1997A&A...323..217P

Query : 1997A&A...323..217P

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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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* RR Tel Sy* 20 04 18.5404499712 -55 43 33.153979080 9.93 11.33 10.81 11.689   M5e 550 0
2 NGC 7027 PN 21 07 01.571952 +42 14 10.47120   10.358 8.831 10.157   ~ 2541 1

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