Numerical Simulations of Self-Gravitating Magnetized Disks
نویسندگان
چکیده
منابع مشابه
Numerical Simulations of Self-gravitating Magnetized Disks
We present the first global simulations of self-gravitating magnetized tori. The simulations are performed with Zeus-2D and GLOBAL. We find the magne-torotational instability (MRI) to behave similarly in a self-gravitating environment as in previous simulations of non self-gravitating systems: enhancement of turbulent angular momentum transport follows the linear phase. The torus quickly develo...
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In this paper and a companion work, we report on the first global numerical simulations of self-gravitating magnetized tori, subject in particular to the influence of the magnetorotational instability (MRI). In this work, paper I, we restrict our calculations to the study of the axisymmetric evolution of such tori. Our goals are twofold: (1) to investigate how self-gravity influences the global...
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We define three requirements for accurate simulations that attempt to model circumstellar disks and the formation of collapsed objects (e.g. planets) within them. First, we define a resolution requirement based on the wavelength for neutral stability of self gravitating waves in the disk, where a Jeans analysis does not apply. For particle based or grid based simulations, this criterion takes t...
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We study the evolution of self-gravitating, but stable, tori under the influence of the magnetorotational instability (MRI) by means of 2D MHD numerical simulations performed with Zeus-2D. We find the behaviour of the MRI to be similar in a selfgravitating disk and in a zero mass disk: the linear growth is followed by a turbulent phase during which angular momentum is transported outward. Self-...
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Vortices are believed to greatly help the formation of km sized planetesimals by collecting dust particles in their centers. However, vortex dynamics is commonly studied in non-selfgravitating disks. The main goal here is to examine the effects of disk self-gravity on the vortex dynamics via numerical simulations. In the self-gravitating case, when quasi-steady gravitoturbulent state is reached...
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ژورنال
عنوان ژورنال: Astrophysics and Space Science
سال: 2004
ISSN: 0004-640X
DOI: 10.1023/b:astr.0000045047.52968.a2