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Predominantly left-handed circular polarization in comets: Does it indicate L-enantiomeric excess in cometary organics?

Published online by Cambridge University Press:  01 February 2008

V. Rosenbush ,
N. Kiselev  and
L. Kolokolova
V. Rosenbush
Affiliation:
Main Astronomical Observatory, National Academy of Sciences of Ukraine, 27 Zabolotnoho Str., 03680 Kyiv, Ukraine email: rosevera@mao.kiev.ua
N. Kiselev
Affiliation:
Main Astronomical Observatory, National Academy of Sciences of Ukraine, 27 Zabolotnoho Str., 03680 Kyiv, Ukraine email: rosevera@mao.kiev.ua
L. Kolokolova
Affiliation:
Department of Astronomy, University of Maryland, College Park, MD, 20742, USA email: ludmilla@astro.umd.edu
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Abstract

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Polarimetric observations demonstrated that all comets with significant values of circular polarization show predominantly left–handed circularly polarized light. We discuss the presence of homochiral organics in cometary materials as a source of the observed circular polarization. We have studied the effect of chirality on light–scattering properties of cometary dust considering particles that possess optical activity. Our investigations show that the cometary dust may include optically active materials which can be prebiological homochiral organics.

Keywords

Cometsobservationspolarizationlight scattering
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S251: Organic Matter in Space , February 2008 , pp. 311 - 312
Copyright
Copyright © International Astronomical Union 2008

References

Bailey, J. 2000, in: Lemarchand, G. & Meech, K. (eds.), ASP–CS, 213, p. 349Google Scholar
Bohren, C. & Huffman, D. 1983, Absorption and Scattering of Light by Small Particles, (New York: John Wiley & Sons)Google Scholar
Bonner, W. & Bean, B. 2000, Origins of Life and Evolution of the Biosphere, 30, 513Google Scholar
Cronin, J. R. & Pizzarello, S. 1986, Geochimica et Cosmochimica Acta, 50, 2419CrossRefGoogle Scholar
Cronin, J. R. & Pizzarello, S. 1997, Science, 275, 951CrossRefGoogle Scholar
Dollfus, A. & Suchail, J. L. 1987, A&A, 187, 669Google Scholar
Manset, N. & Bastien, P. 1997, Icarus, 145, 203CrossRefGoogle Scholar
Meierhenrich, U. & Thiemann, W. 2004, Origins of Life and Evolution of the Biosphere, 34, 111Google Scholar
Nuevo, M., Meierhenrich, U. J., D'Hendecourt, L., et al. 2007, Adv. Sp. Res., 39, 400Google Scholar
Pizzarello, S. 2004, Origins of Life and Evolution of the Biosphere, 34, 25Google Scholar
Rosenbush, V., Kiselev, N., Shakhovskoy, N., et al. 2007a, in: Videen, G., Mishchenko, M., Mengüc, M. P. & Zakharova, N. (eds.), Tenth Conference on Electromagnetic & Light Scattering, (New York: Sigma Space Partners), p. 181CrossRefGoogle Scholar
Rosenbush, V., Kolokolova, L., Lazarian, A., et al. 2007b, Icarus, 186, 317Google Scholar
Rosenbush, V. K., Shakhovskoy, N. M. & Rosenbush, A. E. 1997, Earth, Moon, Planets, 78, 381CrossRefGoogle Scholar
Tozzi, G. P., Bagnulo, S., Boehnhardt, H., et al. 2006, 1st European Planetary. Science Congress (EPSC), September 18-22, 2006, Berlin, GermanyGoogle Scholar