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Published November 1, 1999 | Submitted + Published
Journal Article Open

Imaging the Haro 6-10 Infrared Companion


We present an infrared imaging study of the low-mass pre-main-sequence binary system Haro 6-10. This system is one of a handful in which the optically visible primary has the characteristics of a normal T Tauri star, while the secondary is a so-called "infrared companion" (IRC), a strongly extincted object that emits most of its luminosity in the infrared. A speckle holographic technique was used to produce nearly diffraction-limited images on three nights over a 1 yr period starting in late 1997. The images show that the IRC is obscured and surrounded by a compact, irregular, and variable nebula. This structure is in striking contrast to the well-ordered edge-on disk associated with HK Tauri B, the extincted companion to another T Tauri star of similar age. A new, resolved intensity peak was found 0".4 southwest of the IRC. We suggest that it may represent light scattered by a clump of dusty material illuminated by starlight escaping along an outflow-carved cavity in the IRC envelope. The primary star became fainter and the companion became more extended during the observing period.

Additional Information

© 1999 American Astronomical Society. Received 1999 August 3; accepted 1999 September 3; published 1999 October 4. It is a pleasure to thank A. Bouchez for his assistance with the observations, F. Roddier for a useful suggestion regarding the data reduction, and the anonymous referee for suggestions that improved the interpretation of the results. Data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. This research was supported by the National Aeronautics and Space Administration.

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Published - 1538-4357_525_1_L49.pdf

Submitted - 9909086.pdf


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