On the origin of double shell planetary nebulae - The case of NGC 2392

Details On the origin of double shell planetary nebulae - The case of NGC 2392 On the origin of double shell planetary nebulae - The case of NGC 2392

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987crasb.304..893p&link_type=abstract

Academie des Sciences (Paris), Comptes Rendus, Serie II - Mecanique, Physique, Chimie, Sciences de l'Univers, Sciences de la Ter

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Computational Astrophysics, Interstellar Matter, Planetary Nebulae, Stellar Envelopes, Stellar Magnetic Fields, Lyman Alpha Radiation, Stellar Evolution, Stellar Mass Ejection, Stellar Structure

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It is shown that the existence of a detached double shell in certain planetary nebulae could result from the evolution of the magnetic field of a red giant following the ejection of matter in the form of a continuous massive wind of about 0.00001 solar mass/yr. Following an acceleration phase and the subsequent formation of the exterior halo, a second phase is predicted which produces the more dense internal envelope. Previous observations of NGC 2392 show the existence of a polarizing mechanism in the gas core which could be the mechanism proposed by Davis and Greenstein (1951).

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