Stars outside the Hipparcos list closely encountering the Solar system

被引:16
作者
Bobylev, V. V. [1 ]
机构
[1] Russian Acad Sci, Pulkovo Astron Observ, St Petersburg 196140, Russia
来源
ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS | 2010年 / 36卷 / 11期
基金
俄罗斯基础研究基金会;
关键词
stellar kinematics; Oort cloud; GJ; 3323; 3379; Solar System; Galaxy (Milky Way); LOW-MASS STARS; OORT CLOUD; RADIAL-VELOCITIES; PROPER MOTIONS; STELLAR ENCOUNTERS; FUNDAMENTAL ROLE; CATALOG; COMETS; DENSITY; SUN;
D O I
10.1134/S1063773710110071
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Based on currently available kinematic data, we have searched for stars outside the Hipparcos list that either closely encountered in the past or will encounter in the future the Solar system within several parsecs. For the first time, we have identified two single stars, GJ 3379 (G 099-049) and GJ 3323 (LHS 1723), as candidate for a close encounter with the solar orbit. The star GJ 3379 could encounter the Sunmore closely to aminimumdistance d (min) = 1.32 +/- 0.03 pc at time t (min) = -163 +/- 3 thousand years. We have found two potential candidates for a close encounter that have only photometrical distances: the white dwarf SSSPM J1549-3544 without any data on its radial velocity and the L-dwarf SDSS J1416+1348. The probabilities of their penetration into the Oort cloud region are 0.09 (at a model radial velocity < V (r) < = 50 km s(-1)) and 0.05, respectively.
引用
收藏
页码:816 / 822
页数:7
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