Mathematics – Logic
Scientific paper
Jan 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985nascp2358...91p&link_type=abstract
In NASA. Goddard Space Flight Center The Origin of Nonradiative Heating/Momentum in Hot Stars p 91-100 (SEE N85-17755 08-88)
Mathematics
Logic
Hot Stars, Nebulae, Stellar Mass Ejection, Stellar Models, Bipolarity, H Ii Regions, Planetary Nebulae, Radial Velocity, Stellar Magnetic Fields, Symmetry
Scientific paper
A general program on the internal velocities in H II regions was carried out within the past decade by the use of photographic Fabry-Perot interferometry, in the H (alpha) line and lately also in the N IIlambda 6584 line. Among the score of objects studied three H II regions and one planetary nebula possess pronounced symmetry around their ionizing stars. Velocity data combined with morphological properties suggest strongly that the nebulae were formed essentially by matter ejected from the central star and that ejection occurred preferentially from diametrially opposite regions on the star, that is, in a bi-polar fashion. The nebulae are discussed individually and a model for the ejection mechanism is presented.
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