The state of protoplanetary material 10 Myr after stellar formation: circumstellar disks in the TW Hydrae association

K. I. Uchida, N. Calvet, L. Hartmann +17

We have used the Spitzer Infrared Spectrograph to observe seven members of the TW Hya association, the nearest stellar association whose age ($\sim$ 10 Myr) is similar to the times…