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arXiv 0705.3269astro-ph
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双脉冲星系统J0737-3039的年龄约束

Age constraints in the double pulsar system J0737-3039

D. R. Lorimer, P. C. C. Freire, I. H. Stairs, M. Kramer, M. A. McLaughlin, M. Burgay, S. E. Thorsett, R. J. Dewey, A. G. Lyne, R. N. Manchester, N. D'Amico, A. … 展开作者

D. R. Lorimer, P. C. C. Freire, I. H. Stairs, M. Kramer, M. A. McLaughlin, M. Burgay, S. E. Thorsett, R. J. Dewey, A. G. Lyne, R. N. Manchester, N. D'Amico, A. Possenti, B. C. Joshi

摘要:

我们调查的年龄限制,可以放在双脉冲星系统使用模型的第一个出生的22.7毫秒脉冲星A和2.77秒脉冲星B的特征年龄分别为210和50万年的自旋下降。标准模型假设两颗恒星的偶极自旋都是向下的,这表明B星形成的时间大约是5000万年,即接近B星的特征年龄。然而,采用的模型,占的影响A的相对论风B的自旋下降,我们发现,B的形成发生在80或1.8亿年前,这取决于相互作用机制。形成于8000万年前,更接近B的特征年龄,将导致J 0737 -3039对双中子星双星合并率的贡献增加40%。1.8亿年的年龄更接近A的特征年龄,并且与最近对聚结速率的估计一致。新的年龄限制并没有显着影响最近的估计踢速度,倾斜角之间的前和后超新星轨道平面或前超新星质量的B的祖先。

英文摘要:

We investigate the age constraints that can be placed on the double pulsar system using models for the spin-down of the first-born 22.7-ms pulsar A and the 2.77-s pulsar B with characteristic ages of 210 and 50 Myr respectively. Standard models assuming dipolar spin-down of both pulsars suggest that the time since the formation of B is ~50 Myr, i.e. close to B's characteristic age. However, adopting models which account for the impact of A's relativistic wind on B's spin-down we find that the formation of B took place either 80 or 180 Myr ago, depending the interaction mechanism. Formation 80 Myr ago, closer to B's characteristic age, would result in the contribution from J0737-3039 to the inferred coalescence rates for double neutron star binaries increasing by 40%. The 180 Myr age is closer to A's characteristic age and would be consistent with the most recent estimates of the coalescence rate. The new age constraints do not significantly impact recent estimates of the kick velocity, tilt angle between pre and post-supernova orbital planes or pre-supernova mass of B's progenitor.

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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