Convection-dominated accretion flows (CDAFs) are expected to have a shallower density profile and a higher radiation efficiency compared to advection-dominated accretion flows (ADAFs). Both solutions have been developed to account for the observed properties of the low-luminosity, high-temperature X-ray sources believed to involve accretion onto massive black holes. Self-similar CDAFs also have steeper poloidal density gradients and temperatures close to the virial temperature. All these characteristics make CDAFs more capable of producing polar outflows driven by Compton heating as compared to other classical accretion disks. We investigate the conditions for producing such outflows in CDAFs and look for the mass accretion rate or, equally, the luminosity of CDAFs for which such outflows will exist. When the electron temperature saturates around 10~(11) K at the inner region, polar outflows are probable for 8 x 10~(-7) approx< L/L_E approx< 4 x 10~(-5), where L_E is the Eddington luminosity. Outflows are well collimated with small opening angles. The luminosity range for which outflow solutions exist is narrower for lower electron temperature flows and disappears completely for electron temperature approx< 6 x 10~9 K. When the magnetic field is present, we find that outflows are possible if the magnetic field is less than from 10% to 1% of the equipartition field. We also find that outflows are more likely to be produced when the viscosity parameter α is small. The tendency for jetlike collimated outflows to result from these solutions is presumably astrophysically relevant given the high frequency of jets from active galactic nuclei.
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机译：与以对流为主的吸积流（ADAF）相比，以对流为主的吸积流（CDAF）有望具有更浅的密度分布和更高的辐射效率。已经开发了两种解决方案，以解决观察到的低发光度，高温X射线源的特性，这些特性被认为会在大量黑洞上积聚。自相似的CDAF也具有较陡的多倍体密度梯度和接近病毒温度的温度。与其他经典吸积盘相比，所有这些特性使CDAF更有能力产生由康普顿加热驱动的极性流出。我们调查了在CDAFs中产生此类流出物的条件，并寻找存在此类流出物的质量增加率或CDAFs的发光度。当电子温度在内部区域达到10〜（11）K左右时，极性流出可能发生在8 x 10〜（-7）大约展开▼
