ar X iv : a st ro - p h / 01 07 11 9 v 2 2 7 N ov 2 00 1 Advection Dominated Accretion Flows around a Rotating Compact Object

Using the generalised set of fluid equations that include the ‘Coriolis force’ along with the centrifugal and pressure gradient forces, we have reanalysed the class of self similar solutions, with the pseudo-Newtonian potential. We find that the class of solutions is well behaved for almost the entire parameter space except for a few selected combinations of γ and α for the co-rotating flow. The analysis of the Bernoulli number shows that whereas it remains positive for co-rotating flow for f > 1/3, for the counter-rotating flow it does admit both positive and negative values, indicating the possibility of energy transfer in either direction. Subject headings: accretion flows – rotating compact object – perturbation