Discovery of CO Gas in the Inner Disk of TW Hydrae | Zendy

T. W. Rettig | Zendy; J. R. Haywood | Zendy; Theodore Simon | Zendy; S. Brittain | Zendy; E. L. Gibb | Zendy

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Discovery of CO Gas in the Inner Disk of TW Hydrae

Author(s) -

T. W. Rettig,

J. R. Haywood,

Theodore Simon,

S. Brittain,

E. L. Gibb

Publication year - 2004

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/426433

Subject(s) - physics , astrophysics , t tauri star , planet , protoplanetary disk , clearance , excited state , planetary system , astronomy , excitation , stars , atomic physics , medicine , urology , quantum mechanics

We report the detection of rovibrationally excited CO emission from the inner disk of the classical T Tauri star (cTTS) TW Hya. We observe ∼ g of CO gas with a rotational temperature of K. The 21 6 # 10 430 40 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. Subject headings: molecular data — planetary systems: protoplanetary disks — stars: individual (TW Hydrae)

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