Continuum observations and the electron temperature of NGC 7027

Details Continuum observations and the electron temperature of NGC 7027 Continuum observations and the electron temperature of NGC 7027

Feb 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apl....17..163k&link_type=abstract

Astrophysical Letters, vol. 17, no. 4, 1976, p. 163-166. Research supported by the John Simon Guggenheim Memorial Foundation

Astronomy and Astrophysics

Astrophysics

5

Astronomical Photometry, Continuous Spectra, Electron Energy, Planetary Nebulae, Stellar Temperature, Balmer Series, Electrophotometry, H Beta Line, Interference Grating, Radiant Flux Density, Visual Observation

Scientific paper

Absolute continuum flux densities of the planetary nebula NGC 7027 are measured photoelectrically at wavelengths of 5500, 4428 and 3552 A. The values obtained are in good agreement with those measured by Miller and Mathews (1972) and Danziger and Goad (1973). Comparison of all the observations with theory indicates an excess of continuum radiation longward of about 5000 A. An electron temperature of 11,300 K is derived from the ratio of the Balmer continuum flux density to the H-beta flux, which is close to the values determined from forbidden lines.

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