Submillimetre observations of the cold dust halo of NGC 7027

Details Submillimetre observations of the cold dust halo of NGC 7027 Submillimetre observations of the cold dust halo of NGC 7027

Jun 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.208..517g&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 208, June 1, 1984, p. 517-523. Research supported by th

Astronomy and Astrophysics

Astronomy

20

Cosmic Dust, Halos, Planetary Nebulae, Submillimeter Waves, Continuous Radiation, Flux Quantization, H Ii Regions, Stellar Evolution, Stellar Mass, White Dwarf Stars

Scientific paper

The authors report the detection of submillimetre radiation from the planetary nebula NGC 7027. The measured flux at 370 μm is in excess of that expected from extrapolating the free-free emission of the H II region and the dust emission seen at 100 μm. This excess is interpreted as arising in a cold (≡20K) dust halo surrounding the planetary nebula. The dust grains responsible for the submillimetre halo emission are similar to those found elsewhere in the interstellar medium. The mass of dust required to produce the 370 μm excess is consistent with the halo mass of ⪆5 M_sun; deduced by Knapp et al. (1982). This supports their conclusion that the masses of some stars which evolve into white dwarfs rather than supernovae are at least ≡6.5 M_sun;.

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