V1487 Aql/GRS 1915+105双星施主的质量、光度和质量损失率
The mass, luminosity and mass-loss rate of the donor of the V1487 Aql/GRS 1915+105 binary system
摘要：
微类星体GRS 1915+105的施主是一个低质量的巨星。这样的恒星由一个简并的氦核和一个富氢的外壳组成。这两个组件由氢燃烧外壳隔开。这种物体的结构相对简单，易于建模。利用观测到的施主恒星的光度和半径的约束条件，我们用演化模型来约束该恒星的质量。我们发现，从这些模型的约束，从观察到的旋转加宽和近红外幅度之间有很好的协议。结合约束条件，我们找到的解决方案与剥离巨人的质量$\geq\!0.28{\rm M}_{\odot}$和光谱类K5 III，独立的距离系统，和距离相关的上限，$\lesssim\!1{\rm M}_{\odot}$。我们还计算了平均传质速率和系统的占空比作为供体质量的函数。这一比率远低于临界比率（系统将在该比率上持续存在），工作周期不到20%。
英文摘要：
The donor in the microquasar GRS 1915+105 is a low-mass giant. Such a star consists of a degenerate helium core and a hydrogen-rich envelope. Both components are separated by a hydrogen burning shell. The structure of such an object is relatively simple and easy to model. Making use of the observational constraints on the luminosity and the radius of the donor, we constrain the mass of this star with evolutionary models. We find a very good agreement between the constraints from those models and from the observed rotational broadening and the NIR magnitude. Combining the constraints, we find solutions with stripped giants of the mass of $\geq\!0.28{\rm M}_{\odot}$ and of the spectral class K5 III, independent of the distance to the system, and a distance-dependent upper limit, $\lesssim\!1{\rm M}_{\odot}$. We also calculate the average mass transfer rate and the duty cycle of the system as a function of the donor mass. This rate is much below the critical rate (at which the system would become persistent), and the duty cycle is less than 20 per cent.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
