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Title:
The Formation and Evolution of Planetary Systems: First Results from a Spitzer Legacy Science Program
Authors:
Meyer, M. R.; Hillenbrand, L. A.; Backman, D. E.; Beckwith, S. V. W.; Bouwman, J.; Brooke, T. Y.; Carpenter, J. M.; Cohen, M.; Gorti, U.; Henning, T.; Hines, D. C.; Hollenbach, D.; Kim, J. S.; Lunine, J.; Malhotra, R.; Mamajek, E. E.; Metchev, S.; Moro-Martin, A.; Morris, P.; Najita, J.; Padgett, D. L.; Rodmann, J.; Silverstone, M. D.; Soderblom, D. R.; Stauffer, J. R.; Stobie, E. B.; Strom, S. E.; Watson, D. M.; Weidenschilling, S. J.; Wolf, S.; Young, E.; Engelbracht, C. W.; Gordon, K. D.; Misselt, K.; Morrison, J.; Muzerolle, J.; Su, K.
Affiliation:
AA(Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721.), AB(Astronomy, California Institute of Technology, Pasadena, CA 91125.), AC(NASA Ames Research Center, Moffet Field, CA 94035.), AD(Space Telescope Science Institute, Baltimore, MD 21218.; Johns Hopkins University, Balitmore, MD 21218.), AE(Max-Planck-Institut für Astronomie, D-69117 Heidelberg, Germany.), AF(Astronomy, California Institute of Technology, Pasadena, CA 91125.), AG(Astronomy, California Institute of Technology, Pasadena, CA 91125.), AH(Radio Astronomy, University of California, Berkeley, CA 94720.), AI(NASA Ames Research Center, Moffet Field, CA 94035.), AJ(Max-Planck-Institut für Astronomie, D-69117 Heidelberg, Germany.), AK(Space Science Institute, Boulder, CO 80301.), AL(NASA Ames Research Center, Moffet Field, CA 94035.), AM(Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721.), AN(Lunar Planetary Laboratory, University of Arizona, Tucson, AZ 85721.), AO(Lunar Planetary Laboratory, University of Arizona, Tucson, AZ 85721.), AP(Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721.), AQ(Astronomy, California Institute of Technology, Pasadena, CA 91125.), AR(Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721.), AS(Spitzer Science Center, California Institute of Technology, Pasadena, CA 91125.), AT(National Optical Astronomy Observatory, Tucson, AZ 85719.), AU(Spitzer Science Center, California Institute of Technology, Pasadena, CA 91125.), AV(Max-Planck-Institut für Astronomie, D-69117 Heidelberg, Germany.), AW(Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721.), AX(Space Telescope Science Institute, Baltimore, MD 21218.), AY(Spitzer Science Center, California Institute of Technology, Pasadena, CA 91125.), AZ(Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721.), BA(National Optical Astronomy Observatory, Tucson, AZ 85719.), BB(Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627.), BC(Planetary Science Institute, Tucson, AZ 85719.), BD(Max-Planck-Institut für Astronomie, D-69117 Heidelberg, Germany.), BE(Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721.), BF(Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721.), BG(Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721.), BH(Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721.), BI(Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721.), BJ(Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721.), BK(Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721.)
Publication:
The Astrophysical Journal Supplement Series, Volume 154, Issue 1, pp. 422-427. (ApJS Homepage)
Publication Date:
09/2004
Origin:
UCP
ApJ Keywords:
Stars: Circumstellar Matter, Infrared: Stars, Stars: Planetary Systems: Protoplanetary Disks
DOI:
10.1086/423177
Bibliographic Code:
2004ApJS..154..422M

Abstract

We present 3-160 μm photometry obtained with the Infrared Array Camera (IRAC) and Multiband Imaging Photometer for Spitzer (MIPS) instruments for the first five targets from the Spitzer Space Telescope Legacy Science Program ``Formation and Evolution of Planetary Systems'' and 4-35 μm spectrophotometry obtained with the Infrared Spectrograph (IRS) for two sources. We discuss in detail our observations of the debris disks surrounding HD 105 (G0 V, 30+/-10 Myr) and HD 150706 (G3 V, ~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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