The angular momentum problem and magnetic braking - an exact time-dependent solution

Details The angular momentum problem and magnetic braking - an exact time-dependent solution The angular momentum problem and magnetic braking - an exact time-dependent solution

May 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...230..204m&link_type=abstract

Astrophysical Journal, Part 1, vol. 230, May 15, 1979, p. 204-222.

Computer Science

Numerical Analysis

119

Angular Momentum, Astrophysics, Interstellar Gas, Plasma Clouds, Angular Velocity, Cosmic Rays, Equations Of Motion, Graphs (Charts), Interstellar Magnetic Fields, Magnetohydrodynamic Waves, Numerical Analysis, Time Dependence

Scientific paper

A problem in which angular momentum is transported away from a model cloud by hydromagnetic waves is formulated, put in dimensionless form, and solved for the case where the angular-momentum and magnetic-field vectors are mutually perpendicular. Exact time-dependent solutions for the angular velocity of the cloud as a whole and the external medium are obtained, and the magnetic field is determined. Results are presented for four values of the ratio between the densities of the cloud and the external medium. It is concluded that: (1) magnetic braking in the case considered can reduce the angular momentum of an interstellar cloud by at least a few orders of magnitude in a time less than 1 million yr; (2) the efficiency of magnetic braking in this case is much higher than in the case where the angular-momentum and magnetic-field vectors are parallel; and (3) the energy for cosmic-ray acceleration could come from the gravitational potential energy of interstellar clouds.

Affiliated with

Also associated with

No associations

Rating

The angular momentum problem and magnetic braking - an exact time-dependent solution does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The angular momentum problem and magnetic braking - an exact time-dependent solution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The angular momentum problem and magnetic braking - an exact time-dependent solution will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1701980