Title of article :
Experiments on the photophoretic motion of chondrules and dust aggregates—Indications for the transport of matter in protoplanetary disks
Author/Authors :
Wurm، نويسنده , , Gerhard and Teiser، نويسنده , , Jens and Bischoff، نويسنده , , Addi and Haack، نويسنده , , Henning and Roszjar، نويسنده , , Julia، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2010
Pages :
10
From page :
482
To page :
491
Abstract :
In a set of 16 drop tower experiments the motion of sub-millimeter to millimeter-sized particles under microgravity was observed. Illumination by a halogen lamp induced acceleration of the particles due to photophoresis. Photophoresis on dust-free chondrules, on chondrules, glass spheres and metal spheres covered with SiC dust and on pure SiC dust aggregates was studied. This is the first time that photophoretic motion of millimeter-sized particles has been studied experimentally. The absolute values for the photophoretic force are consistent with theoretical expectations for spherical particles. The strength of the photophoretic force varies for chondrules, dust covered particles and pure dust from low to strong, respectively. The measurements support the idea that photophoresis in the early Solar System can be efficient to transport solid particles outward.
Keywords :
experimental techniques , solar system , origin , meteorites , disks , Solar nebula
Journal title :
Icarus
Serial Year :
2010
Journal title :
Icarus
Record number :
2377638
Link To Document :
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