论文标题
二进制恒星接近合并的质量损失
Mass loss from binary stars approaching merger
论文作者
论文摘要
一些二进制恒星经历了共同的包膜演化，伴随着角动量，质量和轨道能的急剧损失，并且留下的近距离二进制物通常涉及至少一个白矮人，中子星或黑洞。普通信封的最佳研究阶段是动态的灵感持续很少的原始轨道时期。我们展示了对V1309 SCO和AT2018BWO观察结果的理论解释，揭示了在动态事件中，二进制群体经历了大量的延长质量损失。这种质量损失集中在轨道平面上，以流出或环形磁盘的形式集中。这种较慢的质量损失与随后的更快的动态弹出能力之间的碰撞会产生鲜红色的瞬变。产生的辐射冲击有助于塑造爆炸残留物，并提供灰尘和分子形成的位点。
Some binary stars experience common envelope evolution, which is accompanied by drastic loss of angular momentum, mass, and orbital energy and which leaves behind close binaries often involving at least one white dwarf, neutron star, or black hole. The best studied phase of common envelope is the dynamical inspiral lasting few original orbital periods. We show theoretical interpretation of observations of V1309 Sco and AT2018bwo revealing that binaries undergo substantial prolonged mass loss before the dynamical event amounting up to few solar masses. This mass loss is concentrated in the orbital plane in the form of an outflow or a circumbinary disk. Collision between this slower mass loss and the subsequent faster dynamical ejection powers a bright red transient. The resulting radiative shock helps to shape the explosion remnant and provides a site of dust and molecule formation.
