SIMBAD references

2009ApJ...698..840C - Astrophys. J., 698, 840-851 (2009/June-2)

Accretion disk model of short-timescale intermittent activity in young radio sources.

CZERNY B., SIEMIGINOWSKA A., JANIUK A., NIKIEL-WROCZYNSKI B. and STAWARZ L.

Abstract (from CDS):

We associate the existence of short-lived compact radio sources with the intermittent activity of the central engine caused by a radiation pressure instability within an accretion disk. Such objects may constitute a numerous subclass of gigahertz-peaked spectrum sources, in accordance with the population studies of radio-loud active galaxies, as well as detailed investigations of their radio morphologies. We perform the model computations assuming the viscosity parameterization as proportional to a geometrical mean of the total and gas pressure. The implied timescales are consistent with the observed ages of the sources. The duration of an active phase for a moderate accretion rate is short enough (less than 103-104 yr) that the ejecta are confined within the host galaxy and thus these sources cannot evolve into large size radio galaxies unless they are close to the Eddington limit.

Abstract Copyright:

Journal keyword(s): accretion, accretion disks - galaxies: active - instabilities

Simbad objects: 74

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2019.09.23-23:06:06

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