We investigate the competitive rôle of rotational and gravitational energy during the process of mass and angular momentum loss from a non-collapsed supermassive (108M ⊙ M⊙ ) 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 × 109 years of a parameter, χ, related to the ratio of rotational to gravitational energy. The model computations show that the parameter χ 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. We conclude that non-collapsed supermassive rotators may be temporary stages (lasting some billion years) in the evolutionary process of AGN, whose ultimate fate should be the gravitational collapse towards a supermassive black hole.
Mass and angular momentum loss by AGN wind and the fate of supermassive rotators
Belvedere, G.;Paterno, L.;Pidatella, R. M.
1989-01-01
Abstract
We investigate the competitive rôle of rotational and gravitational energy during the process of mass and angular momentum loss from a non-collapsed supermassive (108M ⊙ M⊙ ) 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 × 109 years of a parameter, χ, related to the ratio of rotational to gravitational energy. The model computations show that the parameter χ 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. We conclude that non-collapsed supermassive rotators may be temporary stages (lasting some billion years) in the evolutionary process of AGN, whose ultimate fate should be the gravitational collapse towards a supermassive black hole.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
