Calcium+ (Also known as Calcium II in spectroscopic notation like in astronomy) exists in the atmosphere of the sun. For it to form in appreciable amounts, it must be very hot. For this reason, it is concentrated in the photosphere, allowing us to view features that are not visible in broadband or Ha.
Thank You!
Have you used the Lunt CaK filter to compare?
That's so cool! Do you think it would be possible to make a timelapse movie to show the currents/motion?
Good idea. I will try that when I get a chance.
what sort of chemistry is going on here?
Sorry, I don't know exactly either. I am not an expert on the chemistry of the sun.
Calcium+ (Also known as Calcium II in spectroscopic notation like in astronomy) exists in the atmosphere of the sun. For it to form in appreciable amounts, it must be very hot. For this reason, it is concentrated in the photosphere, allowing us to view features that are not visible in broadband or Ha.