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Does Magnetic Levitation or Suspension Define the Masses of Forming Stars?
Frank H. Shu, Zhi-Yun Li, Anthony Allen
We investigate whether magnetic tension can define the masses of forming stars by holding up the subcritical envelope of a molecular cloud that suffers gravitational collapse of it…
Collapse of Magnetized Singular Isothermal Toroids: II. Rotation and Magnetic Braking
A. Allen, Z. Y. Li, F. H. Shu
We study numerically the collapse of rotating, magnetized molecular cloud cores, focusing on rotation and magnetic braking during the main accretion phase of isolated star formatio…
Collapse of Magnetized Singular Isothermal Toroids: I. Non-Rotating Case
A. Allen, F. H. Shu, Z. Y. Li
We study numerically the collapse of non-rotating, self-gravitating, magnetized, singular isothermal toroids characterized by sound speed, , and level of magnetic to thermal sup…
The Diversity of Gamma-Ray Bursts and the Surroundings of Massive Stars
Roger A. Chevalier, Zhi-Yun Li, Claes Fransson
The finding of a Type Ic supernova connected with GRB 030329 showed a massive star origin for this burst, supporting evidence for this association in previous bursts with lightcurv…
Magneto-Centrifugal Launching of Jets from Accretion Disks. II: Inner Disk-Driven Winds
Ruben Krasnopolsky, Zhi-Yun Li, Roger D. Blandford
We follow numerically the time evolution of axisymmetric outflows driven magneto-centrifugally from the inner portion of accretion disks, from their launching surface to large, obs…
Binary and Multiple Star Formation in Magnetic Clouds: Bar Growth and Fragmentation
Fumitaka Nakamura, Zhi-Yun Li
We study the non-axisymmetric evolution of magnetized clouds, using a 2D MHD code based on the physically motivated thin-disk approximation. We found that such clouds become unstab…