On the possibility of detecting ultrashort period exoplanets with LISA
On the possibility of detecting ultrashort period exoplanets with LISA
复制标题
DOI：
10.1093/mnrasl/sly208
复制
发表时间：
2018-08
影响因子：
--
通讯作者：
Ka-wah Wong;E. Berti;W. Gabella;K. Holley-Bockelmann
中科院分区：
文献类型：
--
作者：
Ka-wah Wong;E. Berti;W. Gabella;K. Holley-Bockelmann
Cunha等人。(2018)最近重新研究了探测系外行星引力波的可能性，声称三个超短周期系统将被LISA观测到。我们重新审视了他们的分析，得出的结论是，即使假设LISA的观测时间为$T_{\rMobs}=4$Yars，目前已知的系外系也不太可能被探测到。关于其中一个系统GP Com b的可探测性的结论，将需要更好地了解该系统的特性，以及对LISA的反应和星系混淆噪声进行更仔细的建模。尽管如此，利用LISA探测系外行星的可能性足够有趣，值得进一步研究，因为引力波可能会产生难以用电磁观测约束的动力学性质。
Cunha et al. (2018) recently reexamined the possibility of detecting gravitational waves from exoplanets, claiming that three ultra-short period systems would be observable by LISA. We revisit their analysis and conclude that the currently known exoplanetary systems are unlikely to be detectable, even assuming a LISA observation time $T_{\rm obs}=4$ yrs. Conclusive statements on the detectability of one of these systems, GP Com b, will require better knowledge of the system's properties, as well as more careful modeling of both LISA's response and the galactic confusion noise. Still, the possibility of exoplanet detection with LISA is interesting enough to warrant further study, as gravitational waves could yield dynamical properties that are difficult to constrain with electromagnetic observations.