NGC7027:discovery of a Raman line in a planetary nebula.

Details NGC7027:discovery of a Raman line in a planetary nebula. NGC7027:discovery of a Raman line in a planetary nebula.

Jul 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...323..217p&link_type=abstract

Astronomy and Astrophysics, v.323, p.217-222

Astronomy and Astrophysics

Astrophysics

18

Atomic Processes, Line: Identification, Line: Profiles, Ism: General, Ism: Planetary Nebulae: General, Ism: Planetary Nebulae: Individual: Ngc 7027

Scientific paper

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 He^2+^ region and the expansion velocity of the surrounding H^0^ shell. Detection of self-Raman scattering of Lygamma_ is suspected.

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