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Galactic environment and cometary flux from the Oort cloud

Published online by Cambridge University Press:  06 April 2010

Marc Fouchard
Marc Fouchard*
Affiliation:
LAL-IMCCE/Université de Lille 1, 1 Impasse de l'Observatoire, 59 000 Lille, France email: [email protected]
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Abstract

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The Oort cloud, which corresponds to the furthest boundary of our Solar System, is considered as the main reservoir of long period comets. This cloud is likely a residual of the Solar System formation due to the gravitational effects of the young planets on the remaining planetesimals. Given that the cloud extends to large distances from the Sun (several times 10 000 AU), the bodies in this region have their trajectories affected by the Galactic environment of the Solar System. This environment is responsible for the re-injection of the Oort cloud comets into the planetary region of the Solar System. Such comets, also called “new comets”, are the best candidates to become Halley type or “old” long period comets under the influence of the planetary gravitational attractions. Consequently, the flux of new comets represents the first stage of the long trip from the Oort cloud to the observable populations of comets. This is why so many studies are still devoted to this flux.

The different perturbers related to the Galactic environment of the Solar System, which have to be taken into account to explain the flux are reviewed. Special attention will be paid to the gravitational effects of stars passing close to the Sun and to the Galactic tides resulting from the difference of the gravitational attraction of the Galaxy on the Sun and on a comet. The synergy which takes place between these two perturbers is also described.

Keywords

celestial mechanicscomets: generalOort Cloudsolar system: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S263: Icy Bodies of the Solar System , August 2009 , pp. 57 - 66
Copyright
Copyright © International Astronomical Union 2010

