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Abudusaimaitijiang Yisikandeer Chunhua Zhu Zhaojun Wang Guoliang Lü 《Journal of Astrophysics and Astronomy》2016,37(3):22
Using a method of population synthesis, we investigate the runaway stars produced by disrupted binaries via asymmetric core collapse supernova explosions (CC-RASs) and thermonuclear supernova explosions (TN-RASs). We find the velocities of CC-RASs in the range of about 30–100 km s ?1. The runaway stars observed in the galaxy are possibly CC-RASs. Due to differences in stellar chemical components and structures, TN-RASs are divided into hydrogen-rich TN-RASs and helium-rich TN-RASs. The velocities of the former are about 100–500 km s ?1, while the velocities of the latter are mainly between 600 and 1100 km s ?1. The hypervelocity stars observed in the galaxy may originate from thermonuclear supernova explosions. Our results possibly cover the US 708 which is a compact helium star and travels with a velocity of 1157 ±53 km s?1 in our galaxy. 相似文献
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