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28 March 2024
 
  » arxiv » astro-ph/0608038

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A Survey and Analysis of Spitzer Infrared Spectrograph Spectra of T Tauri Stars in Taurus
E. Furlan ; L. Hartmann ; N. Calvet ; P. D’Alessio ; R. Franco-Hernandez ; W. J. Forrest ; D. M. Watson ; K. I. Uchida ; B. Sargent ; J. D. Green ; L. D. Keller ; T. L. Herter ;
Date 1 Aug 2006
Journal Astrophys.J.Suppl. 165 (2006) 568-605
AbstractWe 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.
Source arXiv, astro-ph/0608038
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