Title

A survey and analysis of Spitzer infrared spectrograph spectra of T Tauri stars in Taurus

Document Type

Article

Publication Date

8-1-2006

Abstract

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 μm 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. © 2006. The American Astronomical Society. All rights reserved.

Publication Name

Astrophysical Journal, Supplement Series

Volume Number

165

First Page

568

Last Page

605

Issue Number

2

DOI

10.1086/505468

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