Discovery of CO Gas in the Inner Disk of TW Hydrae

Details Discovery of CO Gas in the Inner Disk of TW Hydrae Discovery of CO Gas in the Inner Disk of TW Hydrae

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...616l.163r&link_type=abstract

The Astrophysical Journal, Volume 616, Issue 2, pp. L163-L166.

Astronomy and Astrophysics

Astronomy

32

Molecular Data, Stars: Planetary Systems: Protoplanetary Disks, Stars: Individual: Constellation Name: Tw Hydrae

Scientific paper

We report the detection of rovibrationally excited CO emission from the inner disk of the classical T Tauri star (cTTS) TW Hya. We observe ~6×1021 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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