Growth and form of planetary seedlings:: Results from a microgravity aggregation experiment

被引：202

作者：

Blum, J

Wurm, G

Kempf, S

Poppe, T

Klahr, H

Kozasa, T

Rott, M

Henning, T

Dorschner, J

Schräpler, R

Keller, HU

Markiewicz, WJ

Mann, I

Gustafson, BAS

Giovane, F

Neuhaus, D

Fechtig, H

Grün, E

Feuerbacher, B

Kochan, H

Ratke, L

El Goresy, A

Morfill, G

Weidenschilling, SJ

Schwehm, G

Metzler, K

Ip, WH

机构：

[1] Univ Jena, Inst Astrophys, D-07745 Jena, Germany

[2] Univ Jena, Univ Observ, D-07745 Jena, Germany

[3] Univ Colorado, Atmospher & Space Phys Lab, Boulder, CO 80309 USA

[4] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

[5] Univ Calif Santa Cruz, UCO, Lick Observ, Santa Cruz, CA 95064 USA

[6] Hokkaido Univ, Grad Sch Sci, Div Earth & Planetary Sci, Sapporo, Hokkaido 0600810, Japan

[7] Tech Univ Munich, Fachgebiet Raumfahrttech, D-85748 Garching, Germany

[8] Max Planck Inst Aeron, D-37191 Katlenburg Duhm, Germany

[9] Univ Florida, Dept Astron, Bryant Space Sci Ctr 211, Gainesville, FL 32611 USA

[10] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA

[11] Deutsch Zentrum Luft & Raumfahrt, DLR, Inst Raumsimulat, D-51140 Cologne, Germany

[12] Max Planck Inst Chem, D-55128 Mainz, Germany

[13] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany

[14] Inst Plant Sci, Tucson, AZ 85705 USA

[15] European Space Agcy, Estec, NL-2200 AG Noordwijk, Netherlands

[16] Museum Naturkunde, Inst Mineral, D-10099 Berlin, Germany

[17] Natl Cent Univ, Inst Space Sci, Chungli 32054, Taiwan

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.85.2426

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The outcome of the first stage of planetary formation, which is characterized by ballistic agglomeration of preplanetary dust grains due to Brownian motion in the free molecular flow regime of the solar nebula, is still somewhat speculative. We performed a microgravity experiment flown onboard the space shuttle in which we simulated, for the first time, the onset of free preplanetary dust accumulation and revealed the structures and growth rates of the first dust agglomerates in the young solar system. We find that a thermally aggregating swarm of dust particles evolves very rapidly and forms unexpected open-structured agglomerates.

引用

页码：2426 / 2429

页数：4

共 20 条

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