论文标题
恒星脉动的时间安排在主要序列以外的子策略伴侣
Timing of stellar pulsations to search for sub-stellar companions beyond the main sequence
论文作者
论文摘要
（删节的）明星一生的大部分时间都花在主序（MS）上。但是它们最实质性的变化发生在MS阶段，无论是在MS前还是在MS阶段之前。由于非常复杂和多样化的动力学过程，行星系统的演变与MS行星系统的演变明显不同。 这项工作的重点是在MS Systems146中寻找子续签同伴，并确定其宿主恒星的进化状态，尤其是Subdwarf B Stars（SDB Stars）。规范模型涉及二元进化来解释SDB恒星的存在。对单个SDB的形成场景更具争议性。除了合并了两个氦白矮人或明显单个SDB恒星的其他合并过程外，替代的地层渠道还涉及行星系统。在红色巨型阶段，恒星将开发一个通用的封底W146，这是一个巨型行星，导致损失信封。因此，SDB恒星是测试行星如何生存和影响恒星进化的晚期的实验室。 SDB恒星的快速脉动可用于检测脉动最大化预期到达时间的周期性变化的亚遗迹伴侣。这种时序方法对大距离的同伴特别敏感，并且与其他系外行星检测方法互补。因此，定时方法从主机星来打开一个新的参数范围，并有助于理解单个SDB的形成过程。 在这项工作中，我实施，测试和应用了脉动定时分析，以搜索后期进化阶段恒星系统中的亚赛车伴侣。该方法已经在文献中建立，但不能在能够自动处理长期序列的高振动数据的程度，即从空间诞生的观测值中。
(abridged) Stars spend most of their life on the main sequence (MS). But their most substantial changes occur off the MS stage, either before on the pre-MS or beyond at the post-MS phase. Due to very complex and varied dynamical processes, the evolution of planetary systems orbiting non-MS stars significantly differs from those of MS planetary systems. This work focusses on the search for sub-stellar companions in post-MS systems146 and determination of the evolutionary state of their host stars, especially subdwarf B stars (sdB stars). The canonical model involves binary evolution to explain the existence of sdB stars. Formation scenarios for single sdBs are more controversially discussed. Besides the merger of two helium white dwarfs or other merger processes for apparently single sdB stars, an alternative formation channel involves planetary systems. During the red giant phase, the star would develop a common envelope w146ith a giant planet that leads to the loss of the envelope. Thus, sdB stars are laboratories to test how planets survive and influence the late phases of stellar evolution. The rapid pulsations of sdB stars can be used to detect sub-stellar companions from periodic variations in the expected arrival times of the pulsation maxima. This timing method is particularly sensitive to companions at large distances and complementary to other exoplanet detection methods. Thus, the timing method opens up a new parameter range in terms of the host stars and helps to understand the formation process of single sdBs. In this work I implemented, tested and applied the pulsation timing analysis to search for sub-stellar companions in late evolutionary stage stellar systems. The method is already established in the literature but not to an extent which is capable of automatically processing long-time series of high-cadence data, i.e., from space born observations.
