The central star of NGC 7027

Details The central star of NGC 7027 The central star of NGC 7027

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...200l..21w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 200, no. 1-2, July 1988, p. L21-L24.

Astronomy and Astrophysics

Astrophysics

28

H Beta Line, Planetary Nebulae, Radio Stars, Stellar Magnitude, Stellar Temperature, Astronomical Photometry, Charge Coupled Devices, High Resolution, Pixels

Scientific paper

Narrow band continuum images of NGC 7027 have been taken using a charge-coupled device (CCD) at the prime focus of the 2.5 m Isaac Newton Telescope. The central star of NGC 7027 is clearly detected, its visual magnitude being measured at mv = 17.0±0.2. The effects of varying extinction across the nebula were analysed by comparing the optical Hβ map with a high resolution 2 cm radio map. This showed that the central star lies at a position of low extinction. Hence the usual value of extinction quoted for this nebula is too high when considering the extinction at the central star. When this difference in extinction at the central star is taken into account then the temperature of the central star as determined using the Zanstra method is ≡310,000K.

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