论文标题
苔丝II：$ Spitzer $的第一个可居住地球大小的星球证实了700 d
The First Habitable Zone Earth-Sized Planet From TESS II: $Spitzer$ Confirms TOI-700 d
论文作者
论文摘要
我们提出$ Spitzer $ 4.5 $ $ m m $ m对TOI-700 D的过境观察，这是一个可居住的区域地球大小的行星，在多层系统中，经过了附近的M-warf Star（TIC 150428135，2MASS J06282325-653456）。 TOI-700 D的半径为$ 1.144^{+0.062} _ { - 0.061} r_ \ oplus $和OPLUS $和OPLUS $和OPLUS $和OPLUS $和ORBITS和ORBITS在其主机之星的保守居住区内，周期为37.42天（$ T_ \ Mathrm {eq} \ sim 269 $ k）。 TOI-700还容纳了两个小的内部行星（r $ _b $ = $ 1.037^{+0.065} _ { - 0.064} r_ \ oplus $＆r $＆r $ _c $ = $ 2.65^{+0.16} _ { - 0.15} _ { - 0.15} r _ \ oplus $），且oplus $ 16和9.98。我们的$ Spitzer $观测结果证实了TOSS的检测，并消除了对它是真正的星球的任何剩余疑问。我们分析了$ Spitzer $光曲线，结合了苔丝观测的11个扇区和从LCOGT网络的TOI-700 C过境，以确定完整的系统参数。尽管研究TOI-700 D的大气在即将到来的设施中不可能可行，但可以使用最先进的径向速度仪器（预期的RV半增强型$ \ sim $ 70 cm/s）来测量TOI-700 D的质量。
We present $Spitzer$ 4.5$μ$m observations of the transit of TOI-700 d, a habitable zone Earth-sized planet in a multiplanet system transiting a nearby M-dwarf star (TIC 150428135, 2MASS J06282325-6534456). TOI-700 d has a radius of $1.144^{+0.062}_{-0.061}R_\oplus$ and orbits within its host star's conservative habitable zone with a period of 37.42 days ($T_\mathrm{eq} \sim 269$K). TOI-700 also hosts two small inner planets (R$_b$=$1.037^{+0.065}_{-0.064}R_\oplus$ & R$_c$=$2.65^{+0.16}_{-0.15}R_\oplus$) with periods of 9.98 and 16.05 days, respectively. Our $Spitzer$ observations confirm the TESS detection of TOI-700 d and remove any remaining doubt that it is a genuine planet. We analyze the $Spitzer$ light curve combined with the 11 sectors of TESS observations and a transit of TOI-700 c from the LCOGT network to determine the full system parameters. Although studying the atmosphere of TOI-700 d is not likely feasible with upcoming facilities, it may be possible to measure the mass of TOI-700 d using state-of-the-art radial velocity instruments (expected RV semi-amplitude of $\sim$70 cm/s).
