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1997A&A...323..217P - Astronomy and Astrophysics, volume 323217-222 (1997/7-1)
NGC7027:discovery of a Raman line in a planetary nebula.
PEQUIGNOT D., BALUTEAU J.-P., MORISSET C. and BOISSON C.
Abstract (from CDS):
We report on the discovery of the He II Raman line λ 485.1nm in the spectrum of the planetary nebula NGC 7027. This line is direct evidence for the presence of atomic hydrogen in the nebula. It is shown that this Raman line can provide reliable pieces of information concerning both the velocity field of the He2+ region and the expansion velocity of the surrounding H0 shell. Detection of self-Raman scattering of Lyγ is suspected.
Abstract Copyright: ∼
Journal keyword(s): atomic processes - line: identification - line: profiles - ISM: general - ISM: planetary nebulae: general - ISM: planetary nebulae: individual: NGC 7027
Simbad objects: 2
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