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How rare are nebulae which emit H-Beta/H-Gamma/H-Delta? (Balmer series) [duplicate]
Most of the visible light emission nebulae have a lot H-alpha emissions, and because of that appear red.
But why are other Balmer emissions much rarer? Do they need a hotter environment which is ...
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How to isolate H$_\alpha$ from Nitrogen doublet emission lines
I am trying to find out line intensity and FWHM of H$_\alpha$6565 emission line from a quasar spectrum obtained from SDSS DR-14Q. Visual inspection of spectrum shows H$_\alpha$ being contaminated with ...
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