CaK Sun (20101111)
發表於 :
2010-11-21, 00:15由 David
A very lazy low magnification shot of the sun with Lunt Calcium K module on APM 80/480 refractor with DMK41 camera. Despite the fact that it is a routine shot, the sun still reveals its ever-changing beauty.
In a CaK shot, the dark spots are sunspots. The picture can be viewed as a map of magnetic field strength, with the lighter areas being region of stronger magnetic field.
Re: CaK Sun (20101111)
發表於 :
2010-11-21, 11:05由 社長
usually how long it takes for visible changes on the surface, if I want to create animation of this image scale?
Re: CaK Sun (20101111)
發表於 :
2010-11-21, 13:52由 Lewis
社長 寫:usually how long it takes for visible changes on the surface, if I want to create animation of this image scale?
Interesting, I also want to know. Normally, the sunspot can stand for about two weeks.
I found one animation in youtube.
http://www.youtube.com/watch?v=T0alRDff8Do&feature=relatedIt seems that you can take an animation at South/North pole.
Re: CaK Sun (20101111)
發表於 :
2010-11-21, 13:57由 universe24
Any references about your quote that "map of magnetic field strength"? Interested to know more...
What I understand so far is CaK feature very sensitive to temperature changes...
Re: CaK Sun (20101111)
發表於 :
2010-11-21, 15:35由 David
universe24 寫:Any references about your quote that "map of magnetic field strength"? Interested to know more...
What I understand so far is CaK feature very sensitive to temperature changes...
I am no expert in solar research, of course. I would be interested to know more as well. Here is a reference:
http://solar.physics.montana.edu/YPOP/C ... lcium.html