Advection-dominated accretion flows: Low-luminosity objects can contain supermassive black holes! |
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| Institution: | 1. Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Beijing Information Science and Technology University, 6 Hongxia Road, Chaoyang District, Beijing 100015, China;2. Intelligent Human-Machine Systems Lab, College of Engineering, Northeastern University, 360 Huntington Ave., Boston, MA 02115, USA;3. School of Life Sciences, Beijing Institute of Technology, 5 Zhongguancun South Street, Haidian District, Beijing 100086, China |
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| Abstract: | A model of optically thin, advection-dominated accretion flows (ADAFs) has made rapid progress recently and attracted much attention now. It can nicely reproduce the observed spectra of Sgr A1 and other low-luminosity AGNs. We here review the unique properties of ADAFs, focusing on their emission properties and time-dependent behavior. The issues involved with ADAFs are also discussed. |
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