AI 中文总结
该研究利用APOGEE与TESS数据识别出50颗心跳星，拟合其光变曲线获取轨道参数，测量质量函数，证实非巨星心跳星脱离主序及心跳星比例随有效温度升高快速上升的结论。
AI 中文摘要
具有近心点处显著潮汐形变的短周期高偏心率恒星双星系统，即心跳星，是研究恒星动力学潮汐与振荡的实验室。我们利用SDSS APOGEE识别的双星的TESS光变曲线，从中识别出50颗心跳星。我们用解析模型拟合其相位折叠的TESS光变曲线，以测量轨道周期、偏心率、倾角和近心点幅。对拥有足够APOGEE视向速度观测以获得伴星质量约束的目标，我们测量其质量函数。我们证实了此前的结果：非巨星心跳星已开始脱离主序，且（近）主序双星中心跳星的比例随有效温度升高而快速上升。
英文摘要
Stellar binaries in short-period, highly eccentric systems with significant tidal deformations near pericenter, also known as heartbeat stars, are a laboratory for studying dynamical tides and oscillations in stars. We identify 50 heartbeat stars using TESS light curves of stars identified as binaries using SDSS APOGEE. We fit their phase-folded TESS light curves with an analytic model to measure their orbital periods, eccentricities, inclinations, and arguments of periastron. We measure the mass function of targets with enough APOGEE radial velocity observations to obtain a constraint on the secondary mass. We confirm our previous results that the non-giant heartbeat stars have started to evolve off the main sequence and that the fraction of (near) main sequence binaries that are heartbeat stars rises rapidly with effective temperature.
Comments10 pages, 9 figures
