Spectra of Gaseous Nebulae

1984 ◽  
pp. 18-38
Author(s):  
Lawrence H. Aller
Keyword(s):  
Gaseous Nebulae

The physics of gaseous nebulae

1988 ◽  
Vol 100 ◽  
pp. 412 ◽  
Author(s):  
Donald E. Osterbrock
Keyword(s):  
Gaseous Nebulae

Comparison of oxygen with the extra lines in the spectra of the helium Stars β crucis, &c.; also summary of the spectra of southern Stars to the 3 1/2 magnitude and their distribution

1898 ◽  
Vol 62 (379-387) ◽  
pp. 417-423 ◽  
Keyword(s):  
Type I ◽  
Gaseous Nebulae ◽  
Helium Stars

In a previous paper read before the Society on April 8, 1897, I suggested that the special lines present in spectra of the first division of helium stars (Type I, Divison la) might possibly be clue to oxygen. These stars are associated by their position and distribution with the gaseous nebulae, and some of the lines in their spectra correspond with bright lines observed by Campbell in nebulae. The suggestion from this was that these stars are in the first stage of tellar development from gaseous nebulæ.

scholarly journals Bowen fluoresence and He II lines in active galaxies and gaseous nebulae

1985 ◽  
Vol 299 ◽  
pp. 752 ◽  
Author(s):  
H. Netzer ◽  
M. Elitzur ◽  
G. J. Ferland
Keyword(s):  
Active Galaxies ◽  
Gaseous Nebulae

Interstellar Matter, Gaseous Nebulae, Planetary Nebulae

1972 ◽  
pp. 325-342
Author(s):  
Siegfried Böhme ◽  
Walter Fricke ◽  
Ulrich Güntzel-Lingner ◽  
Frieda Henn ◽  
Dietlinde Krahn ◽  
...  
Keyword(s):  
Planetary Nebulae ◽  
Interstellar Matter ◽  
Gaseous Nebulae

The Identification of the O V Forbidden Line in the Ultraviolet Spectrum of Gaseous Nebulae

1997 ◽  
pp. 259-259
Author(s):  
F. C. McKenna ◽  
F. P. Keenan ◽  
L. H. Aller ◽  
S. Hyung ◽  
W. A. Feibelman ◽  
...  
Keyword(s):  
Ultraviolet Spectrum ◽  
Gaseous Nebulae

Chemical Abundance Determinations in Gaseous Nebulae

1983 ◽  
pp. 525-525
Author(s):  
Sueli M. V. Aldrovandi
Keyword(s):  
Chemical Abundance ◽  
Gaseous Nebulae

scholarly journals Early days of Planetary Nebular theory

1997 ◽  
Vol 180 ◽  
pp. 3-9
Author(s):  
Lawrence H. Aller
Keyword(s):  
Unknown Origin ◽  
Bright Line ◽  
Gaseous Nebulae

The spectra of gaseous nebulae differed strikingly from those of stars which were well understood since 1922 thanks to the work of Saha. Gaseous nebulae exhibited exotic bright line spectra characterized by strange emissions of unknown origin as well as familiar lines of hydrogen and helium. The strongest lines in most nebulae fell at 4959A and 5007A. They were originally attributed to an unknown element. First came the interpretation of the lines of H.

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