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arXiv 0705.4192astro-ph
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出生前分离:双星B2020 +28和B2021 +51是逃逸恒星的残余

Separated before birth: pulsars B2020+28 and B2021+51 as the remnants of runaway stars

V. V. Gvaramadze

摘要:

双星B2020+28和B2021+51的天体测量数据表明,它们起源于天鹅座OB2星协方向上的几个秒差距内。有人提出,这两颗脉冲星起源于一个共同的大质量双星,并在不对称超新星爆炸后第二颗脉冲星诞生时分离。我们考虑一个不同的情况下的脉冲星对的起源的基础上的一种可能性,即在他们的出生前分离,他们是逃逸恒星的残余物从天鹅座OB2的核心喷射(与速度类似的脉冲星)由于强大的三体或四体动力学遇到。我们的方案不需要超新星爆炸的任何不对称性。

英文摘要:

Astrometric data on the pulsars B2020+28 and B2021+51 suggest that they originated within several parsecs of each other in the direction of the Cyg OB2 association. It was proposed that the pulsars share their origin in a common massive binary and were separated at the birth of the second pulsar following the asymmetric supernova explosion. We consider a different scenario for the origin of the pulsar pair based on a possibility that the pulsars were separated before their birth and that they are the remnants of runaway stars ejected (with velocities similar to those of the pulsars) from the core of Cyg OB2 due to strong three- or four-body dynamical encounters. Our scenario does not require any asymmetry in supernova explosions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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