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Diffraction limited infrared images of the binary star T Tauri

Ghez, A. M. and Neugebauer, G. and Gorham, P. W. and Haniff, C. A. and Kulkarni, S. R. and Matthews, K. and Koresko, C. and Beckwith, S. (1991) Diffraction limited infrared images of the binary star T Tauri. Astronomical Journal, 102 (12). pp. 2066-2072. ISSN 0004-6256. doi:10.1086/116030.

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High-resolution images of T Tau and its infrared companion have been reconstructed from near- and mid-infrared data collected at the Hale 5 m telescope. The near-infrared ( 1-5 µm) results were obtained by two dimensional speckle imaging and the mid-infrared (10-20 µm) results were derived from shift and add procedures applied to slit scans. The spectral energy distributions of the separated components were constructed from 1 to 20 µm data collected in less than half a year (1990 September to 1991 January). The spectral energy distribution of the optical component (T Tau N) is interpreted as containing two distinct constituents, a photosphere and a surrounding disk of circumstellar material. Measurements at a number of infrared wavelengths over the period 1985 December to 1991 January show a 2 mag color-independent change in the brightness of the infrared component (T Tau S). We propose that this may have been caused by an increase in accretion onto T Tau S and model the spectral energy distribution of T Tau S as being dominated by an accretion disk.

Item Type:Article
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Ghez, A. M.0000-0003-3230-5055
Kulkarni, S. R.0000-0001-5390-8563
Additional Information:© 1991 American Astronomical Society. Received 17 July 1991 We thank the staff of Palomar, especially night assistants Juan Carrasco and Will McKinley for their support during the observations, and J. Graham, A. Sargent, and T. Soifer for many helpful discussions. The Cornell observations at the Palomar Observatory were made as part of a continuing collaborative agreement between the California Institute of Technology and Cornell University. We thank Dr. William Herbst for kindly providing visual photometry. Tom Prince and the Caltech Conconcurrent Supercomputing Facility provided time on the Caltech NCUBE supercomputer. Infrared astrophysics at Caltech is supported by a grant from the NSF. Support for research at Cornell came from the NSF and NASA. S.R.K.’s research is supported by a Presidential Young Investigator award from the NSF, and the Packard foundation. C.A.H. is supported by a SERC/NATO research fellowship.
Group:UNSPECIFIED, Division of Geological and Planetary Sciences
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David and Lucile Packard FoundationUNSPECIFIED
Science and Engineering Research Council (SERC)UNSPECIFIED
North Atlantic Treaty Organization (NATO)UNSPECIFIED
Issue or Number:12
Record Number:CaltechAUTHORS:20170301-075023575
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Official Citation:Diffraction limited infrared images of the binary star T Tauri Ghez, A. M., Neugebauer, G., Gorham, P. W., Haniff, C. A., Kulkarni, S. R., Matthews, K., , Astronomical Journal (ISSN 0004-6256), vol. 102, Dec. 1991, p. 2066-2072.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:74628
Deposited By: Ruth Sustaita
Deposited On:01 Mar 2017 17:47
Last Modified:11 Nov 2021 05:28

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