Encounters of the Sun with nearby stars in the past and future |
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| Authors: | AA Mülläri VV Orlov |
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| Affiliation: | 1. Department of Mathematics, Petrozavodsk State University, Lenin prospect 33, 185640, Petrozavodsk, Russia
2. Astronomical Institute, St. Petersburg State University, Bibliotechnaya pl. 2, 198904, St. Petersburg Peterhof, Russia
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| Abstract: | The relative space motions of the Sun and nearby stars are considered. The coordinates and velocities of the stars are taken from the Catalogue of Nearby Stars by Gliese and Jahreiss (1991). The minimum space separation between the Sun and every star as well as the corresponding moment of time are calculated by two ways. Firstly, the straight line motions are considered. Secondly, the effect of the Galaxy potential is taken into account. The Galaxy model proposed by Kutuzov and Ossipkov (1989) is used. Twenty five stars approaching the Sun closer than two parsecs are selected. The effects of the uncertainties in the observational data are studied. The influence of the encounters to the Oort cloud is discussed. |
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