A spectrum of bright NGC 40 planetary nebula taken with a Celestron 9 + LISA + Atik460EX.
First the image from the guiding CCD camera:
I took the spectra of two part, nebula and central star (a typical Wolf-Rayet star, T = 80000 K):
The low exitation nebula spectrum:
The hot star:
Christian B
Nebula page: http://www.astrosurf.com/buil/nebula/nebula.html
Planetary nebula NGC 40 spectrum
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Re: Planetary nebula NGC 40 spectrum
Hi Christian,
Have you noticed how similar the central star spectrum is to WR135?
http://www.astrosurf.com/buil/survey/wr ... html#WR135
Presumably this star is still losing material in powerful stellar winds.
Cheers
Robin
EDIT: I just looked up NGC 40. It is indeed classed as a Wolf Rayet star (type WC)
http://simbad.u-strasbg.fr/simbad/sim-b ... BAD+search
I spotted the similarity in the spectrum first though, honestly
Have you noticed how similar the central star spectrum is to WR135?
http://www.astrosurf.com/buil/survey/wr ... html#WR135
Presumably this star is still losing material in powerful stellar winds.
Cheers
Robin
EDIT: I just looked up NGC 40. It is indeed classed as a Wolf Rayet star (type WC)
http://simbad.u-strasbg.fr/simbad/sim-b ... BAD+search
I spotted the similarity in the spectrum first though, honestly
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
http://www.threehillsobservatory.co.uk
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Re: Planetary nebula NGC 40 spectrum
Exact Robin, the paralellism with WR135 is evident (a fine example of WC Wolf-Rayet star)
(Referenced here https://www.cfa.harvard.edu/~pberlind/a ... wrcat.html -> HD826)
Christian
(Referenced here https://www.cfa.harvard.edu/~pberlind/a ... wrcat.html -> HD826)
Christian