Реферат: Planetary systems form in gas–dust protoplanetary discs via the growth of solid bodies. In this paper, we show that the most intriguing stage of such growth, namely the transformation of 1–10 m boulders into kilometre-sized planetesimals, can be explained by a mechanism of gravitational instability. The present work focused on the origin of self-gravitating clumps in which planetesimal formation could take place. Our computer simulations demonstrated that such clumps of gas and boulders formed due to the development of a two-phase instability. This instability revealed a so-called ‘mutual influence effect’ in the protoplanetary disc, where the dynamics of the system were determined by the collisionless collective motion of a low-mass subdisc composed of primary solids. We found that a 0.1cs velocity dispersion in the boulder subdisc was sufficient to cause the formation of self-gravitating clumps of gas and boulders. In such regimes, the time needed for the formation of the collapsing objects was less than the boulders’ dissipation time in the density waves of the medium.

Библиографическая ссылка: Snytnikov V.N. , Stoyanovskaya O.P.
Clump Formation Due to the Gravitational Instability of a Multiphase Medium in a Massive Protoplanetary Disc
Monthly Notices of the Royal Astronomical Society. 2013. V.428. N1. P.2-12. DOI: 10.1093/mnras/sts002 WOS Scopus РИНЦ OpenAlex

Файлы: Полный текст от издателя

Даты:

Поступила в редакцию:	29 июл. 2011 г.
Принята к публикации:	13 сент. 2012 г.
Опубликована online:	23 окт. 2012 г.
Опубликована в печати:	1 янв. 2013 г.

Идентификаторы БД:

Web of science:	WOS:000318227900011
Scopus:	2-s2.0-84872370782
РИНЦ:	20418968
OpenAlex:	W2143890322

Цитирование в БД:

БД	Цитирований
Web of science	6
Scopus	7
РИНЦ	13
OpenAlex	12

Альметрики: