论文标题
重新讨论黯然失色的二进制文件。纸张X.脉动B型系统V1388 ORIONIS
Rediscussion of eclipsing binaries. Paper X. The pulsating B-type system V1388 Orionis
论文作者
论文摘要
V1388 ORI是一种早期B型脱落的二进制，其物理特性以前是通过专用光谱和地面调查光曲线测量的。我们使用从过渡系外行星调查卫星（TESS）的新可用光曲线（TESS）重新考虑系统的性质。我们在系统中发现了两个频率，分别为2.99 d $^{ - 1} $和4.00 d $^{ - 1} $，这可能是由于beta cephei或缓慢脉动的B-Star脉动。在轨道频率的倍数上存在大量其他重要频率，0.4572 d $^{ - 1} $。我们找不到完全令人满意的日食模型，但是最佳尝试显示了拟合参数的高度一致值。我们发现7.24 +/- 0.08 MSUN和5.03 +/- 0.04 MSUN的质量和5.30 +/- 0.07 rsun和3.14 +/- 0.06 rsun的质量。该系统的性质与理论恒星进化模型的预测和GAIA EDR3视差非常吻合，如果将已发布的温度估计值向下修改1500 K，则对于更大，更大的恒星和17000 K的同伴而言，其同伴为19000 K。
V1388 Ori is an early-B type detached eclipsing binary whose physical properties have previously been measured from dedicated spectroscopy and a ground-based survey light curve. We reconsider the properties of the system using newly-available light curves from the Transiting Exoplanet Survey Satellite (TESS). We discover two frequencies in the system, at 2.99 d$^{-1}$ and 4.00 d$^{-1}$ which are probably due to beta Cephei or slowly-pulsating B-star pulsations. A large number of additional significant frequencies exist at multiples of the orbital frequency, 0.4572 d$^{-1}$. We are not able to find a fully satisfactory model of the eclipses, but the best attempts show highly consistent values for the fitted parameters. We find masses of 7.24 +/- 0.08 Msun and 5.03 +/- 0.04 Msun, and radii of 5.30 +/- 0.07 Rsun and 3.14 +/- 0.06 Rsun. The properties of the system are in good agreement with the predictions of theoretical stellar evolutionary models and the Gaia EDR3 parallax if the published temperature estimates are revised downwards by 1500 K, to 19000 K for the larger and more massive star and 17000 K for its companion.
