Zobrazeno 1 - 10
of 73
pro vyhledávání: '"Teresi, V."'
Publikováno v:
Mon.Not.Roy.Astron.Soc.377:1431-1438,2007
We numerically examine centrifugally supported shock waves in 2D rotating accretion flows around a stellar-mass (10M_sun) and a supermassive (10^6M_sun) black holes over a wide range of input accretion rates of 10^7 >\dot M/\dot M_E>10^{-4}. The resu
Externí odkaz:
http://arxiv.org/abs/astro-ph/0703465
Publikováno v:
Mon.Not.Roy.Astron.Soc.365:1405,2006
We discuss a special case of formation of axisymmetric shocks in the accretion flow of ideal gas onto a Schwarzschild black hole: when the total energy of the flow is negative. The result of our analysis enlarges the parameter space for which these s
Externí odkaz:
http://arxiv.org/abs/astro-ph/0511312
Publikováno v:
Astrophys.J.643:222-225,2006
We present a simple physical model of the central source emission in the M87 galaxy. It is well known that the observed X-ray luminosity from this galactic nucleus is much lower than the predicted one, if a standard radiative efficiency is assumed. U
Externí odkaz:
http://arxiv.org/abs/astro-ph/0509670
We present the simulation of 3D time dependent flow of rotating ideal gas falling into a Schwarzschild black hole. It is shown that also in the 3D case steady shocks are formed in a wide range of parameters (initial angular momentum and thermal energ
Externí odkaz:
http://arxiv.org/abs/astro-ph/0501549
Publikováno v:
Mon.Not.Roy.Astron.Soc. 357 (2005) 295-303
Super-Eddington accretion discs with 3 and 15 dot M_E around black holes with mass 10 M_sun are examined by two-dimensional radiation hydrodynamical calculations extending from the inner disc edge to 5*10^4 r_g and lasting up to \sim 10^6 r_g/c. The
Externí odkaz:
http://arxiv.org/abs/astro-ph/0411743
It is well known that the rotating inviscid accretion flows with adequate injection parameters around black holes could form shock waves close to the black holes, after the flow passes through the outer sonic point and can be virtually stopped by the
Externí odkaz:
http://arxiv.org/abs/astro-ph/0403115
Publikováno v:
Mon.Not.Roy.Astron.Soc.351:297,2004
We show that accretion disks, both in the subcritical and supercritical accretion rate regime, may exhibit significant amplitude luminosity oscillations. The luminosity time behavior has been obtained by performing a set of time-dependent 2D SPH simu
Externí odkaz:
http://arxiv.org/abs/astro-ph/0309094
Publikováno v:
Mon.Not.Roy.Astron.Soc.348:361,2004
We show that a standard Shakura-Sunyaev accretion disc around a black hole with an accretion rate lower than the critical Eddington limit does show the instability in the radiation pressure dominated zone. We obtain this result performing time-depend
Externí odkaz:
http://arxiv.org/abs/astro-ph/0307480
Akademický článek
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Akademický článek
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