Sun in MgI(b2), H-alpha blue wing and Ca-K with Sol'Ex

A made a comparison of the Sun in the following lines : Mg I(b2), H-alpha blue wing (-1,5A) and Ca-K.
Good comparison between first two line, Ca-K is clearly higher above the photosphere.

 

H-alpha, H-beta and H-delta comparison

 

Comparison between H-alpha, H-beta and H-delta line of the sun. Images taken with heliospectrograph Sol'Ex v1 on TLAPO60/360 with ASI290MM.

First time : Imaging Sun in H-delta with Sol'Ex

My first time I imaged the Sun in H-delta. A comparison with my image of the Sun in H-beta shows that H-beta is more into the chromosphere then H-delta line.

Setting : TLAPO60/360 with Sol'Ex v1 and ASI290MM

Filter : Herschel Wedge (1.25")

Software : SharpCap4, Inti, JSolex, CS4

Sun H-Alpha with Sol'Ex and Herschel Wedge

The Sun imaged on July 28, 2024 using my Sol'Ex version 1 with Herschel wedge and ASI290MM. The focus was on the use of the Herschel Wedge. Image made in H-Alpha. 

Setting : TLAPO60/360, Sol'Ex v1 with ASI290MM
Filter : Herschel Wedge Lacerta (1.25")
Software : SharpCap 4, Inti, JSolex2.6.0, IMPPG and CS4

Sun in H-beta - Sol'Ex with Herschel Wedge

The Sun this morning in H-beta. This time I used my Sol'Ex version 1 with Herschel Wedge in stead of Solar filter Hoya ND16.

Setting : TLAPO60/360, Sol'Ex v1 with ASI290MM

Filter : Herschel Wedge Lacerta (1.25")

Software : SharpCap 4, Inti, JSolex2.6.0 and CS4

Line broadening in Sunspots with Sol'Ex

 

Using my Sol'ex (version 1) I'm able to observe line broadening in sunspots. As shown in the image, the spectrallines in sunspot 3759 (upper picture) is bolder and broader that the line in the photosphere (below of the picture). The phenomene is due to magnectic activity in sunspots and becomes visible in metalic spectrallines; in this case Titanium, Calcium and Iron. 

Milky Way Bortle Class 3 - Chatillon sur Indre

Chatillon sur Indre, is located in the département de l'Indre (region Centre-Val de Loire). We stayed four days at the "La Domaine de la Poignardiere".

The first day was almost entirely cloud free and I took my chance to take some pictures of the milky way. The moon was low above the horizon and the domaine was luminated which resulted in a minor light pollution. No other lights from the surrounding (towns) were visible. According World Map 2015 Light Pollution Map the area is bortle class 3:

SQM 21.81 mag./arc sec2
Brightness 0.203 mcd/m2
Artif. bright.32.0 μcd/m2

Setting : Nikon D7500 10mm ISO3200 30-60s exposure tim

Mount : Skywatcher Star Adventurer 2i

Unfortunately, the other 3 days the sky was covered with high and medium clouds.