Statistics – Computation
Scientific paper
Apr 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.237..827b&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 237, April 1, 1989, p. 827-833.
Statistics
Computation
4
Active Galactic Nuclei, Stellar Mass Ejection, Stellar Winds, Supermassive Stars, Angular Momentum, Cosmic Plasma, Galactic Rotation, Gravitational Collapse, Stellar Evolution
Scientific paper
This paper investigates the competitive role of rotational and gravitational energy during the process of mass and angular momentum loss from a noncollapsed supermassive (10 to the 8th solar masses) rotating magnetoid by magnetically driven AGN wind in the framework of a simple coronal model. This is done following the evolution over a time interval of 3.25 x 10 to the 9th years of a parameter, chi, related to the ratio of rotational to gravitational energy. The model computations show that the parameter chi decreases monotonically in time, indicating that the release of rotational energy goes faster than the release of gravitational energy in the process of mass and angular momentum loss. It is concluded that noncollapsed supermassive rotators may be temporary stages (lasting some billion years) in the evolutionary process of AGN, whose ultimate fate should be the gravitational collapse toward a supermassive black hole.
Belvedere Gaetano
Paterno' Lucio
Pidatella R. M.
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