Small study of the sun's surface. May 21, 2020

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oreoluna
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Small study of the sun's surface. May 21, 2020

Post by oreoluna » Thu May 21, 2020 7:30 pm

Hello everyone.
Here is a small surface study.

Redcontinuum and Cak.
Image


Red and blue wings.
Image


Doppler effect and both filters in line.
Image


Red wings and Ha line.
Image


In line again the obligatory prominences.
Image


Image

CS Jozef



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Re: Small study of the sun's surface. May 21, 2020

Post by marktownley » Thu May 21, 2020 7:55 pm

An excellent comparative set of images Jozef!


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Re: Small study of the sun's surface. May 21, 2020

Post by dhkaiser » Thu May 21, 2020 8:12 pm

Like the proms.


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Re: Small study of the sun's surface. May 21, 2020

Post by Starry Jack » Thu May 21, 2020 8:40 pm

Outstanding format for comparison.


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Re: Small study of the sun's surface. May 21, 2020

Post by RodAstro » Thu May 21, 2020 8:52 pm

A very nice and interesting set

Rod



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Re: Small study of the sun's surface. May 21, 2020

Post by p_zetner » Thu May 21, 2020 9:28 pm

A beautiful set of images and interesting study.
What does "Doppler effect and both filters in line" mean?

Cheers.
Peter



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Re: Small study of the sun's surface. May 21, 2020

Post by oreoluna » Thu May 21, 2020 9:44 pm

Thanks for the kind feadbacks.

@Peter
The Doppler effect is the temporal compression or expansion of a signal when the distance between transmitter and receiver changes during the duration of the signal.

In hydrogen alpha, this means that two wavelengths appear on one image. This effect is very interesting when there are flares. Then you can see not only the line but also fine filaments, usually running across an off-band line.
This is done with a double stacked system. One etalon in line is the second outside the line. For example in blue wings.

Red arrows! Doppler effect.
Image

CS Jozef



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Re: Small study of the sun's surface. May 21, 2020

Post by yltansg » Thu May 21, 2020 10:16 pm

Hi Jozef,

Nice sets of comparison images. Am I right to say that all the "lines" show the regions where there is doppler effect and you are showing only some of them?

Alfred



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Re: Small study of the sun's surface. May 21, 2020

Post by EGRAY-OBSERVATORY » Thu May 21, 2020 10:39 pm

WOW, an excellent and very interesting set of images Jozef - thanks vm

Terry



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Re: Small study of the sun's surface. May 21, 2020

Post by oreoluna » Thu May 21, 2020 10:55 pm

yltansg wrote:
Thu May 21, 2020 10:16 pm
Hi Jozef,

Nice sets of comparison images. Am I right to say that all the "lines" show the regions where there is doppler effect and you are showing only some of them?

Alfred
Only one of the pictures shows the Doppler effect. The others are correspondingly in the hydrogen alpha line or offband. The Image Doppler effect shown shows the chromosphere somewhat more transparently. If there were an element from another line, it would be additionally visible in this image, as on the image with the flare.
CS Jozef



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Re: Small study of the sun's surface. May 21, 2020

Post by oreoluna » Thu May 21, 2020 10:56 pm

Thanks Terry.



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Re: Small study of the sun's surface. May 21, 2020

Post by DeepSolar64 » Fri May 22, 2020 6:45 am

WoW, an outstanding comparative study Jozef! I still have so much to learn about the peculiarities of Hydrogen-Alpha.


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Re: Small study of the sun's surface. May 21, 2020

Post by Montana » Fri May 22, 2020 8:01 am

A stunning collection Jozef :bow :hamster: I had forgotten how enjoyable it is to look at the wings in Halpha, I must try that again, although I can only get the blue wing with my tilt etalon.

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Re: Small study of the sun's surface. May 21, 2020

Post by marktownley » Fri May 22, 2020 10:05 am

oreoluna wrote:
Thu May 21, 2020 9:44 pm
Thanks for the kind feadbacks.

@Peter
The Doppler effect is the temporal compression or expansion of a signal when the distance between transmitter and receiver changes during the duration of the signal.

In hydrogen alpha, this means that two wavelengths appear on one image. This effect is very interesting when there are flares. Then you can see not only the line but also fine filaments, usually running across an off-band line.
This is done with a double stacked system. One etalon in line is the second outside the line. For example in blue wings.

Red arrows! Doppler effect.
Image

CS Jozef
Impressive science behind this Jozef. Kinda reminds me of the shockwave when a plane has a sonic boom...


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Re: Small study of the sun's surface. May 21, 2020

Post by Carbon60 » Fri May 22, 2020 10:12 am

Very interesting and beautifully presented comparisons, Jozef.

Another reminder of how dynamic this region is and of how fast these things are moving within the spicule field and filaments.

Stu.


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