A mechanism for the ejection of relativistic jets from slim disks is studied. Since radiation pressure is dominant in the slim disk, radiative energy flows along the pressure gradient in the vertical direction. The divergence of the radiative flux tells us that the flow of radiative energy from a bottom layer near the equatorial plane is absorbed by another layer above the boundary surface. The absorbed energy accumulates in the upper layer as the matter advances inward, and calculations show that the specific energy of the flow in the upper layer can be as large as ∼c ² near the black hole when the accretion rate through the upper layer is relatively low. Since the specific energy ∼c ² is much larger than the gravitational energy, the height of the upper layer could significantly increase then. Hence, the innermost part of the upper layer after almost all the angular momentum has been removed could have a much greater height than the size of the black hole, and the flow could collide with itself around the central axis of the disk, bouncing back from the axis while simultaneously expanding along it. The flow is expected to go outward along the central axis and to become supersonic due to the change in its cross section, finally producing relativistic jets.

中文翻译：

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细长圆盘的相对论射流喷射


研究了从细长圆盘喷射相对论性喷流的机制。由于辐射压力在细长圆盘中占主导地位，因此辐射能量沿着垂直方向的压力梯度流动。辐射通量的发散告诉我们，来自赤道面附近底层的辐射能量流被边界表面上方的另一层吸收。随着物质向内推进，所吸收的能量在上层不断积累，计算表明，当吸积速率达到一定值时，黑洞附近上层流的比能可达到∼c ² 通过上层比较低。由于比能∼c ² 远大于重力能，因此上层的高度会显着增加。因此，在几乎所有角动量被移除后，上层的最内部部分的高度可能比黑洞的大小大得多，并且流动可能会围绕圆盘的中心轴与自身碰撞，从圆盘反弹回来。轴，同时沿其扩展。预计流动将沿着中心轴向外流动，并由于其横截面的变化而变成超音速，最终产生相对论性射流。