Any ideas? mystery bubble

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Any ideas? mystery bubble

Post by Montana »

Hi all,

Andy Devey in Spain captured this amazing animation on the 16th March, the sequence runs from 12:44 to 15:08 UT
A strange dark bubble (approximately earth size) lifting off the photosphere and passing up through the large prominence. Does anyone know what this could be?

My thoughts are that it is a cooler bubble of plamsa lifting away (less bright), but then usually it is the most energetic plasma that can lift away. Any possible mechanism ideas would be greatly appreciated.
2021-03-16-at-12-44-21-to-15-08UT-animation.gif
2021-03-16-at-12-44-21-to-15-08UT-animation.gif (2.25 MiB) Viewed 489 times
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Re: Any ideas? mystery bubble

Post by Carbon60 »

Hi Alexandra,

Maybe it's a bubble of... nothing...a void in the prom plasma driven by movements in the local magnetic flux.

Stu.


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Re: Any ideas? mystery bubble

Post by DeepSolar64 »

I was thinking a void as well but it does move like it has substance I would not rule out the possibility of a darker cooler plasma.

Maybe it’s Dark Matter!!?? 😆


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Re: Any ideas? mystery bubble

Post by StarHugger »

Looks translucent like its in front of the prom and it distorts the view as it rises. Whatever it is it doesent appear to be affected by the same mechanics as the prom as its movement seem more fluid making me think its escaping helium. But I'm just guessing of course, Its certainly interesting Alexandra thanks for sharing this.


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Re: Any ideas? mystery bubble

Post by rsfoto »

My thoughts are that it is a cooler bubble of plamsa lifting away (less bright), ...
Hi Alexandra,

As I am very fond of Occam's Razor for me it is exactly what you worte ...

:mrgreen:


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Re: Any ideas? mystery bubble

Post by StarHugger »

Some cool info about escaping helium...

https://zephyrsolutions.com/stellar-lif ... m-the-sun/


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Re: Any ideas? mystery bubble

Post by GUS »

https://www.youtube.com/watch?v=ktzJiQyXLUk
From about 10 and 28 sec right of centre. Not sure if any relation to your event Alexandra.


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Re: Any ideas? mystery bubble

Post by Montana »

Thanks everyone, lots of really interesting and unusual ideas here :) all could be be possible. There is a never a dull moment on the Sun :hamster:

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Re: Any ideas? mystery bubble

Post by christian viladrich »

Looks more like something flying in the air (insects, balloon ?).
Considering the speed, it rather straigtforward to calculate the speed of the "event" if it was at solar distance.


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Re: Any ideas? mystery bubble

Post by GUS »

i don't know, look at it zoomed 300 or 400 percent, looks to be originating from the disk, maybe?


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Re: Any ideas? mystery bubble

Post by Montana »

It is an animation over 1 and half hours so it is not a terrestrial event.

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Re: Any ideas? mystery bubble

Post by ffellah »

An interesting thread, Alexandra, thank you

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Re: Any ideas? mystery bubble

Post by christian viladrich »

It would be interesting to have the still images with date corresponding to 3 or 4 different possition of the "object".
Knowing the focal length or image scale would be useful too.
Was a flat image used for processing ?


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Re: Any ideas? mystery bubble

Post by christian viladrich »



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Re: Any ideas? mystery bubble

Post by Montana »

Oh yes! I can see the wee bubble in JPP's first image and also moving up in the GONG images, thanks guys. So it is a real event then. I will ask Andy the question about the flat and also 2 timed images so we can measure and determine speed. Thanks guys :)

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Re: Any ideas? mystery bubble

Post by DeepSolar64 »

Yes. Find out the times from the imager when it took place and use the SDO data and GONG. Helioviewer.org can layer and do videos using SDO data. Others are on the right track here on solving the solar bubble mystery.


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Re: Any ideas? mystery bubble

Post by marktownley »

Carbon60 wrote: Thu Mar 18, 2021 9:25 pm Maybe it's a bubble of... nothing...a void in the prom plasma driven by movements in the local magnetic flux.
I totally agree!

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Re: Any ideas? mystery bubble

Post by Montana »

OK, thanks guys, here are some questions answered by Andy

I was at 1.6 m focal length with my SM90 and single stacked on this occasion. I did not do flats. All the images are date and time stamped with the UT at the start of each 300-frame sequence. I was shooting at 30 frames a second but do not achieve that rate due to slow computer. I have included the individual frames of the event (I have not flipped them in the horizontal plane). The event started at 13:54UT. I processed in Registax 6. By over exposing the photosphere the images all show the chromosphere that can be used for scaling the anomaly.

If anyone is good at maths and wants to calculate the speed you are welcome (maths is not my strong point) :)
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Re: Any ideas? mystery bubble

Post by rsfoto »

If anyone is good at maths and wants to calculate the speed you are welcome (maths is not my strong point)
Hi Alexandra,

In order to calculate the speed we need some more info and that is the used camera so we can calculate the image scale arc seconds per pixel and then fiddle out the km per pixel, etc.

Looking at your time stamps it was quite slow and took about 35 minutes from the beginning till it disappears. From first frame to last frame.

IMHO


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Re: Any ideas? mystery bubble

Post by Montana »

Andy has managed to track down a most likely cause for the event, something we should all look out for when observing
https://www.space.com/11684-plasma-bubb ... torms.html

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Re: Any ideas? mystery bubble

Post by ffellah »

Thank you, Alexandra, very interesting

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Re: Any ideas? mystery bubble

Post by DeepSolar64 »

The photo in the article certainly looks like what was imaged. It states that it is much hotter than the surrounding plasma, but still it appears dark. Why? From a visual standpoint this could be explained by it emitting it’s light in the ultraviolet which the eye cannot see. But orbiting observatories such as the SDO and Hinode can see into the far ultraviolet. Shouldn’t they see these bubbles then as bright objects? Also, maybe they are dark because their density is lower than the plasma around them?

Still pondering 🤔.


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Re: Any ideas? mystery bubble

Post by DeepSolar64 »

Playing with SDO data on helioviewer during the time of the bubble I see nothing that exactly corresponds to the bubble seen in Ha although there is certainly something going on there. There IS a complex dark gap or mass there. But even here in the deep ultraviolet it is dark. Like in sunspots dark usually means cooler. Hot usually shows up bright in UV. I am left scratching my head on this.

He certainly found something special and unique on his images. But exactly to what it's nature is I still find puzzling.

James


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Re: Any ideas? mystery bubble

Post by AJamesB »

Interesting! As much as the stringy bits of the proms wiggle, twist, waggle, etc., is it possible its just an illusion, and that by pure chance two adjacent stingy bits had horizontally opposite but vertically synced waggles? I of course am using very professional terminology here, lol.

It would be interesting if someone has the original video of one of the frames where the bubble is present and can create a single frame and then crank up the exposure on it (thus overexposing everything around it) to see if there is any detail within the darker buble space.

This is really outside of anything I'd have any ideas about though. I enjoy the artistic and techy sides of solar imaging but don't really have much working knowledge of the sun itself or the science behind it all. That is where ya'all come in:)


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Re: Any ideas? mystery bubble

Post by Bob Yoesle »

Another poster of Andy's video has several links on Cloudy Nights. This earlier one by Berger seems to cover the subject of Andy's video, and the Space.com article quoting Berger, quite well.


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