Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.215..417c&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 215, Aug. 1, 1985, p. 417-423.
Astronomy and Astrophysics
Astronomy
4
Active Galactic Nuclei, Stellar Mass Accretion, Active Galaxies, Luminosity, Power Spectra, Shot Noise
Scientific paper
If the source of accretion material in Active Galaxies is the stellar population in the nucleus then the accretion rate may be highly erratic and consist of a series of accretion events in which either a whole star, or a fraction of one is swallowed by the central black hole. These events would be randomly spaced in time, with the average event rate and the average mass per event corresponding to a few solar masses per year. By modelling the accretion as a shot noise process, an analysis of 2.8-cm flux monitoring data provides a means of estimating the event rate and the mass per event. The values obtained are broadly in agreement with the accretion-model predictions of AGN luminosity although the published data sets are not complete for every source. This formalism may suggest a method of analysing data from future coordinated observations of active galaxies in such a way that questions concerning the central engine may be answered.
Cruise A. M.
Dodds P. M.
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