Ben-Gurion University of the NegevAstrophysics and Cosmology GroupAstrophysics, Relativity, Cosmology, and Space Physics |
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Speaker: Doron Chelouche (U. Haifa) January 21, 2015 Towards better understanding of accretion phenomena in quasars Abstract: Quasars
are thought to be powered by gas accretion onto super- massive black
holes. While the notion of geometrically thin accretion disks is often
employed to qualitatively explain the properties of quasars, there is
little observational proof of it. In fact, there is growing evidence
that accretion may be a far richer phenomenon. This talk will review
recent progress in the field, and present new constraints on the size
of the optically emitting regions in low-luminosity sources. A new
robotic survey will be presented, which is designed to map the
innermost regions of hundreds of quasars with unprecedented accuracy.
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Last updated
by Uri Keshet,
2013 |