ON THE DISAPPEARANCE OF THE BROAD-LINE REGION IN LOW-LUMINOSITY ACTIVE GALACTIC NUCLEI
Journal Article
·
· Astrophysical Journal (Online)
- Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506-0055 (United States)
The disk-wind scenario for the broad-line region (BLR) and toroidal obscuration in active galactic nuclei (AGNs) predicts the disappearance of the BLR at low luminosities. In accordance with the model predictions, data from a nearly complete sample of nearby AGNs show that the BLR disappears at luminosities lower than 5 x 10{sup 39}(M/10{sup 7} M{sub sun}){sup 2/3} ergs{sup -1}, where M is the black hole mass. The radiative efficiency of accretion onto the black hole is {approx}<10{sup -3} for these sources, indicating that their accretion is advection-dominated.
- OSTI ID:
- 21319542
- Journal Information:
- Astrophysical Journal (Online), Journal Name: Astrophysical Journal (Online) Journal Issue: 2 Vol. 701; ISSN 1538-4357
- Country of Publication:
- United States
- Language:
- English
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