Identification of the central star of NGC 7027

Details Identification of the central star of NGC 7027 Identification of the central star of NGC 7027

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...333..193j&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 333, Oct. 1, 1988, p. 193-197.

Other

28

Planetary Nebulae, Stellar Magnitude, Stellar Spectra, Continuous Spectra, H Beta Line, Helium, Hydrogen, Stellar Luminosity, Stellar Mass

Scientific paper

The central star of NGC 7027 is unambiguously identified at a position which agrees well with that found by Harlan and Miller (1979), and Atherton et al. (1979). The visual magnitude of 16.32 + or - 0.35 falls in the range of 15 to 20 reported by other investigators and coincides with the estimate calculated by Shaw and Kaler (1982) of 16.4 needed to force equality between the hydrogen and helium-derived Zanstra temperatures. For m(v) = 16.3, E(B-V) = 0.85, T(asterisk) = 180,000 K, and a distance of 900 pc, the central star radius and luminosity are 0.072 solar and 4900 solar, respectively. The implied central star mass is about 0.65 solar if burning hydrogen and 0.70 solar if burning helium.

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