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Your search keyword '"Perry, M. E."' showing total 6 results
Start Over Author "Perry, M. E." Journal nature geoscience
6 results on '"Perry, M. E."'

1. Crater population on asteroid (101955) Bennu indicates impact armouring and a young surface

Author

Bierhaus, E. B., Trang, D., Daly, R. T., Bennett, C. A., Barnouin, O. S., Walsh, K. J., Ballouz, R.-L., Bottke, W. F., Burke, K. N., Perry, M. E., Jawin, E. R., McCoy, T. J., Connolly, Jr., H. C., Daly, M. G., Dworkin, J. P., DellaGiustina, D. N., Gay, P. L., Brodbeck, J. I., Nolau, J., Padilla, J., Stewart, S., Schwartz, S., Michel, P., Pajola, M., and Lauretta, D. S.

Published
2022
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3. Craters, Boulders and Regolith of (101955) Bennu Indicative of an Old and Dynamic Surface

Author

Walsh, K. J, Jawin, E. R, Ballouz, R.-L, Barnouin, O. S, Bierhaus, E. B, Jr, H. C. Connolly, Molaro, J. L, McCoy, T. J, Delbo, M, Hartzell, C. M, Pajola, M, Schwartz, S. R, Trang, D, Asphaug, E, Becker, K. J, Beddingfield, C. B, Bennett, C. A, Bottke, W. F, Burke, K. N, Clark, B. C, Daly, M. G, DellaGiustina, D. N, Dworkin, J. P, Elder, C. M, Golish, D. R, Hildebrand, A. R, Malhotra, R, Marshall, J, Michel, P, Nolan, M. C, Perry, M. E, Rizk, B, Ryan, A, Sandford, S. A, Scheeres, D. J, Susorney, H. C. M, Thuillet, F, and Lauretta, D. S

Subjects
Space Sciences (General)
Abstract

Small, kilometre-sized near-Earth asteroids are expected to have young and frequently refreshed surfaces for two reasons: collisional disruptions are frequent in the main asteroid belt where they originate, and thermal or tidal processes act on them once they become near-Earth asteroids. Here we present early measurements of numerous large candidate impact craters on near-Earth asteroid (101955) Bennu by the OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security- Regolith Explorer) mission, which indicate a surface that is between 100 million and 1 billion years old, predating Bennu's expected duration as a near-Earth asteroid. We also observe many fractured boulders, the morphology of which suggests an influence of impact or thermal processes over a considerable amount of time since the boulders were exposed at the surface. However, the surface also shows signs of more recent mass movement: clusters of boulders at topographic lows, a deficiency of small craters and infill of large craters. The oldest features likely record events from Bennu's time in the main asteroid belt.

Published
2019
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4. Publisher Correction: Craters, boulders and regolith of (101955) Bennu indicative of an old and dynamic surface

Author

Walsh, K. J., Jawin, E. R., Ballouz, R.-L., Barnouin, O. S., Bierhaus, E. B., Connolly, Jr, H. C., Molaro, J. L., McCoy, T. J., Delbo’, M., Hartzell, C. M., Pajola, M., Schwartz, S. R., Trang, D., Asphaug, E., Becker, K. J., Beddingfield, C. B., Bennett, C. A., Bottke, W. F., Burke, K. N., Clark, B. C., Daly, M. G., DellaGiustina, D. N., Dworkin, J. P., Elder, C. M., Golish, D. R., Hildebrand, A. R., Malhotra, R., Marshall, J., Michel, P., Nolan, M. C., Perry, M. E., Rizk, B., Ryan, A., Sandford, S. A., Scheeres, D. J., Susorney, H. C. M., Thuillet, F., Lauretta, D. S., and The OSIRIS-REx Team

Published
2019
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5. Shape of (101955) Bennu indicative of a rubble pile with internal stiffness

Author

Barnouin, O. S., Daly, M. G., Palmer, E. E., Gaskell, R. W., Weirich, J. R., Johnson, C. L., Al Asad, M. M., Roberts, J. H., Perry, M. E., Susorney, H. C. M., Daly, R. T., Bierhaus, E. B., Seabrook, J. A., Espiritu, R. C., Nair, A. H., Nguyen, L., Neumann, G. A., Ernst, C. M., Boynton, W. V., Nolan, M. C., Adam, C. D., Moreau, M. C., Rizk, B., Drouet D’Aubigny, C. Y., Jawin, E. R., Walsh, K. J., Michel, P., Schwartz, S. R., Ballouz, R.-L., Mazarico, E. M., Scheeres, D. J., McMahon, J. W., Bottke, W. F., Sugita, S., Hirata, N., Hirata, N., Watanabe, S.-i., Burke, K. N., DellaGiustina, D. N., Bennett, C. A., and Lauretta, D. S.

Abstract

The shapes of asteroids reflect interplay between their interior properties and the processes responsible for their formation and evolution as they journey through the Solar System. Prior to the OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer) mission, Earth-based radar imaging gave an overview of (101955) Bennu’s shape. Here we construct a high-resolution shape model from OSIRIS-REx images. We find that Bennu’s top-like shape, considerable macroporosity and prominent surface boulders suggest that it is a rubble pile. High-standing, north–south ridges that extend from pole to pole, many long grooves and surface mass wasting indicate some low levels of internal friction and/or cohesion. Our shape model indicates that, similar to other top-shaped asteroids, Bennu formed by reaccumulation and underwent past periods of fast spin, which led to its current shape. Today, Bennu might follow a different evolutionary pathway, with an interior stiffness that permits surface cracking and mass wasting.

Published
2019
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6. Author Correction: Shape of (101955) Bennu indicative of a rubble pile with internal stiffness

Author

Barnouin, O. S., Daly, M. G., Palmer, E. E., Gaskell, R. W., Weirich, J. R., Johnson, C. L., Al Asad, M. M., Roberts, J. H., Perry, M. E., Susorney, H. C. M., Daly, R. T., Bierhaus, E. B., Seabrook, J. A., Espiritu, R. C., Nair, A. H., Nguyen, L., Neumann, G. A., Ernst, C. M., Boynton, W. V., Nolan, M. C., Adam, C. D., Moreau, M. C., Rizk, B., Drouet D’Aubigny, C. Y., Jawin, E. R., Walsh, K. J., Michel, P., Schwartz, S. R., Ballouz, R.-L., Mazarico, E. M., Scheeres, D. J., McMahon, J. W., Bottke, W. F., Sugita, S., Hirata, N., Hirata, N., Watanabe, S.-i., Burke, K. N., DellaGiustina, D. N., Bennett, C. A., and Lauretta, D. S.

Abstract

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

Published
2020
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