arXiv · astro-ph/0406301
The Formation and Evolution of Planetary Systems: First Results from a Spitzer Legacy Science Program
Abstract
We present 3-160 micron photometry obtained with the IRAC and MIPS instruments for the first five targets from the Spitzer Legacy Science Program "Formation and Evolution of Planetary Systems" and 4-35 micron spectro-photometry obtained with the IRS for two sources. We discuss in detail our observations of the debris disks surrounding HD 105 (G0V, 30 +- 10 Myr) and HD 150706 (G3V, ~ 700 +- 300 Myr). For HD 105, possible interpretations include large bodies clearing the dust inside of 45 AU or a reservoir of gas capable of sculpting the dust distribution. The disk surrounding HD 150706 also exhibits evidence of a large inner hole in its dust distribution. Of the four survey targets without previously detected IR excess, spanning ages 30 Myr to 3 Gyr, the new detection of excess in just one system of intermediate age suggests a variety of initial conditions or divergent evolutionary paths for debris disk systems orbiting solar-type stars.
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M. R. Meyer, L. A. Hillenbrand, D. E. Backman, S. V. W. Beckwith, J. Bouwman, T. Y. Brooke, J. M. Carpenter, M. Cohen, U. Gorti, T. Henning, D. C. Hines, D. Hollenbach, J. S. Kim, J. Lunine, R. Malhotra, E. E. Mamajek, S. Metchev, A. Moro--Martin, P. Morris, J. Najita, D. L. Padgett, J. Rodmann, M. D. Silverstone, D. R. Soderblom, J. R. Stauffer, E. B. Stobie, S. E. Strom, D. M. Watson, S. J. Weidenschilling, S. Wolf, E. Young, C. W. Engelbracht, K. D. Gordon, K. Misselt, J. Morrison, J. Muzerolle, K. Su. 2004-06-11. The Formation and Evolution of Planetary Systems: First Results from a Spitzer Legacy Science Program. https://doi.org/10.1086/423177
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