
• Waves and turbulence?– One possibility is that the corona is heated by compressionalwaves at or just below the surface. Oscillatory motion of theSun’s surface could drive pressure waves. In theory fastmode waves could propagate up to 20R Sun . Experimentsdesigned to detect sound waves propagating into the coronahave not detected them.• Impulsive energy release?– <strong>The</strong> Sun has a magnetic field that contains magnetic energy.Magnetic energy can be converted into thermal energy. Thisis done by reconnection. <strong>The</strong> granularity of the photosphereas the top of the convection zone is caused by bubbles risingand falling. <strong>The</strong>se might reconnect. X-ray bursts may beevidence of this happening.• We still don’t know how the corona is heated!
Change language