Quiescent, polar/crown ... prominence/s

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Quiescent, polar/crown ... prominence/s

Post by Averton »

An attempt at prominence classification.
2023-01-08 NW prom.jpg
2023-01-08 NW prom.jpg (832.36 KiB) Viewed 1178 times
1. Quiescent. There are two definitions given that we can find. First being long lived, fairly static which this prom definitely was as it had been there for more than a day. How do you tell that something has been there for a length of time from a single image? The second definition for quiescent we have found is not associated with an active region which is clear in this case even from a single image. So tick.

2. Polar/crown filament/prominence. This prom fits the definition as it is in a very high latitude and is running around a latitude line. This however is not that apparent from this single image but the full disk image of the day places it in the right locality. So another tick.

Now it gets tricky.
Is it an it? ie is it only one prominence or are there a number of prominences?
There is no doubt that there is at least 3 points of connection to the disk in the image that are distance separated ie closer and further away.
Some of the classification terms that we have seen thus far that could apply are as follows.
1. Arch
2. Tree trunk/tree
3. Tornado (which is also the trunk of the tree) - more evident in the animation but hinted at in the image
4. Coronal rain - this is not evident in this image but our animation clearly showed material raining down on the right hand side (can this be allowed with a quiescent prom? Menzel-Evans system suggests yes, in a non sun spot area)
5. Suspended cloud

Does height need to be part of a classification system? The tallest section of this/these prom/proms is about 150,000km high. As a quiescent prom, is it trying to be a disparition brusque? Again from a single image how can you tell?


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Re: Quiescent, polar/crown ... prominence/s

Post by rigel123 »

Good points folks. I would think, from watching this for a number of days, that it would definitely fit under Quiescent as well as Polar Crown since for a while this was a filament/filaprom right at the top of the sun. I read somewhere that once a prom reaches a certain height, and it may have been 150,000km that they then typically become a Disparition Brusque. So on the "Tree" of proms it might be Quiescent/Polar Crown/Disparition Brusque at this point. I'll attach a shot of a FD that shows this same prom 3 days earlier and if you can zoom in you can see several anchor points to it.
FD-1-4-2023.jpg
FD-1-4-2023.jpg (308.86 KiB) Viewed 1166 times


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Re: Quiescent, polar/crown ... prominence/s

Post by Averton »

Here is a follow up image two days later.
The classification of quiescent and polar/crown remains true but other features have disappeared perhaps now it only qualifies as being an arch. The thought that because of its height it might have been a disparition brusque seems unlikely as it now just looks like it might just fade away.
2023-01-11 NW prom.jpg
2023-01-11 NW prom.jpg (810.48 KiB) Viewed 1146 times


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Re: Quiescent, polar/crown ... prominence/s

Post by Montana »

I don't think it is fading away, just going around the pole corner, I have my money on that he will back :)

A disparition brusque event is when it reaches a certain height, then floats away, you would see this event as a sudden detachment. We see this a lot but call them lift-off! may be we should adopt the solar terminology :oops: This prom was so high I am surprised it hasn't done this, or it did it when we weren't watching, or he will back like the Terminator :)

Alexandra


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