论文标题
检测55 cancri e的掩星
Detection of the Occultation of 55 Cancri e with TESS
论文作者
论文摘要
55 cancri e是苔丝（Tess）在21扇区中观察到的超短期横断性超级地球。使用此光度法，我们测量苔丝带通道中的螺螺质深度，利用精确的过境光曲线并比较多个脱键方法。我们测量的掩盖深度为$（15.0 \ pm4.8）$ ppm-亮度的惊人变化，但苔丝仅在一个数据领域就检测到了一个。这意味着亮度温度为$ 2800 _ { - 160}^{+130} $ k，鉴于用Spitzer测得的平均深度，该温度比预期的1.5 $σ$ k左右。这不是正式的差异，可以由已知变异性或反照率约为0.5来解释。无论如何，对该系统的未来苔丝观察将为进一步研究这种衰弱的世界的气氛提供一个令人兴奋的机会。
55 Cancri e is an ultra-short period transiting Super-Earth observed by TESS in Sector 21. Using this photometry, we measure the occultation depth in the TESS bandpass, leveraging the precise transit light curve and comparing multiple detrending methods. We measure the occultation depth to be $(15.0\pm4.8)$ppm - a staggeringly small change in brightness, yet one detected by TESS in just a single sector of data. This implies a brightness temperature of $2800_{-160}^{+130}$K, which is around 1.5$σ$ greater than expected given the mean depth measured with Spitzer. This is not a formally significant difference, and may be accounted for by the known variability, or by an albedo of ~0.5. In any case, future TESS observations of this system will provide an exciting opportunity to further study this diminutive world's atmosphere.
