VLA observations of twice ionized helium in NGC 6302

Details VLA observations of twice ionized helium in NGC 6302 VLA observations of twice ionized helium in NGC 6302

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987rmxaa..14..560g&link_type=abstract

(IAU, Reunion Regional Latinoamericana de Astronomia, 5th, Merida, Mexico, Oct. 6-10, 1986) Revista Mexicana de Astronomia y Ast

Astronomy and Astrophysics

Astronomy

5

Helium Ions, Ion Recombination, Planetary Nebulae, Radio Astronomy, Very Large Array (Vla), Line Of Sight, Radio Sources (Astronomy), Radio Spectra, Temperature Gradients, Velocity Distribution

Scientific paper

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.

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