Date:
Tue, 22/11/201612:30-13:30
Location:
Kaplun building, Room No. 200
Lecturer: Mr. Chi Ho (Edwin) Chan
Affiliation:
Department of Physics and Astronomy,
Johns Hopkins University
Abstract:
Substantial evidence points to dusty,
geometrically thick tori obscuring the
central engines of AGNs, but so far no
mechanism satisfactorily explains why
cool dust in the torus remains in a puffy
geometry. IR and UV radiation pressure
on dust can play a significant role in
shaping the torus, yet the separation of
hydrodynamic evolution from radiative
transfer in previous work on radiation-
supported tori precluded a self-consistent
picture. Here we present the first three-
dimensional radiative hydrodynamics and
magnetohydrodynamics simulations of
dusty AGN tori subject to point-source UV
and diffuse IR radiative acceleration. Our
simulations are distinguished by their use
of high-quality radiative transfer for both
IR and UV radiation. We discuss the
implications of our results for torus
morphology and dynamics, for the
kinematics of torus inflows and outflows,
as well as for AGN obscuration.
Additional details of the upcoming Astrophysics'
seminars can be found on the following link.
האירוע הזה כולל שיחת וידאו ב-Google Hangouts.
הצטרף: https://plus.google.com/hangouts/_/mail.huji.ac.il/astrophysics?hceid=bWFpbC5odWppLmFjLmlsX2c0czhydDlpcmhwZzRvdGNybWIzZGFqcjdvQGdyb3VwLmNhbGVuZGFyLmdvb2dsZS5jb20.ctr3podehnvq1v05l9mqt936s4&hs=121