论文标题
部分可观测时空混沌系统的无模型预测
Pulsating B stars in the Scorpius-Centaurus Association with TESS
论文作者
论文摘要
我们使用NASA苔丝任务中的数据研究位于天蝎座 - 核协会中的119 B星。我们在整个有效温度范围内看到81颗恒星（68％）的脉动。特别是，我们证实了先前关于恒星中低频脉动的报道，其温度属于SPB恒星的不稳定性条（缓慢脉动B星）和$δ$ SCUTI恒星。通过考虑出色的密度，我们得出结论，这些密度不能是P模式，并确认这些可能是快速旋转的SPB恒星的建议。我们还确认它们遵循两个时期的亮度关系，这些关系与偶极子（$ l = m = 1 $）和四倍体（$ l = m = 2 $）一致。其中一颗恒星（$ξ^2 $ CEN）是一种混合脉动器，显示了G和P模式中的常规间距。我们确认$α$ CRU具有低振幅P模式脉动，使其成为天空中最亮的$β$ Cephei恒星之一。我们还发现了几种有趣的二进制文件，包括非常短的心跳星（HD 132094），以前未知的黯然失色的二进制（$π$ lup），以及带有高振幅潮汐驱动脉冲（HR 5846）的高振幅的二进制二进制。结果清楚地表明了苔丝在研究恒星关联中变异性的力量。
We study 119 B stars located in the Scorpius-Centaurus Association using data from NASA's TESS Mission. We see pulsations in 81 stars (68%) across the full range of effective temperatures. In particular, we confirm previous reports of low-frequency pulsations in stars whose temperatures fall between the instability strips of SPB stars (slowly pulsating B stars) and $δ$ Scuti stars. By taking the stellar densities into account, we conclude that these cannot be p modes and confirm previous suggestions that these are probably rapidly-rotating SPB stars. We also confirm that they follow two period-luminosity relations that are consistent with prograde sectoral g modes that are dipole ($l=m=1$) and quadrupole ($l=m=2$), respectively. One of the stars ($ξ^2$ Cen) is a hybrid pulsator that shows regular spacings in both g and p modes. We confirm that $α$ Cru has low-amplitude p-mode pulsations, making it one of the brightest $β$ Cephei stars in the sky. We also find several interesting binaries, including a very short-period heartbeat star (HD 132094), a previously unknown eclipsing binary ($π$ Lup), and an eclipsing binary with high-amplitude tidally driven pulsations (HR 5846). The results clearly demonstrate the power of TESS for studying variability in stellar associations.
