Sunday, 12 January 2014

AR11944 Calcium Sun

ar11944-cak-colour by Mark Townley
ar11944-cak-colour, a photo by Mark Townley on Flickr.

Viewing the sun at near ultra violet wavelengths shows quite a different view of the sun than is seen in either white light or hydrogen alpha wavelengths. The white regions are areas of magnetic froth, with the brightest white spots around the sunspots representing the emerging flux region; an upwelling of the plasma flow before it returns to the solar surface along magnetic flux loops. The sun always has plenty to see in this wavelength, and I look forward to the sun being higher in the sky so that I can capitalise on the better seeing. This shot was taken with the 70mm scope at f12 with DMK31 camera, Beloptik Triband ERF and homebrew CaK filter with a DMK31 camera.