Accretion disk warping by resonant relaxation: The case of maser disk NGC4258

Details Accretion disk warping by resonant relaxation: The case of maser disk NGC4258 Accretion disk warping by resonant relaxation: The case of maser disk NGC4258

2009-03-11

arxiv.org/abs/0903.2051v2

Astrophys.J.700:L192-L195,2009

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

4 pp, 2 figures

Scientific paper

10.1088/0004-637X/700/2/L192

The maser disk around the massive black hole (MBH) in active galaxy NGC 4258 exhibits an O(10 deg) warp on the O(0.1 pc) scale. The physics driving the warp are still debated. Suggested mechanisms include torquing by relativistic frame dragging or by radiation pressure. We propose here a new warping mechanism: resonant torquing of the disk by stars in the dense cusp around the MBH. We show that resonant torquing can induce such a warp over a wide range of observed and deduced physical parameters of the maser disk.

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