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Published March 20, 2004 | Submitted + Published
Journal Article Open

Detection of Cool Dust around the G2 V Star HD 107146


We report the detection of dust emission at submillimeter wavelengths from HD 107146, a G2 V star with an age estimated to lie between 80 and 200 Myr. The emission is resolved at 450 μm with a size 300 AU × 210 AU. A fit to the spectral energy distribution gives a dust temperature of 51 K and a dust mass of 0.10 M_⊕. No excess emission above the photosphere was detected at 18 μm, showing that there is very little warm dust and implying the presence of a large inner hole, at least 31 AU (~1") in radius, around the star. The properties of this star-disk system are compared with similar observations of other systems. We also discuss prospects for future observations that may be able to determine whether the inner hole is maintained by the dynamical effect of an unseen orbiting companion.

Additional Information

© 2004. The American Astronomical Society. Received 2003 May 13. Accepted 2003 December 1. We thank Anneila Sargent for counseling during an extended review process, Hervé Aussel, Remo Tilanus, Iain Coulson, and Randy Campbell for advice on instrumentation, Eric Mamajek for helpful discussions on the age of HD 107146, and Alan Tokunaga for making the Keck time available. We acknowledge support from NSF grant AST 03-24328 (J. P. W.), the Beatrice Watson Parrent Fellowship at the University of Hawaii and NASA grant HST-HF-01152.01 (M. C. L.), and NASA contract 1224768, administered through JPL (M. R. M., J. M. C., L. A. H.). This research has made use of the SIMBAD database.

Attached Files

Published - Williams_2004_ApJ_604_414.pdf

Submitted - 0311583.pdf


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