Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-08-01
Astrophys.J.Suppl.165:568-605,2006
Astronomy and Astrophysics
Astrophysics
51 pages, 15 figures
Scientific paper
10.1086/505468
We present mid-infrared spectra of T Tauri stars in the Taurus star-forming region obtained with the Spitzer Infrared Spectrograph (IRS). For the first time, the 5-36 micron spectra of a large sample of T Tauri stars belonging to the same star-forming region is studied, revealing details of the mid-infrared excess due to dust in circumstellar disks. We analyze common features and differences in the mid-IR spectra based on disk structure, dust grain properties, and the presence of companions. Our analysis encompasses spectral energy distributions from the optical to the far-infrared, a morphological sequence based on the IRS spectra, and spectral indices in IRS wave bands representative of continuum emission. By comparing the observed spectra to a grid of accretion disk models, we infer some basic disk properties for our sample of T Tauri stars, and find additional evidence for dust settling.
Calvet Nuria
D'Alessio Paola
Forrest William John
Franco-Hernández Ramiro
Furlan Elise
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