期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 696, 期 1, 页码 L13-L16出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/696/1/L13
关键词
Galaxy: kinematics and dynamics; Galaxy: stellar content; solar system: formation; solar system: general; Sun: general
The anomalous chemical abundances and the structure of the Edgeworth-Kuiper belt observed in the solar system constrain the initial mass and radius of the star cluster in which the Sun was born to M similar or equal to 500-3000M(circle dot) and R similar or equal to 1-3 pc. When the cluster dissolved, the siblings of the Sun dispersed through the galaxy, but they remained on a similar orbit around the Galactic center. Today these stars hide among the field stars, but 10-60 of them are still present within a distance of similar to 100 pc. These siblings of the Sun can be identified by accurate measurements of their chemical abundances, positions, and their velocities. Finding even a few will strongly constrain the parameters of the parental star cluster and the location in the Galaxy where we were born.
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