论文标题
向阿尔戈尔的新伴侣候选人打个招呼
Say hello to Algol's new companion candidates
论文作者
论文摘要
固定的轨道周期蚀二进制二进制物具有计算的Eclipse时期（C）。这些基于旧数据的胚层无法准确预测观察到的未来日食时期（O）。通过从O-C数据中删除线性或二次趋势可以提高可预测性。黯然失色的二进制系统中的其他伴侣会导致轻度旅行效应，这些效应被认为是严格的周期性O-C变化。最近，Hajdu等人。 （2019年）估计，从O-C数据中检测两个新伴侣的周期的概率仅为0.00005。我们将新的离散卡方方法（DCM）应用于黯淡的二进制Algol（$β$ Persei）的236年的O-C数据。我们检测到至少五个伴侣候选人的暂定信号，其周期为1.863至219.0岁。这五个信号中最弱的信号中最弱的一个没有透露“新”伴侣候选人，因为它的680.4美元\ pm 0.4 $ days信号期与$ 679.85 \ pm 0.04 $ 0.04 $ DAME $ DAME ORBITAL ALGOL〜C的$1.4σ$不同。我们从最初的226.2年的数据中检测到了相同的信号，并且在我们的数据的最后9.2年中，它们提供了出色的预测。 Algol〜C和新伴侣候选者的轨道平面可能是共同计划，因为Algol的Eclipses中没有观察到任何变化。自从Goodricke（1783）确定的2.867天轨道周期一直是恒定的。
Constant orbital period ephemerides of eclipsing binaries give the computed eclipse epochs (C). These ephemerides based on the old data can not accurately predict the observed future eclipse epochs (O). Predictability can be improved by removing linear or quadratic trends from the O-C data. Additional companions in an eclipsing binary system cause light-time travel effects that are observed as strictly periodic O-C changes. Recently, Hajdu et al. (2019) estimated that the probability for detecting the periods of two new companions from the O-C data is only 0.00005. We apply the new Discrete Chi-square Method (DCM) to 236 years of O-C data of the eclipsing binary Algol ($β$ Persei). We detect the tentative signals of at least five companion candidates having periods between 1.863 and 219.0 years. The weakest one of these five signals does not reveal a "new" companion candidate, because its $680.4 \pm 0.4$ days signal period differs only $1.4 σ$ from the well-known $679.85 \pm 0.04$ days orbital period of Algol~C. We detect these same signals also from the first 226.2 years of data, and they give an excellent prediction for the last 9.2 years of our data. The orbital planes of Algol~C and the new companion candidates are probably co-planar, because no changes have been observed in Algol's eclipses. The 2.867 days orbital period has been constant since it was determined by Goodricke (1783).
