Spitzer observations of circumstellar disks

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

Thanks to its very high sensitivity, the Spitzer Space Telescope is revisiting many of the questions on circumstellar dust disks evolution raised by previous space-based infrared observatories, in particular IRAS and ISO. I review in this paper recent Spitzer results on disks around young stars, including disk dissipation time-scale estimates, the identification of wTTS with disks, and the finding of transition disks. I will then summarize some of the results on %silicate grains dust mineralogy in T Tauri disks obtained as part of the ``Core to Disks'' (c2d) Legacy Project.

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