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首页> 外文期刊>The Astrophysical journal >Separated at Birth: The Origin of the Pulsars B2020+28 and B2021+51 in the Cygnus Superbubble
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Separated at Birth: The Origin of the Pulsars B2020+28 and B2021+51 in the Cygnus Superbubble

机译:出生时分开:天鹅座超气泡中脉冲星B2020 + 28和B2021 + 51的起源

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摘要

High-precision astrometric data have enabled us to determine the trajectories through the Galactic potential for a growing number of pulsars. This has resulted in the discovery of a pulsar pair (B2020+28 and B2021+51) that has a common origin in the Cygnus superbubble or in one of its related OB associations at an epoch that is comparable to the spin-down ages of the pulsars. Analysis of the Galactic orbits indicates that the progenitors of the pulsars had similar masses and were in a binary system that was disrupted after the second supernova explosion. The implied pulsar birth velocities are consistent with the high velocities of neutron stars in general. The initial spin period of the pulsar that was formed in the second supernova explosion was ~200 ms. A further increase in astrometric accuracy will allow us to more tightly constrain the birth velocities and the kick velocities that were imparted by the two supernova explosions. Two additional pulsars in the sample of 24 with parallax measurements may also have originated in the Cygnus superbubble.
机译:高精度的天文数据使我们能够通过银河系潜力来确定越来越多的脉冲星的轨迹。这导致发现了一个脉冲星对(B2020 + 28和B2021 + 51),该脉冲星对在天鹅座超级泡沫或其相关的OB关联之一中具有共同的起源,可与该时期的旋转年龄相媲美。脉冲星。对银河轨道的分析表明,脉冲星的祖先具有相似的质量,并且处于第二次超新星爆炸后被破坏的双星系统。一般而言,隐含的脉冲星诞生速度与中子星的高速一致。在第二次超新星爆炸中形成的脉冲星的初始自旋周期约为200毫秒。天文测量精度的进一步提高将使我们能够更严格地限制两次超新星爆炸所赋予的出生速度和反冲速度。在24个具有视差测量的样本中,另外两个脉冲星也可能起源于天鹅座超气泡。

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