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We examine 1D two-temperature accretion flows around a supermassive blackhole, adopting the specific angular momentum \lambda, the total specific energy\epsilon and the input accretion rate \dot M_{input} = 4.0x10^{-6} solarmass/yr estimated in the recent analysis of stellar wind of nearby stars aroundSgr A*.  The two-temperature flow is almost adiabatic even if we take account of theheating of electrons by ions, the bremsstrahlung cooling and the synchrotroncooling, as long as the ratio \beta of the magnetic energy density to thethermal energy density is taken to be as \beta < 1. The different temperaturesof ions and electrons are caused by the different adiabatic indices of ions andelectrons which depend on their temperature states under the relativisticregime. The total luminosity increases with increasing \beta and results in -10^{35} - 10^{36} erg/s for \beta=10^{-3} - 1.  Furthermore, from 2D time-dependent hydrodynamical calculations of the aboveflow, we find that the irregularly oscillating shocks are formed in the innerregion and that the luminosity and the mass-outflow rate vary by a factor of 2-- 3 and 1.5 -- 4, respectively. The time variability may be relevant to theflare activity of Sgr A*.

Low angular momentum flow model II for Sgr A*