منابع مشابه
BREAKING THROUGH EDITORIAL Satellites , Spinning Disks , and Textbooks
In this issue we offer our readers an assortment of articles on various topics. Starting with our first article, Dr. Ruyong Wang challenges the relativistic physicists to an experimental show-down. In [1] he states: “. . .please don’t try to make the light-speed constancy un-definable. If you care to define that the speed of light is the same for any moving observer, we will design a GPS experi...
متن کاملThe System of Two Spinning Disks in the Torus
We study the system of two spinning disks in the torus. We show how to reduce this nonhamiltonian system to a 3 dimensional measure preserving reversible map. We establish that, in contrast to the case of elastic collisions, this system may have periodic orbits with all Floquet exponents on the unit circle. We would like to thank Eugene Gutkin and Dave Levermore for helpful and enlightening dis...
متن کاملOn the existence of chaotic circumferential waves in spinning disks.
We use a third-order perturbation theory and Melnikov's method to prove the existence of chaos in spinning circular disks subject to a lateral point load. We show that the emergence of transverse homoclinic and heteroclinic points lead, respectively, to a random reversal in the traveling direction of circumferential waves and a random phase shift of magnitude pi for both forward and backward wa...
متن کاملNeutrino-cooled Accretion Disks around Spinning Black Holes
Abstract. We calculate the structure of accretion disk around a spinning black hole for accretion rates Ṁ = 0.01− 10M⊙ s−1. The model is fully relativistic and treats accurately the disk microphysics including neutrino emissivity, opacity, electron degeneracy, and nuclear composition. We find that the accretion flow always regulates itself to a mildly degenerate state with the protonto-nucleon ...
متن کاملAlignment of magnetized accretion disks and relativistic jets with spinning black holes.
Accreting black holes (BHs) produce intense radiation and powerful relativistic jets, which are affected by the BH's spin magnitude and direction. Although thin disks might align with the BH spin axis via the Bardeen-Petterson effect, this does not apply to jet systems with thick disks. We used fully three-dimensional general relativistic magnetohydrodynamical simulations to study accreting BHs...
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ژورنال
عنوان ژورنال: Nature
سال: 1891
ISSN: 0028-0836,1476-4687
DOI: 10.1038/043514a0