Planetary nebulae and the interstellar magnetic field

Details Planetary nebulae and the interstellar magnetic field Planetary nebulae and the interstellar magnetic field

Jun 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.191..761h&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 191, June 1980, p. 761-766.

Astronomy and Astrophysics

Astronomy

14

Interstellar Magnetic Fields, Magnetohydrodynamics, Planetary Nebulae, Cold Plasmas, Pressure Effects, Thermal Instability

Scientific paper

It is noted that a statistical correlation between the projected directions of the interstellar magnetic field and the major axes of planetary nebulae has been found previously. The present paper examines this result theoretically by means of a numerical hydromagnetic model of a cold plasma nebula expanding into a uniform vacuum magnetic field, with nebular gas accreting on the surface. It is found that magnetic pressure alone is probably not sufficient to shape most planetary nebula to the observed degree. Phenomena are discussed which could amplify simple magnetic pressure, alter nebular morphology and account for the observed correlation.

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