Are bipolar nebulae biconical
1981; IOP Publishing; Volume: 247; Linguagem: Inglês
10.1086/159022
ISSN1538-4357
Autores Tópico(s)History and Developments in Astronomy
Resumoview Abstract Citations (39) References (36) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Are bipolar nebulae biconical ? Icke, V. Abstract The galactic objects known as 'bipolar nebulae' have the general appearance of a pair of butterfly wings centered on a compact source. The possibility is explored that this appearance is due to a biconical outflow pattern of gas above an almost Keplerian disk. It is argued that this pattern is to be expected quite naturally in association with a gaseous disk. The similarity between the shapes of the nebulae need not imply that they are similar in other respects, such as the evolutionary state. A description is presented of calculations which show that bipolar nebulae could well be biconical nebulae, due to hydrodynamic effects which give rise to a biconical outflow pattern. It is found that biconical outflow, such as probably occurs above certain types of luminuous disk, can account for the density distribution in bipolar nebulae. Publication: The Astrophysical Journal Pub Date: July 1981 DOI: 10.1086/159022 Bibcode: 1981ApJ...247..152I Keywords: Astrophysics; Planetary Nebulae; Stellar Mass Accretion; Stellar Models; Density Distribution; Eddington Approximation; Flow Distribution; Gas Density; Hydrodynamics; Radiative Transfer; Stellar Evolution; Velocity Distribution; Astrophysics full text sources ADS | data products SIMBAD (4)
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