Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...210..366b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 210, no. 1-2, Feb. 1989, p. 366-372. Research supported by CAICYT.
Astronomy and Astrophysics
Astrophysics
53
Binary Stars, Carbon Monoxide, Molecular Gases, Planetary Nebulae, A Stars, Cosmic Dust, Emission Spectra, Ionized Gases, Line Spectra, Stellar Mass Ejection
Scientific paper
The CO J = 2-1 and J = 1-0 emission in the bipolar planetary nebular NGC 2346 has been mapped with a 12 arcmin resolution. The CO emission contours are shown to follow the main distribution of the ionized gas. It is found that the dense gas constitutes the walls of a cavity with a clumped structure, with prominent clumps concentrated on an expanding ring which surrounds the central star. The ring is tilted about 56 deg with respect to the line of sight and has an expansion velocity of 18 km/s and a kinematic age of about 1600 yr. The total mass of the molecular gas in the nebula is about 0.1 solar masses. The possible origin of the nebula morphology is examined. It is suggested that an interacting wind model may explain the observations.
Bachiller Rafael
Bujarrabal Valentin
Martín-Pintado Jesús
Planesas Pere
Tafalla Mario
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