In modeling strong gravitational lens systems, one often adopts simple
models, such as singular isothermal elliptical density plus lowest-order
external perturbation. However, such simple models may mislead us if the real
mass distribution is more...
Yoshiaki Taniguchi,Yasuhiro Shioya,Takeshi G. Tsuru,Satoru Ikeuchi
2000年2月
Recent high-resolution X-ray imaging studies have discovered possible
candidates of intermediate-mass black holes with masses of in circumnuclear regions of many (disk) galaxies. It is known
that a large number of mas...
The effects of the UV background radiation on the formation of sub-galactic
clouds are studied by means of one-dimensional hydrodynamical simulations. The
radiative transfer of the ionizing photons due to the absorption by HI, HeI and
HeII, neglec...
We investigate whether or not a supermassive black hole (SMBH) with mass can be made in the heart of ultraluminous infrared
galaxies (ULIGs) during the course of mergers between/among gas rich galaxies.
(a) If one progenitor...
(ABRIDGED)The Ly clouds at low redshifts (z < 1.7)observed by
HST showed us two unexpected features: Lanzetta et.al.establised the
association between Ly clouds and galaxies, and Ulmer pointed out the
strong clustering of Ly$\alpha...
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