ON EQUILIBRIUM FIGURES OF PARTICLE CLOUDS AROUND THE SUN AND STARSстатья
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Дата последнего поиска статьи во внешних источниках: 23 марта 2017 г.
Аннотация:Abstract. Equilibrium ¯gures of cold gas{dust (or cometary) clouds are
studied in a more general setting than the classical Roche problem. The cloud
is considered to be under the in°uence of gravitational attraction of the central
star and the tidal ¯eld of the Galaxy. Our analysis also takes into account
the centrifugal forces due to the rotation of the cloud, which moves around the
center of the stellar system together with the star. The limit equilibrium ¯gure
is found to have three planes of symmetry and to be shaped like a \lemon"
with lateral swellings and two singular points. The shape of this ¯gure and
its cusp angles in the planes of two main sections are calculated. The average
density inside the equilibrium ¯gure is shown to be almost exactly equal to the
average density of matter in the Galaxy. This coincidence cannot be accidental
and means that equilibrium ¯gures with the critical level of the total surface
potential ¯ll the entire volume of the Galaxy. A possible consequence is that
the cometary clouds of neighboring stars in the Galaxy may touch each other
(or even intersect because of the presence of dark matter). Hence stars may
exchange comets and part of the comets in the Solar System may belong to
other stars.