Victor Herrero Radio Astronomy Blog: October 2015

Friday, October 16, 2015

Sun Earth Jupiter 20151016

Many thanks to: STEREO and WIND Teams, Taxpayers of France, French Air Force, Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory, Prof. Dr. Kazumasa Imai Kochi National College of Technology Kochi Japan, Trinity College Dublin Ireland Astrophysics Group, United States NOAA SWPC, NASA Solar Dynamics Observatory Teams, Lockheed Martin Solar Laboratory ...

Links to earlier posts by month:

http://herrero-radio-astronomy.blogspot.com/2015/08/links-to-monthly-sun-earth-jupiter-posts.html?m=1

.Sun Earth Jupiter.

Thursday, October 8, 2015

About the evolution of the Sun active regions

As the days go by, I frequently show details of active region magnetograms images and charts, and other data, for active regions I think may be suspect of initiating the radio events we study.

I started studying solar radio emission in 1966, I am not finished yet :)

The degree of activity frequently varies much from day to day and is a complex subject studied for many decades.

Lidia van Driel-Gesztelyi and Lucie May Green have published last month a "Living Review of Solar Physics" titled:

"Evolution of Active Regions" , 98 pages, including 17 pages of references, free to download at:

http://solarphysics.livingreviews.org/Articles/lrsp-2015-1/

http://solarphysics.livingreviews.org/Articles/lrsp-2015-1/download/lrsp-2015-1Color.pdf

Section 6 studies the case of AR 7978, "...subjected to the most comprehensive analysis of any AR..." as it evolved over a 6 month period.

Appendix A is a very good summary of Sunspot classifications, including the McIntosh and Hale methods.

I leave you repeating their quote from a poem by Laszlo Detre :

“ A Solar Physicist’s Lament ....

It looks as if many a sunny day
Will pass along on its way
Before we solve it all... "