References

Bailey, M. E. 1986, MNRAS, 218, 1CrossRefGoogle Scholar
Bailey, M. E. 1983, MNRAS, 204, 603CrossRefGoogle Scholar
Biermann, L. 1978, in: Reiz, A. & Andersen, T. (eds.), Astronomical Papers Dedicated to Bengt Stromgren, p. 327Google Scholar
Brasser, R. 2001, MNRAS, 324, 1109CrossRefGoogle Scholar
Brasser, R. 2008, A&A, 492, 251Google Scholar
Brasser, R., Duncan, M. J., & Levison, H. F. 2006, Icarus, 184, 59CrossRefGoogle Scholar
Brasser, R., Duncan, M. J., & Levison, H. F. 2007, Icarus, 191, 413CrossRefGoogle Scholar
Breiter, S., Dybczyński, P., & Elipe, A. 1996, A&A, 315, 618Google Scholar
Breiter, S. & Ratajczak, R. 2005, MNRAS, 364, 1222CrossRefGoogle Scholar
Breiter, S., Fouchard, M., & Ratajczak, R. 2008, MNRAS, 383, 200CrossRefGoogle Scholar
Byl, J. 1983, Earth Moon and Planets, 29, 121CrossRefGoogle Scholar
Byl, J. 1986, Earth Moon and Planets, 36, 263CrossRefGoogle Scholar
Chebotarev, G. A. 1964, Soviet Astronomy - AJ, 10, 341Google Scholar
Clube, S. V. M. & Napier, W. M. 1982, QJRAS, 23, 45Google Scholar
Delsemme, A. H. 1987, A&A, 187, 913Google Scholar
Dones, L., Weissman, P. R., Levison, H. F., & Duncan, M. J. 2004, Comets II, p. 153CrossRefGoogle Scholar
Duncan, M., Quinn, T., & Tremaine, S. 1987, AJ, 94, 1330CrossRefGoogle Scholar
Dybczyński, P. A. 2002, A&A, 396, 283Google Scholar
Emel'yanenko, V. V., Asher, D. J., & Bailey, M. E. 2007, MNRAS, 381, 779CrossRefGoogle Scholar
Fernández, J. A. 1980, Icarus, 42, 406CrossRefGoogle Scholar
Fernández, J. A. 1981, A&A, 96, 26Google Scholar
Ferández, J. A. 2005, in: Fernández, J. A. (ed.), Comets - Nature, Dynamics, Origin and their Cosmological Relevance, volume 328 of Astrophysics and Space Science LibraryCrossRefGoogle Scholar
Fouchard, M. 2004, MNRAS, 349, 347CrossRefGoogle Scholar
Heisler, J. 1990, Icarus, 88, 104CrossRefGoogle Scholar
Heisler, J. & Tremaine, S. 1986, Icarus, 65, 13CrossRefGoogle Scholar
Heisler, J., Tremaine, S., & Alcock, C. 1987, Icarus, 70, 269CrossRefGoogle Scholar
Hills, J. G. 1981, AJ, 86, 1730CrossRefGoogle Scholar
Hut, P. & Tremaine, S. 1985, AJ, 90, 1548CrossRefGoogle Scholar
Jakubík, M. & Neslušan, L. 2008, Contrib. Astron. Obs. Skalnaté Pleso, 38, 33Google Scholar
Kaib, N. A. & Quinn, T. 2008, Icarus, 197, 221CrossRefGoogle Scholar
Kaib, N. A. & Quinn, T. 2009, Science, to be publishedGoogle Scholar
Królikowska, M. 2006, AcA, 56, 385Google Scholar
Levison, H. F., Dones, L., & Duncan, M. J. 2001, AJ, 121, 2253CrossRefGoogle Scholar
Marsden, B. G. & Sekanina, Z. 1973, AJ, 78, 1118CrossRefGoogle Scholar
Matese, J. J. & Whitman, P. G. 1992, Celestial Mechanics and Dynamical Astronomy, 54, 13CrossRefGoogle Scholar
Matese, J. J. & Whitman, P. G. 1989, Icarus, 82, 389CrossRefGoogle Scholar
Matese, J. J. & Whitmire, D. 1996, ApJ Letters, 472, L41CrossRefGoogle Scholar
Matese, J. J. & Lissauer, J. J. 2002, Icarus, 157, 228CrossRefGoogle Scholar
Morris, D. E. & Muller, R. A. 1986, Icarus, 65, 1CrossRefGoogle Scholar
Napier, W. M. & Staniucha, M. 1982, MNRAS, 198, 723CrossRefGoogle Scholar
Oort, J. H. 1950, Bull. Astron. Inst. Neth., 11, 91Google Scholar
Öpik, E. 1932, Proceedings of the American Academy of Arts and ScienceGoogle Scholar
Remy, F. & Mignard, F. 1985 Icarus, 63, 1CrossRefGoogle Scholar
Rickman, H. 1976, Bulletin of the Astronomical Institutes of Czechoslovakia, 27, 92Google Scholar
Rickman, H., Fouchard, M., Froeschlé, Ch., & Valsecchi, G. B. 2008, Celestial Mechanics and Dynamical Astronomy, 102, 111CrossRefGoogle Scholar
Smoluchowski, R. & Torbett, M. 1984 Nature, 311, 38CrossRefGoogle Scholar
Torbett, M. 1986, MNRAS, 223, 885CrossRefGoogle Scholar
Weissman, P. R. 1979, in: Duncombe, R. L. (ed.), Dynamics of the Solar System, Proc. IAU Symposium No. 81, p. 277Google Scholar
Weissman, P. R. 1980, Nature, 288, 242CrossRefGoogle Scholar
Weissman, P. R. 1996, in: Rettig, T. & Hahn, J. M. (eds.), Completing the Inventory of the Solar System, Astronomical Society of the Pacific Conference Series, Vol. 107, p. 265Google Scholar
Wiegert, P. & Tremaine, S. 1999, Icarus, 137, 84CrossRefGoogle Scholar
Yabushita, S., Hasegawa, I., & Kobayashi, K. 1982, MNRAS, 200, 661CrossRefGoogle Scholar