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Are some meteoroids rubble piles?

Published online by Cambridge University Press:  01 March 2016

Jiří Borovička
Jiří Borovička*
Affiliation:
Astronomical Institute of the Czech Academy of Sciences, Fričova 298, CZ-25165 Ondřejov, Czech Republic email: [email protected]
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Abstract

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The possibility that some meteoroids in the size range 1 – 20 meters are rubble piles i.e. assembles of boulders of various sizes held together only by small van der Waals forces, is investigated. Such meteoroids are expected to start disrupting into individual pieces during the atmospheric entry at very low dynamic pressures of ~ 25 Pa, even before the onset of ablation. The heterogeneous bodies as Almahata Sitta (asteroid 2008 TC3) and Benešov are primary candidates for rubble piles. Nevertheless, by analyzing the deceleration, wake, and light curve of the Benešov bolide, we found that the meteoroid disruption started only at a height of 70 km under dynamic pressure of 50 kPa. No evidence for a very early fragmentation was found also for the Chelyabinsk event.

Keywords

MeteorsMeteoroidsAsteroids
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S318: Asteroids: New Observations, New Models , August 2015 , pp. 80 - 85
Copyright
Copyright © International Astronomical Union 2016 

References

Bischoff, A., Horstmann, M., Pack, A., Laubenstein, M., & Haberer, S. 2010. Meteorit. Plan. Sci., 47, 1638CrossRefGoogle Scholar
Borovička, J. & Charvát, Z. 2009. A&A, 507, 1015Google Scholar
Borovička, J., & Spurný, P. 1996. Icarus, 121, 484CrossRefGoogle Scholar
Borovička, J., Popova, O. P., Nemchinov, I. V., Spurný, P., & Ceplecha, Z. 1998. A&A, 334, 713Google Scholar
Borovička, J., Tóth, J., Igaz, A.et al. 2013a. Meteorit. Plan. Sci., 48, 1757CrossRefGoogle Scholar
Borovička, J., Spurný, P., Brown, P.et al. 2013b. Nature, 503, 235CrossRefGoogle Scholar
Borovička, J., Spurný, P. & Brown, P. 2015. In: Michel, P.et al. (eds.), Asteroids IV (Tucson: Univ. of Arizona), 257Google Scholar
Brown, P. G., Assink, J. D., Astiz, L.et al. 2013. Nature, 503, 238CrossRefGoogle Scholar
Ceplecha, Z., & ReVelle, D. O. 2005. Meteorit. Plan. Sci., 40, 35CrossRefGoogle Scholar
Ceplecha, Z., Spurný, P., Borovička, J., & Keclíková, J. 1993. A&A, 507, 1015Google Scholar
Halliday, I. 1968. In Kresák, L. & Millman, P. M. (eds.) Physics and Dynamics of Meteors (Dordrecht: D. Reidel), IAU Symp., 33, 91Google Scholar
Jenniskens, P., Shaddad, M. H., & Numan, D.et al. 2009, Nature, 458, 485CrossRefGoogle Scholar
Popova, O., Borovička, J., Hartmann, W. K et al. 2011. Meteorit. Plan. Sci., 46, 1525Google Scholar
Popova, O. P., Jenniskens, P., Emel'yanenko, V.et al. 2013. Science, 342, 1069CrossRefGoogle Scholar
Pravec, P. & Harris, A. W. 2000, Icarus, 148, 12CrossRefGoogle Scholar
Sánchez, P. & Scheeres, D. J. 2014, Meteorit. Plan. Sci., 49, 788CrossRefGoogle Scholar
Scheirich, P., Ďurech, J., Pravec, P.et al. 2010. Meteorit. Plan. Sci., 45, 1804CrossRefGoogle Scholar
Shaddad, M. H., Jenniskens, P., Numan, D., et al. 2010. Meteorit. Plan. Sci., 45, 1557CrossRefGoogle Scholar
Spurný, P. 1994. Plan. Space Sci., 42, 157CrossRefGoogle Scholar
Spurný, P., Haloda, J., Borovička, J., Shrbený, L., & Halodová, P. 2014. A&A, 570, A39Google Scholar