Observation by Kevin Gurney: Balmer line widths using an Alpy
Uploaded by
Kevin Gurney
Observer
Kevin Gurney
Observed
2018 Mar 18 - 12:00
Uploaded
2018 Mar 18 - 18:30
Objects
Spectrum
Equipment
- Celestron 8SE
- Altair Astro RC10
- Alpy 600
- Atik 460EX
- Celestron 0,63 FR, ASA 0.77FR
Location
West Sheffield
Target name
Type A stars with variety of luminance classes
Title
Balmer line widths using an Alpy
About this image
Stuck indoors with a snow storm, I was reading Richard Walkers Spectral Atlas for Amateurs. I came to the part about luminance classes (I thru V) changing the line width in the Balmer series, and wondered if I could see this in my collection of Alpy 600 spectra. I trawled through it and found a set of A-type candidates (taken at various times). I think I can see the effect here....
Files associated with this observation
Like this image
Dr Andrew Smith,
David Swan,
Jeremy Shears,
john simpson,
Graham Winstanley,
David Basey,
Peter Mulligan,
Andy Wilson,
Peter Carson,
Hugh Allen,
Kevin Gurney
Comments
Hi Kevin,
This is really interesting. In particular eta Leo wonderfully shows the narrower lines in the low density supergiant class I, I shall have to look at some of my Alpy data as well. Would the H-beta line in eta Leo be expected to be weaker especially since it's an A0 star? Fascinating stuff
Cheers
Hugh
Hi Hugh
Apologies for delay - just seen your post..[Better late than never?!]
I think eta Leo is weaker - see plot B which is not auto-scaled...
cheers
Kevin
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