The decay of globular clusters to the centre of their mother galaxy corresponds to carrying a quantity of mass sufficient to sustain the gravitational activity of a small pre-existing nucleus and to accrete it in a significant way. This is due to both dynamical friction of field stars and tidal disruption by the compact nucleus. The results of the simplified model presented here show that the active galactic nuclei luminosity and lifetime depend on the characteristics of the globular cluster system and are quite insensitive to the nucleus' initial mass.
Galactic nuclei activity sustained by globular cluster mass accretion / CAPUZZO DOLCETTA, Roberto Angelo; Miocchi, Paolo. - In: PLANETARY AND SPACE SCIENCE. - ISSN 0032-0633. - STAMPA. - 46:(1998), pp. 1579-1581. (Intervento presentato al convegno Second Italian Meeting on Celestial Mechanics tenutosi a L'Aquila (Italy) nel 21-24 April 1997) [10.1016/S0032-0633(97)00209-2].
Galactic nuclei activity sustained by globular cluster mass accretion.
CAPUZZO DOLCETTA, Roberto Angelo
;MIOCCHI, PAOLO
1998
Abstract
The decay of globular clusters to the centre of their mother galaxy corresponds to carrying a quantity of mass sufficient to sustain the gravitational activity of a small pre-existing nucleus and to accrete it in a significant way. This is due to both dynamical friction of field stars and tidal disruption by the compact nucleus. The results of the simplified model presented here show that the active galactic nuclei luminosity and lifetime depend on the characteristics of the globular cluster system and are quite insensitive to the nucleus' initial mass.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
