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The Subaru Seminar is usually held in Room 104 of the Hilo Base Facility, adjacent to the main lobby. Everyone is welcome to attend. If you are interested in giving a seminar, please contact Subaru seminar organizers (Tae-Soo Pyo, Sherry Yeh, Nagayoshi Ohashi) by email : (please change"_at" to @).

December 9, Tuesday 11:00 am, 104A

" Radiation Hydrodynamic Simulations of Line-Driven Disk Winds "

Mariko Nomura


Blueshifted absorption lines in the spectra suggest the existence of the outflows in active galactic nuclei (AGNs). Using two-dimensional radiation hydrodynamic simulations, we investigate the origin of the outflows. We found that the radiation force due to the spectral lines generates strong winds (line-driven disk winds) that are launched from the inner region of accretion disks (~ 30 Schwarzschild radii). In a wide range of black hole masses and Eddington ratios, funnel-shaped disk winds appear, in which dense matter is accelerated outward with an opening angle of ~70-80 degrees and with 10% of the light speed. We find that the line-driven winds reproduce the velocity, the column density, and the ionization state of Ultra Fast Outflows (UFOs), which is one of typical outflows in AGNs.

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