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Old 23-06-2024, 09:21 PM
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Maurice
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Join Date: Jun 2006
Location: Melbourne
Posts: 496
Quote:
Originally Posted by John W View Post
Well done Maurice - lots of features to see. Good comparison with two wavelengths as well.
Regards, John W.

Thank you John.


Quote:
Originally Posted by foc View Post
Great detail in your images of the many filaments and prominences in Ha. Makes quite an attractive Souvenir of this busy solar month. Nice contrast in the Ca image for these deeper layers

Thanks Ross. It has been quite an active solar month.


Quote:
Originally Posted by morls View Post
Great images, really interesting.

I've got a very basic question about the Ca-K images...I can understand how the H-alpha wavelengths come about, but what is the source of Ca-K wavelengths?

Stephen

Hi Stephen


As I understant it,the absorption of the photospheric light by the ionized calcium atoms present in the chromosphere is the source of the Ca-K wavelengths.
Furthermore, the central part of the Ca-K line (the K3 portion) is where the ionized calcium atoms are higher in the chromosphere at about 2000km above the photosphere with the K1 at about 600km and K2 between about 700km and 1500km above.


I can recommend this link for a better explanation than I could ever give:


http://www.astrosurf.com/spectroheli...0k-line-en.php


Cheers
Maurice
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