We report the detection of rovibrationally excited CO emission from the inner disk of the classical T Tauri star (cTTS) TW Hya. We observe ～6 x 10~(21) g of CO gas with a rotational temperature of 430 +- 40 K. The linearity of the excitation plot suggests that the CO is optically thin. Atypical for cTTSs, hot CO was not detected, implying that TW Hya has cleared its inner disk region out to a radial distance of ～0.5 AU. We discuss implications for the structure of the disk as it relates to replenishment and planet formation.
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机译：我们报告了从经典T Tauri恒星（cTTS）TW Hya的内盘检测到的激发激发的CO排放。我们观察到〜6 x 10〜（21）g的CO气体，旋转温度为430 +-40K。激发曲线的线性表明，CO光学上很薄。对于典型的cTTS，未检测到热CO，这表明TW Hya已清除了其内盘区域，径向距离为〜0.5 AU。我们讨论了磁盘结构的含义，因为它与补给和行星形成有关。
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