The dense planetary nebula like object MWC 17

Details The dense planetary nebula like object MWC 17 The dense planetary nebula like object MWC 17

Apr 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....56..265l&link_type=abstract

Astronomy and Astrophysics, vol. 56, no. 1-2, Apr. 1977, p. 265-272. Research supported by the Bat-Sheva de Rothschild Research

Astronomy and Astrophysics

Astrophysics

9

B Stars, Emission Spectra, Planetary Nebulae, Stellar Spectra, Balmer Series, Electron Density (Concentration), Electron Energy, Interstellar Extinction, Iron, Silicon

Scientific paper

Identifications and relative intensities of emission lines observed in the star MWC 17 are presented. Some physical processes in the envelope are discussed, in particular self-absorption in hydrogen and helium and excitation of Fe II lines. Analysis of line-intensity ratios indicate that the emission originates in an envelope with a mass of at least 0.06 solar mass, density of 5 million per cu cm or larger, temperature of around 8000 K, and a radius of the order of 1000 AU, illuminated by an O9 I or earlier-type star.

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