Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985avest..19..101r&link_type=abstract
(Astronomicheskii Vestnik, vol. 19, Apr.-June 1985, p. 101-112) Solar System Research (ISSN 0038-0946), vol. 19, no. 2, Oct. 198
Astronomy and Astrophysics
Astronomy
2
Interstellar Gas, Molecular Clouds, Solar Wind, Stellar Evolution, Stellar Magnetic Fields, Angular Momentum, Cosmic Rays, Gyrofrequency, Ionic Collisions, Ionized Gases, Molecular Collisions, Nebulae, Stellar Mass Accretion
Scientific paper
An analytical investigation is carried out of the evolution of the magnetic field in the weakly ionized gas of a protosolar nebula with one solar mass and an angular momentum of 10 to the 52nd g-sq cm/sec during collapse. The evolution of the field is traced up to the formation of a quasi-equilibrium core, i.e., the solar embryo, and estimates are made of the magnetic field strength at the core and in the envelope during the following accretion stage. It is shown that a nonturbulent core and an ionization rate under 10 to the -20th/sec will permit the field to be strong enough to move angular momentum from the core center to its surface at a rate faster than the rate of accretion. The effect is to set a limit to the rotation rate of the core, thereby allowing a differentially rotating disk to form and further redistribute the angular momentum.
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