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Prom types?

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#1 descott12

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Posted 18 May 2019 - 06:16 PM

Hello all,
Some pretty cool proms today. I have been trying to determine what the proper nomenclature is for the various shapes. There seems to be at least two different classifications ( H Zirin "Astrophysics of the sun" and J Jenkins "Observing the sun").

 

In the attached picture, the prom at 1 o'clock appears to be a quiescent, descending form (maybe a brusque or haystack)  but Jenkins describes something very similar in appearance as a bubble and plume (p.73) which is primarily descending but with focal ascending areas.

 

The proms at 3 o'clock appear to be active surges.

 

What to you all think?

Attached Thumbnails

  • Sun_00001_WithDisplayStretch3.png

Edited by descott12, 18 May 2019 - 09:18 PM.

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#2 Aaron Small

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Posted 18 May 2019 - 07:14 PM

Dave,

 

Saw your post and couldn't help to think that my daughter just left for Prom which lasts around the clock and not just at 3 o'clock.  lol.gif   



#3 descott12

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Posted 18 May 2019 - 07:20 PM

Dave,

 

Saw your post and couldn't help to think that my daughter just left for Prom which lasts around the clock and not just at 3 o'clock.  lol.gif   

Nice. I hope she has fun.



#4 Aaron Small

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Posted 18 May 2019 - 07:42 PM

Yeah, Just not too much...


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#5 rigel123

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Posted 18 May 2019 - 09:06 PM

I like Zirin's and would say curtain, but lovely all the same!



#6 BYoesle

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Posted 19 May 2019 - 06:29 PM

 

... but Jenkins describes something very similar in appearance as a bubble and plume (p.73) which is primarily descending but with focal ascending areas

 

Hi Dave, I believe these terms describe features within this Quiescent Hedgerow prominence, and are not a type of prominence themselves.

 

It's difficult to say what the features at 3 o'clock are. If they are very short lived they are surge prominences, if not they most likely are decaying prominence fragments. Given we're in a relatively quiet period, I lean towards fragments, unless these features lie near a solar active region beyond the limb and are short lived. A typical surge prominence will come and go within 10-20 minutes or so, and have a bit better defined appearance.

 

Surge Prom.jpg



#7 descott12

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Posted 19 May 2019 - 08:28 PM

Hi Dave, I believe these terms describe features within this Quiescent Hedgerow prominence, and are not a type of prominence themselves.

 

>> Yes, they were described as being inside a prominence. So that is a hedgerow.  Thanks

 

It's difficult to say what the features at 3 o'clock are. If they are very short lived they are surge prominences, if not they most likely are decaying prominence fragments. Given we're in a relatively quiet period, I lean towards fragments, unless these features lie near a solar active region beyond the limb and are short lived. A typical surge prominence will come and go within 10-20 minutes or so, and have a bit better defined appearance.

 

>> I didn't watch them for too long  so not sure how short or long the existed. They looked sort of arced/curved like a surge...



#8 MalVeauX

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Posted 20 May 2019 - 06:52 AM

Heya,

 

I like this handy reference:

 

Prominence_Types.jpeg

 

Very best,


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#9 KarlL

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Posted 20 May 2019 - 07:27 AM

Marty -

 

I’m still learning the types, and this is very helpful because it is concise.

 

Thanks.



#10 descott12

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Posted 20 May 2019 - 09:59 AM

Hey Marty,

Yes that was one of my references. It is handy. I didn't think the large one was a hedgerow since they tend to have distinct separate "trunks" and they often do not taper on the ends. The large one seemed different more like a curtain/brusque...



#11 Special Ed

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Posted 20 May 2019 - 10:32 AM

Hi Everyone,

 

These two proms were on the western limb yesterday.  I got a chance to see and sketch them thanks to a heads up from a friend in Germany who sketched them at 1200 UT.

 

So here's a chance to practice prom ID.  What type do you think they are?

 

BTW, I think the prom on the left is associated with AR 2741 which had rotated out of sight at about that location.

 

Solar Proms_2019.05.19_v1.jpg


Edited by Special Ed, 20 May 2019 - 10:38 AM.

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#12 MAURITS

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Posted 20 May 2019 - 03:53 PM

Love this sketch Michael.



#13 Special Ed

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Posted 20 May 2019 - 10:27 PM

Thanks, Maurits--and thanks for the like, Bob.  smile.gif 

 

I think these are both quiescent type proms.  Proms can be combinations of the ones classified by Zirin.  I think the one on the right is an arch/irregular arch/fragment and the one on the left is a platform.




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