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A slowly accreting ~10 Myr old transitional disk in Orion OB1a
C. Espaillat, J. Muzerolle, J. Hernandez +7
Here we present the Spitzer IRS spectrum of CVSO 224, the sole transitional disk located within the ~10 Myr old 25 Orionis group in Orion OB1a. A model fit to the spectral energy d…
A Spitzer view of protoplanetary disks in the gamma Velorum cluster
Jesus Hernandez, Lee Hartmann, Nuria Calvet +4
We present new Spitzer Space Telescope observations of stars in the young ~5 Myr gamma Velorum stellar cluster. Combining optical and 2MASS photometry, we have selected 579 stars a…
Spitzer IRS Observations of Disks around Brown Dwarfs in the TW Hydra Association
A. L. Morrow, K. L. Luhman, C. Espaillat +8
Using SpeX at the NASA Infrared Telescope Facility and the Spitzer Infrared Spectrograph, we have obtained infrared spectra from 0.7 to 30um for three young brown dwarfs in the TW…
A sub-AU outwardly truncated accretion disk around a classical T Tauri star
M. K. McClure, W. J. Forrest, B. A. Sargent +10
We present the Spitzer Infrared Spectrograph (IRS) spectrum of SR20, a 5--10 AU binary T Tauri system in the Ophiuchi star forming region. The spectrum has features consistent…
CaII Infrared triplet line models in Classical T Tauri stars
R. Azevedo, N. Calvet, L. Hartmann +3
We study the formation of the calcium II infrared triplet lines 8498Å, 8542Åand 8662Å, in the accreting magnetospheric flows of Classical T Tauri stars (CTTS), and present a grid o…
Spitzer IRS Spectra and Envelope Models of Class I Protostars in Taurus
E. Furlan, M. McClure, N. Calvet +8
We present Spitzer Infrared Spectrograph spectra of 28 Class I protostars in the Taurus star-forming region. The 5 to 36 micron spectra reveal excess emission from the inner region…