Indices for the epochs of the solar activity minima

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Solar Physics, Astrophysics, And Astronomy: Solar Activity Cycle (2162), Solar Physics, Astrophysics, And Astronomy: Magnetic Fields, Solar Physics, Astrophysics, And Astronomy: Solar Irradiance

Scientific paper

[1] New solar activity indices for the sunspot cycle minima were obtained from the Hα synoptic charts for 1887-2005, Ca II K observational data of the solar disk at Kodaikanal for 1907-1995. The Apz index determines the area of the polar zone occupied by the magnetic field of one polarity, and A(t) is the sum of squares of dipole and octupole magnetic moments. The L(t) index is the total length of magnetic neutral lines on the Hα synoptic chart, and K(t) characterizes the complexity of the topology pattern of the general magnetic field of the Sun. It is determined by the inverse number of crossings of neutral lines with the meridian net on the Hα chart. The R(t) index characterizes the correlation factor of the magnetic field polarities in the latitude zones +/-40o. The solar rotation index SSPD(t) is determined by the sum of the spectral density of the power of the magnetic field sector structures. The area of the Ca II K bright points at high latitudes is the S K (t) index. It has been shown that the 11-year cycles of Apz(t), A(t), L(t), K(t), R(t), SSPD(t), and S K (t) have maxima at the sunspot activity minimum and that they are ahead of the cycles of Wolf numbers, W(t), by 5-6 years.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Indices for the epochs of the solar activity minima does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Indices for the epochs of the solar activity minima, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Indices for the epochs of the solar activity minima will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-781637

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.