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• W2150465135 abstract "We present observations of four T Tauri stars using long baseline infrared interferometry from the Palomar Testbed Interferometer. The target sources, T Tau N, SU Aur, RY Tau and DR Tau, are all known to be surrounded by dusty circumstellar disks. The observations directly trace the inner regions (< 1 AU) of the disk and can be used to constrain the physical properties of this material. For three of the sources observed, the infrared emission is clearly resolved. We first use geometric models to characterize the emission region size, which ranges from 0.04 to 0.3 AU in radius. We then use Monte Carlo radiation transfer models of accretion disks to jointly model the spectral energy distribution and the interferometric observations with disk models including accretion and scattering. With these models, we are able to reproduce the data set with extended emission arising from structures larger than 10 milliarcseconds contributing less than 6% of the K band emission, consistent with there being little or no envelope remaining for these Class II sources (d log(lambda*F_lambda)/d log(lambda) ~ -2 to 0 in the infrared). The radiation transfer models have inner radii for the dust similar to the geometric models; however, for RY Tau emission from gas within the inner dust radius contributes significantly to the model flux and visibility at infrared wavelengths. The main conclusion of our modeling is that emission from inner gas disks (between the magnetic truncation radius and the dust destruction radius) can be a significant component in the inner disk flux for sources with large inner dust radii." @default.
• W2150465135 created "2016-06-24" @default.
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• W2150465135 date "2005-03-20" @default.
• W2150465135 modified "2023-10-05" @default.
• W2150465135 title "Observations and Modeling of the Inner Disk Region of T Tauri Stars" @default.
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• W2150465135 doi "https://doi.org/10.1086/427770" @default.
• W2150465135 hasPublicationYear "2005" @default.
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