Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.227..783s&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 227, Aug. 1, 1987, p. 783-795.
Astronomy and Astrophysics
Astronomy
1
Accretion Disks, Active Galactic Nuclei, X Ray Absorption, Compton Effect, Ionization Coefficients, Radiation Pressure
Scientific paper
It is shown that cool clouds can form in a Compton-heated wind when the flux decreases, and a model is developed which can predict flaring events and constrain the spectral shape. Sinusoidal flux variations of magnitude 10-100 are found to result in clouds for about 30 percent of the time, and flaring events lasting 25 percent of a 1000-(m8)yr period are shown to produce clouds for greater than about 75 percent of the time at radii of about 0.1-3 (m8)pc, with a covering factor close to unity. The values determined for the partial covering factors, absorption columns, and fraction of sources are consistent with the X-ray properties of low-luminosity AGN. It is suggested that cool clouds are accelerated by radiation pressure, and must be at least partially responsible for the observed broad-line properties.
No associations
LandOfFree
A link between X-ray variability and absorption in active galactic nuclei does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A link between X-ray variability and absorption in active galactic nuclei, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A link between X-ray variability and absorption in active galactic nuclei will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1341879