Encounters of the Sun with Nearby Stars in the Past and Future

Details Encounters of the Sun with Nearby Stars in the Past and Future Encounters of the Sun with Nearby Stars in the Past and Future

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996em%26p...72...19m&link_type=abstract

Earth, Moon and Planets, Volume 72, Issue 1-3, pp. 19-23

Physics

6

Solar Neighbourhood, Oort Comet Cloud

Scientific paper

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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