The molecular envelopes of evolved planetary nebulae

Journal Article · Wed Aug 01 04:00:00 EDT 1990 · Astronomical Journal; (USA)

DOI:https://doi.org/10.1086/115532· OSTI ID:6593015

Healy, A P; Huggins, P J ^[1]

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1. New York Univ., NY (USA)

CO mapping observations are reported for three evolved planetary nebulae: NGC 7293, NGC 6720, and NGC 6072. Each has a substantial molecular envelope whose structure reflects the morphology of the ionized nebula. In the nearest, NGC 7293, which can be studied in most detail, the molecular gas is closely associated with the optical double-ring system, the kinematics show distinct though incomplete shell structures, and the gas is fragmented on the smallest size scales observed. The mass of molecular gas in these objects is comparable to or exceeds the mass of ionized gas. 22 refs.

• OSTI ID: 6593015
• Journal Information: Astronomical Journal; (USA), Journal Name: Astronomical Journal; (USA) Vol. 100; ISSN 0004-6256; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COSMIC GASES
EMISSION SPECTRA
FLUIDS
GASES
IONIZED GASES
MASS
MOLECULES
MORPHOLOGY
NEBULAE
OXIDES
OXYGEN COMPOUNDS
PARTICLE KINEMATICS
PLANETARY NEBULAE
SPECTRA
STAR EVOLUTION