O ct 2 00 8 A sub-AU outwardly truncated accretion disk around a classical T Tauri star

We present the Spitzer Infrared Spectrograph (IRS) spectrum of SR20, a 5–10 AU binary T Tauri system in the ρ Ophiuchi star forming region. The spectrum has features consistent with the presence of a disk; however, the continuum slope is steeper than the λ slope of an infinite geometrically thin, optically thick disk, indicating that the disk is outwardly… CONTINUE READING