Studies of bipolar nebulae. IV - MZ 3 /= PK 331 - 1 deg 1/

Details Studies of bipolar nebulae. IV - MZ 3 /= PK 331 - 1 deg 1/ Studies of bipolar nebulae. IV - MZ 3 /= PK 331 - 1 deg 1/

Apr 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...221..151c&link_type=abstract

Astrophysical Journal, Part 1, vol. 221, Apr. 1, 1978, p. 151-153, 155-162. Research supported by the National Research Council

Astronomy and Astrophysics

Astronomy

32

Astronomical Spectroscopy, Emission Spectra, Infrared Astronomy, Line Spectra, Nebulae, Abundance, Radio Spectra, Star Distribution, Ubv Spectra

Scientific paper

Optical photography and spectroscopy of the bipolar nebula Mz 3 and its exciting star are combined with infrared observations and preexisting radio data. Elemental abundances are obtained for the bright lobes of this nebula. The nebula is characterized by an electron temperature of 17,000 K and an electron density of 18,000 per cu cm, from the forbidden emission lines, and an overall mean density of 2300 per cu cm. The spectral type of the exciting star is O9.5 or B0. Multiaperture infrared observations and star counts around Mz 3 strongly suggest the existence of a circumstellar dust and gas disk which, in other bipolar nebulae, has only been inferred from the overall morphology. It is suggested that Mz 3 may represent a protoplanetary nebula

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