Reflected light from sand grains in the terrestrial zone of a protoplanetary disk

被引：0
|
作者：
William Herbst
Catrina M. Hamilton
Katherine LeDuc
Joshua N. Winn
Christopher M. Johns-Krull
Reinhard Mundt
Mansur Ibrahimov
机构：
[1] Wesleyan University,Astronomy Department
[2] Middletown,Physics and Astronomy Department
[3] Connecticut 06459,Department of Physics
[4] USA,Department of Physics and Astronomy
[5] Dickinson College,undefined
[6] Carlisle,undefined
[7] Pennsylvania 17013,undefined
[8] USA,undefined
[9] Massachusetts Institute of Technology,undefined
[10] 77 Massachusetts Avenue,undefined
[11] Cambridge,undefined
[12] Massachusetts 02139,undefined
[13] USA,undefined
[14] Rice University,undefined
[15] Houston,undefined
[16] Texas 77005,undefined
[17] USA,undefined
[18] Max-Planck-Institut für Astronomie,undefined
[19] Königstuhl 17,undefined
[20] D-69117 Heidelberg,undefined
[21] Germany,undefined
[22] Ulugh Beg Astronomical Institute of the Uzbek Academy of Sciences,undefined
[23] Astronomicheskaya 33,undefined
[24] 700052 Tashkent,undefined
[25] Uzbekistan,undefined
来源：
Nature | 2008年 / 452卷
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摘要：
The formation of Earth-like planets is thought to start with the coagulation of interstellar grains that are only about 1 µm in diameter to form millimetre (sand), centimetre (pebble) and metre-sized (boulder) objects relatively rapidly. The prospect of observing such small objects in a protoplanetary disk seems pretty remote, but the combination of reflectance spectroscopy and the fortuitous geometry of the dust disk in the KH 15D eclipsing binary system has provided an indirect view of the process. The spectra of the light reflected from the disk are consistent with the presence of sand grains that have grown to about a millimetre in size or larger in the terrestrial zone of the host star.
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页码：194 / 197
页数：3
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