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| HAL: hal-00664340, version 1 |
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| LAL Workshop: Dynamics and formation of the Oort cloud, Observatoire de Lille, Lille : France (2011) |
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| The long and short term synergy between galactic and stellar perturbations |
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| Hans Rickman 1Marc Fouchard 2, 3 |
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| (2011-09-27) |
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| In 2008 we showed by Monte Carlo simulations of the long-term dynamical evolution of the Oort Cloud that the current comet injection rate estimated from a complete model including both Galactic tides and passing stars by far exceeds the sum of the predictions from models using only tides or stars. We have since then investigated in detail the origin of this synergy, and the results of this work will be summarized and explained. The long-term synergy caused by filling of the Tidally Active Zone will first be reviewed, and then we turn to the 'real-time' synergy occurring due to the combined tidal and star induced dynamics during the last revolution of injected comets. We pay particular attention to the likelihood of identifying the main culprit stars using astrometric surveys (Hipparcos and Gaia), showing that the latter holds promise for revealing the origin of observed new comets. |
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| 1: | Uppsala astronomical observatory |
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Uppsala University |
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| 2: | Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE) |
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CNRS : UMR8028 – INSU – Observatoire de Paris – Université Pierre et Marie Curie [UPMC] - Paris VI – Université Lille I - Sciences et technologies |
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| 3: | Laboratoire d'Astronomie de Lille (LAL) |
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Université Lille I - Sciences et technologies – CNRS : UMR8028 |
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| 4: | Laboratoire de Cosmologie, Astrophysique Stellaire & Solaire, de Planétologie et de Mécanique des Fluides (CASSIOPEE) |
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Université Nice Sophia Antipolis [UNS] – CNRS : UMR6202 – Observatoire de la Côte d'Azur – INSU |
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| 5: | Istituto di Astrofisica Spaziale e Fisica cosmica - Roma (IASF-Roma) |
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INAF |
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| Subject | : | Sciences of the Universe/Astrophysics/Earth and Planetary Astrophysics Physics/Astrophysics/Earth and Planetary Astrophysics |
| hal-00664340, version 1 | |
| http://hal.upmc.fr/hal-00664340 | |
| oai:hal.upmc.fr:hal-00664340 | |
| From: Camille Baron | |
| Submitted on: Monday, 30 January 2012 13:37:59 | |
| Updated on: Monday, 30 January 2012 13:37:59 | |
