Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010pdac.book..191p&link_type=abstract
Protoplanetary Dust: Astrophysical and Cosmochemical Perspectives, eds.: D. Apai, D. S. Lauretta, 2010, Cambridge University Pre
Astronomy and Astrophysics
Astrophysics
2
Planet Formation, Dust, Grain Growth, Mid-Infrared Spectroscopy, Sub-Millimeter, Dust Opacity, Chondritic Meteorite, Chondritic Matrix, Interplanetary Dust Particles, Planetesimal Formation, Asteroids, Laboratory Simulations
Scientific paper
This chapter describes how the growth of particles from sub-micron sizes to cm-sizes in protoplanetary disks is chronicled both by astronomical observations and microscopic imaging of pristine meteoritic material. A growing sample of planet-forming disks at a range of evolutionary stages is available for astronomical remote sensing studies, but limitations of spatial resolution as well as very high optical depths still hides the inner mid-plane of the disks - the exact region where planets are believed to form. Conversely, meteoritic studies currently exclusively sample material from the inner mid-plane of the solar nebula, and the fact that such material can be brought into a laboratory setting allows very detailed studies of its properties. The dust component in the matrices of chondritic meteorites carries a record of continuous processing and modification of fine-grained material during protoplanetary disk evolution that tends to obscure the earliest stages of dust formation, growth and coagulation. We discuss how knowledge on dust particle size evolution gained from these two very different approaches can be combined to significantly enhance our understanding of the first stages in planet formation.
Brearley Adrian J.
Pontoppidan Klaus Martin
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