Forbidden planetesimals

Planetesimals are born fragile and are subject to destruction by wind erosion as they move through the gas of a protoplanetary disk. In microgravity experiments, we determined the shear stress necessary for erosion of a surface consisting of 1 mm dust pebbles down to 1 Pa ambient pressure. This is d...

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Published inAstronomy and astrophysics (Berlin) Vol. 672; p. A169
Main Authors Schönau, L., Teiser, J., Demirci, T., Joeris, K., Bila, T., Onyeagusi, F. C., Fritscher, M., Wurm, G.
Format Journal Article
LanguageEnglish
Published 01.04.2023
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ISSN0004-6361
1432-0746
DOI10.1051/0004-6361/202245499

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Summary:Planetesimals are born fragile and are subject to destruction by wind erosion as they move through the gas of a protoplanetary disk. In microgravity experiments, we determined the shear stress necessary for erosion of a surface consisting of 1 mm dust pebbles down to 1 Pa ambient pressure. This is directly applicable to protoplanetary disks. Even pebble pile planetesimals with low eccentricities of 0.1 cannot survive inside of 1 au in a minimum-mass solar nebula, and safe zones for planetesimals with higher eccentricities are located even farther out.
ISSN:0004-6361
1432-0746
DOI:10.1051/0004-6361/202245499