HeD3 flash shot , request to p_zetner to review

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highfnum
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HeD3 flash shot , request to p_zetner to review

Post by highfnum » Sat May 14, 2016 10:13 pm

in another thread Peter told me about a trick to ID HeD3 line
I tried to duplicate I think I got it but
it would be nice if verified
hed3x.jpg
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Re: HeD3 flash shot , request to p_zetner to review

Post by highfnum » Sat May 14, 2016 10:15 pm

I marked up image
it was more interesting visually
question
peter why does this happen?
at this point does it become an emission line instead of absorption line
hed3y.jpg
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Re: HeD3 flash shot , request to p_zetner to review

Post by highfnum » Sun May 15, 2016 4:48 am

a few frames earlier may be better
hed3e.jpg
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Re: HeD3 flash shot , request to p_zetner to review

Post by Wah » Sun May 15, 2016 5:18 pm


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Re: HeD3 flash shot , request to p_zetner to review

Post by p_zetner » Thu May 19, 2016 2:16 am

Looks like you found it. I'm assuming the emission line you're seeing is on the blue side of the Na doublet.

Any gas that exists in the chromosphere will shine by emission near the limb. It's a process called fluorescent or resonant scattering. Continuum light from the photosphere is absorbed by a strong line of the chromospheric gas and re-emitted (scattered) in all directions, some toward your SHG.

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Re: HeD3 flash shot , request to p_zetner to review

Post by highfnum » Thu May 19, 2016 8:40 pm

yes towards the blue
thx guys
nice little trick Peter

any other lines does that little trick work?

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Re: HeD3 flash shot , request to p_zetner to review

Post by highfnum » Thu May 19, 2016 8:41 pm

also

i used 2400 lpmm grating

would 1800 or 1200 be better?

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