Keywords
Helium Ions
Ion Recombination
Planetary Nebulae
Radio Astronomy
Very Large Array (Vla)
Line Of Sight
Radio Sources (Astronomy)
Radio Spectra
Temperature Gradients
Velocity Distribution
Astrophysics
Planetary Nebulae:Helium
Planetary Nebulae:Radio Lines
Planetary Nebulae:VLA Maps
Radio Lines:Planetary Nebulae
VLA Maps:Planetary Nebulae
Ion Recombination
Planetary Nebulae
Radio Astronomy
Very Large Array (Vla)
Line Of Sight
Radio Sources (Astronomy)
Radio Spectra
Temperature Gradients
Velocity Distribution
Astrophysics
Planetary Nebulae:Helium
Planetary Nebulae:Radio Lines
Planetary Nebulae:VLA Maps
Radio Lines:Planetary Nebulae
VLA Maps:Planetary Nebulae
How to Cite
VLA observations of twice ionized helium in NGC 6302. (1987). Revista Mexicana De Astronomía Y Astrofísica, 14(1), 560-566. https://astronomia.unam.mx/journals/rmxaa/article/view/1987rmxaa..14..560g
Abstract
An average He(2+)/H(+) value of about 0.06 + or - 0.02 is obtained from VLA observations of the H 76-alpha and He(+) 121-alpha radio recombination lines, and their adjacent continua, from the planetary nebula NGC 6302. The variations in the H 76-alpha/continuum ratio that are observed across the nebula's face are potentially ascribable to the contribution of twice-ionized He to the continuum, as well as the possible presence of a gradient in the electron temperature and 10-20 percent LTE departures.Similar Articles
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