SHG 1st light of 2016: AR12529 in Ca H

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p_zetner
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SHG 1st light of 2016: AR12529 in Ca H

Post by p_zetner » Sun Apr 17, 2016 4:20 am

A second view of the Great Spot. This time a spectral series through the CaH spectral line (Blue to red is upper left to lower right and I have yet to calibrate the step size.)

An interesting observation: What I thought was a light bridge in the spot centre becomes much brighter near line centre, indicating more of a chromospheric nature to this feature, suggesting it exists high in the solar atmosphere. I was under the impression that light bridges were photospheric.

Cheers.
Peter.
Montage_125127_flat-cor-siz-proc.png

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Re: SHG 1st light of 2016: AR12529 in Ca H

Post by Derek Klepp » Sun Apr 17, 2016 5:37 am

Thanks Peter

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Re: SHG 1st light of 2016: AR12529 in Ca H

Post by marktownley » Sun Apr 17, 2016 7:13 am

This is a lovely sweep Peter! When I was using the CaH Quark I also found the plage got dimmer as you tuned either side of the centre line, your images show it very well. This spot seems to have quite a quite a few of the floating tendrils. Here's a shot I took yesterday in CaK that shows it.
ar12529-cak-close-crop.jpg
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Re: SHG 1st light of 2016: AR12529 in Ca H

Post by DSobserver » Sun Apr 17, 2016 8:16 am

Really interesting!

It show that SHG can really make science even on a amateur level!

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Re: SHG 1st light of 2016: AR12529 in Ca H

Post by highfnum » Sun Apr 17, 2016 10:47 pm

ill second that statement

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Re: SHG 1st light of 2016: AR12529 in Ca H

Post by p_zetner » Mon Apr 18, 2016 3:14 am

Thanks, Everyone!

Thanks for the image, Mark. So, I guess we're observing these chromospheric tendrils rather than a photospheric lightbridge.

Cheers.
Peter.

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Re: SHG 1st light of 2016: AR12529 in Ca H

Post by Montana » Wed Apr 20, 2016 7:07 am

Superb images Peter :bow :bow :hamster: I have definitely seen light bridges in Halpha, CaK and WL

Alexandra

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