论文标题
苔丝揭示了黄蜂33b的相曲线。行星气氛的表征和恒星的脉动
TESS unveils the phase curve of WASP-33b. Characterization of the planetary atmosphere and the pulsations from the star
论文作者
论文摘要
我们介绍了在光波长处的超热木星WASP-33B的全轨相曲线和次要的检测和表征，以及宿主恒星的脉动光谱。我们分析了通过第18区的过境系外行星调查卫星（TESS）收集的数据。WASP-33B属于非常简短的高度受辐照的系外行星的清单，这些甲板是从地面上发现的，后来又被TESS拜访。 WASP-33B的宿主星是Delta scuti型的，在毫米级状态中显示非自由脉动，其周期与主要运输周期相当。这些完全变形了光度光曲线，这阻碍了我们的解释。 By carrying out a detailed determination of the pulsation spectrum of the host star, we find 29 pulsation frequencies with a signal-to-noise ratio higher than 4. After cleaning the light curve from the stellar pulsations, we confidently report a secondary eclipse depth of 305.8 +/- 35.5 parts-per-million (ppm), along with an amplitude of the phase curve of 100.4 +/- 13.1 ppm和相应的向西偏移在最大亮度和28.7 +/- 7.1度的近距离点之间，使WASP-33B成为迄今为止发现偏移的少数行星之一。我们衍生的键反照率，A_B = 0.369 +/- 0.050，以及热回路效率，Epsilon = 0.189 +/- 0.014，再次确认，尽管从宿主星获得了高辐射，但他的WASP-33B的行为与其他热木马的行为相似。通过将相曲线的幅度连接到次要日食的主要传输和深度，我们确定WASP-33B的白天和夜间亮度温度分别为3014 +/- 60 K和1605 +/- 45 K。从由于重力相互作用引起的光度变化的检测，我们估计一个行星质量为m_p = 2.81 +/- 0.53 m $ $ _j。
We present the detection and characterization of the full-orbit phase curve and secondary eclipse of the ultra-hot Jupiter WASP-33b at optical wavelengths, along with the pulsation spectrum of the host star. We analyzed data collected by the Transiting Exoplanet Survey Satellite (TESS) in sector 18. WASP-33b belongs to a very short list of highly irradiated exoplanets that were discovered from the ground and were later visited by TESS. The host star of WASP-33b is of delta Scuti-type and shows nonradial pulsations in the millimagnitude regime, with periods comparable to the period of the primary transit. These completely deform the photometric light curve, which hinders our interpretations. By carrying out a detailed determination of the pulsation spectrum of the host star, we find 29 pulsation frequencies with a signal-to-noise ratio higher than 4. After cleaning the light curve from the stellar pulsations, we confidently report a secondary eclipse depth of 305.8 +/- 35.5 parts-per-million (ppm), along with an amplitude of the phase curve of 100.4 +/- 13.1 ppm and a corresponding westward offset between the region of maximum brightness and the substellar point of 28.7 +/- 7.1 degrees, making WASP-33b one of the few planets with such an offset found so far. Our derived Bond albedo, A_B = 0.369 +/- 0.050, and heat recirculation efficiency, epsilon = 0.189 +/- 0.014, confirm again that he behavior of WASP-33b is similar to that of other hot Jupiters, despite the high irradiation received from its host star. By connecting the amplitude of the phase curve to the primary transit and depths of the secondary eclipse, we determine that the day- and nightside brightness temperatures of WASP-33b are 3014 +/- 60 K and 1605 +/- 45 K, respectively. From the detection of photometric variations due to gravitational interactions, we estimate a planet mass of M_P = 2.81 +/- 0.53 M$_J.
