| 单词 | Common envelope |
| 释义 |
Common envelope
中文百科
共有包层![红巨星 (左边，红色) 充满了它的洛希瓣 (绿色破折线) 并且开始传输直量给主序星 (右边，黄色)。随着转移质量的吸积，大质量恒星的核心 (灰色) 和主序星都被吞噬近共有的包层内[1]。](/uploads/202501/05/Common_envelope_diagram.svg2523.png) ![A series of snapshots in the life of a binary star before mass transfer and during its common envelope evolution. The binary has a mass ratio M1/M2=3. The black line is the Roche equipotential surface. The CoM is the centre of mass of the binary system. (a) Shows the two stars with the relatively unevolved primary on the right (mass M1 in red) and the secondary on the left (mass M2 in orange). (b) Shows that as the primary evolves it grows in size. (c) Roche-lobe overflow: the primary fills its Roche lobe and transfers mass to the secondary. (d) The material cannot be accreted onto the secondary so it swells to fill the both Roche lobes. (e) A common envelope forms around both stars. Adapted by permission of the author from Fig. 1 of Izzard et al. (2012).[1]](/uploads/202501/05/Common_envelope.svg2523.png) 共有包层 (common envelope，CE) 归因于天文学的联星在发展过程中短期 (数月至数年) 的相变，两颗星中最大的一颗 (捐助者) 开始不稳定的将质量转移给伴星。当捐助星的半径更快速的扩张或是联星的轨道不是很快速的缩小，质量的传输是不稳定的。因此，当捐助星充满了洛希瓣，质量开始传输，并且恒星开始扩张而轨道因此缩小，导致更多的质量溢出洛希瓣，这加速了质量的传输，导致轨道收缩得更快，捐助者也膨胀得更快，等等。这会导致失控的动力学不稳定质量传输进程，结果是捐助星的包层将快速的膨胀，并吞噬掉伴星，因此才称为共有包层。
英语百科
Common envelope 共有包层In astronomy, a common envelope (CE) is gas that contains a binary star system. The gas does not rotate at the same rate as the embedded binary system. A system with such a configuration is said to be in a common envelope phase or undergoing common envelope evolution. |
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