Accretion during binary star formation -- I. Ballistic accretion
نویسندگان
چکیده
منابع مشابه
Planetesimal accretion in binary star systems
Numerical simulations of planetesimal accretion in circumprimary and circumbinary orbits are described. The secular perturbations by the companion star and gas drag are included in our models. We derive limits on the parameters of the binary system for which accretion and then planetary formation are possible. In the circumbinary case we also outline the radial distance from the baricenter of t...
متن کاملMagnetically-controled Spasmodic Accretion during Star Formation: Ii. Results
The problem of the late accretion phase of the evolution of an axisymmetric, isothermal magnetic disk surrounding a forming star has been formulated in a companion paper. The “central sink approximation” is used to circumvent the problem of describing the evolution inside the opaque central region for densities greater than 10 cm and radii smaller than a few AUs. Only the electrons are assumed ...
متن کاملCritical Accretion Rate for Triggered Star Formation
We have reexamined the similarity solution for a self-gravitating isothermal gas sphere and examined implication to star formation in a turbulent cloud. When parameters are adequately chosen, the similarity solution expresses an accreting isothermal gas sphere bounded by a spherical shock wave. The mass and radius of the sphere increases in proportion to the time, while the central density decr...
متن کاملMagnetically-controled Spasmodic Accretion during Star Formation: I. Formulation of the Problem and Method of Solution
We formulate the problem of the late accretion phase of the evolution of an isothermal magnetic disk surrounding a forming star. The evolution is described by the six-fluid MHD equations, accounting for the presence of neutrals, atomic & molecular ions, electrons, and neutral, positively and negatively charged grains. Only the electron fluid is assumed to be attached to the magnetic field, in o...
متن کاملMagnetically-controlled Spasmodic Accretion during Star Formation: I. Formulation of the Problem and Method of Solution
We formulate the problem of the late accretion phase of the evolution of an isothermal magnetic disk surrounding a forming star. The evolution is described by the six-fluid MHD equations, accounting for the presence of neutrals, atomic & molecular ions, electrons, and neutral, positively and negatively charged grains. Only the electron fluid is assumed to be attached to the magnetic field, in o...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1997
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/285.1.16