9 papers · 1 filter
The Challenge of Sub-Keplerian Rotation for Disk Winds
Frank H. Shu, Susana Lizano, Daniele Galli +2
Strong magnetization makes the disks surrounding young stellar objects rotate at rates that are too sub-Keplerian to enable the thermal launching of disk winds from their surfaces…
Monitoring the Large Proper Motions of Radio Sources in the Orion BN/KL Region
Laura Gomez, Luis F. Rodriguez, Laurent Loinard +4
We present absolute astrometry of four radio sources in the Becklin-Neugebauer/Kleinman-Low (BN/KL) region, derived from archival data (taken in 1991, 1995, and 2000) as well as fr…
Formation of OB Associations in Galaxies
Frank H. Shu, Ronald J. Allen, Susana Lizano +1
We consider the formation of OB associations from two perspectives: (a) the fractional gas consumption in star formation,epsilon, per dynamical time scale t_dyn in a galaxy, and (b…
Mean-Field Magnetohydrodynamics of Accretion Disks
Frank H. Shu, Daniele Galli, Susana Lizano +2
We consider the accretion process in a disk with magnetic fields that are dragged in from the interstellar medium by gravitational collapse. Two diffusive processes are at work in…
Gravitational collapse of magnetized clouds II. The role of Ohmic dissipation
F. H. Shu, D. Galli, S. Lizano +1
We formulate the problem of magnetic field dissipation during the accretion phase of low-mass star formation, and we carry out the first step of an iterative solution procedure by…
Gravitational collapse of magnetized clouds. I. Ideal MHD accretion flow
D. Galli, S. Lizano, F. H. Shu +1
We study the self-similar collapse of an isothermal magnetized rotating cloud in the ideal magnetohydrodynamic (MHD) regime. In the limit of small distance from the accreting proto…