Sun May 19 H-Alpha and HeID3

About 90 minutes after sunrise I'm able to observe the Sun with my Sol'Ex. Seeing should be better during these early moments. 

Setting:

TLAPO80/480 with Sol'Ex Pro 2nd Gen Slit and ASI678MM

Herschel Wedge

Tilt <0,5° and Sx/Sy < 1,1

Software: SharpCap, Inti, JSolex and CS4

Imaging H-Alpha en HeI D3

Sun May 14 in H-Beta, CaIIH and HeID3

The Sun imaged on May 14, 2025 in Helium I D3, CaIIH and H-Beta.

Setting:

TLAPO80/480 with Sol'Ex Pro 2nd Gen Slit an ASI678MM

Herschel Wedge

Tilt <0,5° and Sx/Sy=1,08

Software : SharpCap, Inti, JSolex 3.1.3, CS4

The Sun in H-Alpha

The Sun this morning very early at UT5h50, in H-Alpha.

Sun H-alpha, beta and CaIIH

I re-adjested the collimation of my Sol'Ex. The ressult is a much sharper image. Beside the re-adjustment, seeing and transparency was very good.

The Sun on May 9

This morning, very early about 7h48 (UT5h48), I made some images of the Sun. Tranparency was good and moderate seeing.

Setting:

TLAPO80/480 f/6 with Solex Pro 2nd Gen slit and ASI678MM

Herschel Wedge

Tilt <0,3° and Sx/Sy = 1,1

Software : SharpCap, Inti, Astrosurface, CS4

  

Sol'Ex May 1 with flare in AR4079

Images of the Sun on May 1, 2025 using my Sol'Ex Pro 2nd Gen Slit. The H-beta shows also a flare in AR4079. I'm also proud of my CaIIH image for which the seeing conditions were very good. This is one of my better CaII image.

Imaging in BaII D2 en MgI B2

How cool is this. I imaged the Barium ion (BaII D2) line at 4554A. I did not expect anything, but it did, with some structure over the entire sun's disk. I seached more in the literature and found that the line is representing the low chromosphere, the same as the MgIb2 line. Thus I imaged the MgIb2 line and compared with the BaII line. Observation: more details in the sunspot, structure is same between Ba and Mg. Interesting is that Ba structure is dark, while the one for Mg is lighter.

According to Olshevsky et al. (2008) and Sütterlin et al. (2001), the core of this line forms at about 700km.

Via a FB post I got feedback from Varadi Nagy Pal on more metal elements which show structure and even faint prominences. For more information see his blog https://csillagtura.ro/

He mentiones Fe, Ni, Sr of which Sol'Ex images are made. I will try to locate them using JSolex Spectrum analyzer.