Počet záznamů: 1
Secular theory of the orbital evolution of the young stellar disc in the Galactic Centre
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SYSNO ASEP 0437044 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Secular theory of the orbital evolution of the young stellar disc in the Galactic Centre Tvůrce(i) Haas, J. (CZ)
Šubr, Ladislav (ASU-R)
Vokrouhlický, D. (CZ)Zdroj.dok. Monthly Notices of the Royal Astronomical Society. - : Oxford University Press - ISSN 0035-8711
-, č. 416 (2011), s. 1023-1032Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova massive black-hole ; cluster ; stars Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika CEP GA205/07/0052 GA ČR - Grantová agentura ČR CEZ AV0Z10030501 - ASU-R (2005-2011) UT WOS 000295119900016 DOI 10.1111/j.1365-2966.2011.19100.x Anotace We investigate the orbital evolution of a system of N mutually interacting stars on initially circular orbits around the dominating central mass. We include the perturbative influence of a distant axisymmetric source and an extended spherical potential. In particular, we focus on the case when the secular evolution of orbital eccentricities is suppressed by the spherical perturbation. By means of standard perturbation methods, we derive semi-analytic formulae for the evolution of normal vectors of the individual orbits. We find its two qualitatively different modes. Either the orbits interact strongly and, under such circumstances, become dynamically coupled, precessing synchronously in the potential of the axisymmetric perturbation, or, if their mutual interaction is weaker, the orbits precess independently, interchanging periodically their angular momentum, which leads to oscillations of inclinations. We argue that these processes may have been fundamental to the evolution of the disc of young stars orbiting the supermassive black hole in the centre of the Milky Way. Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2015
Počet záznamů: 1