Study of spectral variability of the planetary nebula IC 4997 over 25 years (1972-1996)



Document title: Study of spectral variability of the planetary nebula IC 4997 over 25 years (1972-1996)
Journal: Revista mexicana de astronomía y astrofísica. Serie de conferencias
Database: PERIÓDICA
System number: 000187918
ISSN: 1405-2059
Authors: 1
Institutions: 1Sternberg Astronomical Institute, Moscú. Rusia
Year:
Season: Feb
Volumen: 12
Pages: 167-167
Country: México
Language: Inglés
Document type: Artículo
Approach: Analítico
Disciplines: Física y astronomía
Keyword: Astronomía,
Nebulosas planetarias,
Variabilidad espectral,
Excitación,
Ionización,
Parámetros físicos
Keyword: Physics and astronomy,
Astronomy,
Planetary nebulae,
Spectral variability,
Excitation,
Ionization,
Physical parameters
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