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4 results on '"Kochan, H."'

1. Growth and Form of Planetary Seedlings : Results from a Microgravity Aggregation Experiment

Author

Blum, J., Wurm, G., Kempf, S., Poppe, T., Klahr, H., 1000090263368, Kozasa, T., Rott, M., Henning, T., Dorschner, J., Schräpler, R., Keller, H. U., Markiewicz, W. J., Mann, I., Gustafson, B. A. S., Giovane, F., Neuhaus, D., Fechtig, H., Grün, E., Feuerbacher, B., Kochan, H., Ratke, L., Goresy, A. El, Morfill, G., Weidenschilling, S. J., Schwehm, G., Metzler, K., Ip, W.-H., Blum, J., Wurm, G., Kempf, S., Poppe, T., Klahr, H., 1000090263368, Kozasa, T., Rott, M., Henning, T., Dorschner, J., Schräpler, R., Keller, H. U., Markiewicz, W. J., Mann, I., Gustafson, B. A. S., Giovane, F., Neuhaus, D., Fechtig, H., Grün, E., Feuerbacher, B., Kochan, H., Ratke, L., Goresy, A. El, Morfill, G., Weidenschilling, S. J., Schwehm, G., Metzler, K., and Ip, W.-H.

Abstract

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.

Published
2000

2. Growth and Form of Planetary Seedlings : Results from a Microgravity Aggregation Experiment

Author

Blum, J., Wurm, G., Kempf, S., Poppe, T., Klahr, H., Kozasa, T., Rott, M., Henning, T., Dorschner, J., Schräpler, R., Keller, H. U., Markiewicz, W. J., Mann, I., Gustafson, B. A. S., Giovane, F., Neuhaus, D., Fechtig, H., Grün, E., Feuerbacher, B., Kochan, H., Ratke, L., Goresy, A. El, Morfill, G., Weidenschilling, S. J., Schwehm, G., Metzler, K., Ip, W.-H., Blum, J., Wurm, G., Kempf, S., Poppe, T., Klahr, H., Kozasa, T., Rott, M., Henning, T., Dorschner, J., Schräpler, R., Keller, H. U., Markiewicz, W. J., Mann, I., Gustafson, B. A. S., Giovane, F., Neuhaus, D., Fechtig, H., Grün, E., Feuerbacher, B., Kochan, H., Ratke, L., Goresy, A. El, Morfill, G., Weidenschilling, S. J., Schwehm, G., Metzler, K., and Ip, W.-H.

Abstract

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.

Published
2000

3. Near-Earth asteroid sample return missions

Author

Sears, D.W.G., Allen, C., Britt, D., Brownlee, D.E., Cheng, A.F., Chapman, C.R., Clark, B.C., Drake, B.G., Franchi, I.G., Gorevan, S., Kochan, H., Lewis, J.S., Lindstrom, M.M., Nishiizumi, K., Pieters, C.M., Race, M.S., Scheeres, D.J., Scott, E.R.D., Yano, H., Sears, D.W.G., Allen, C., Britt, D., Brownlee, D.E., Cheng, A.F., Chapman, C.R., Clark, B.C., Drake, B.G., Franchi, I.G., Gorevan, S., Kochan, H., Lewis, J.S., Lindstrom, M.M., Nishiizumi, K., Pieters, C.M., Race, M.S., Scheeres, D.J., Scott, E.R.D., and Yano, H.

Abstract

The rate of discovery of new NEAs and the success of D-S 1 and NEAR-Shoemaker, suggest that sample return from NEAs is now technically feasible. Here we present a summary of a recent workshop on the topic.

4. Near-Earth asteroid sample return missions

Author

Sears, D.W.G., Allen, C., Britt, D., Brownlee, D.E., Cheng, A.F., Chapman, C.R., Clark, B.C., Drake, B.G., Franchi, I.G., Gorevan, S., Kochan, H., Lewis, J.S., Lindstrom, M.M., Nishiizumi, K., Pieters, C.M., Race, M.S., Scheeres, D.J., Scott, E.R.D., Yano, H., Sears, D.W.G., Allen, C., Britt, D., Brownlee, D.E., Cheng, A.F., Chapman, C.R., Clark, B.C., Drake, B.G., Franchi, I.G., Gorevan, S., Kochan, H., Lewis, J.S., Lindstrom, M.M., Nishiizumi, K., Pieters, C.M., Race, M.S., Scheeres, D.J., Scott, E.R.D., and Yano, H.

Abstract

The rate of discovery of new NEAs and the success of D-S 1 and NEAR-Shoemaker, suggest that sample return from NEAs is now technically feasible. Here we present a summary of a recent workshop on the topic.

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