Direct Measurement of Neutron Star Recoil in the Oxygen-rich Supernova Remnant Puppis A
Direct Measurement of Neutron Star Recoil in the Oxygen-rich Supernova Remnant Puppis A
复制标题
富氧超新星遗迹 Puppis A 中中子星反冲的直接测量
DOI：
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发表时间：
2006
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影响因子：
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通讯作者：
R. Petre
中科院分区：
文献类型：
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作者：
P. Winkler;R. Petre
钱德拉 X 射线天文台高分辨率相机在五年内拍摄的三张图像序列揭示了 RX J0822-4300 的角秒级位移，RX J0822-4300 是船尾座 A 超新星遗迹中心附近的恒星遗迹（可能是中子星）。我们测得它的自行运动为 0.165″ ± 0.025″ yr-1 向西南偏西方向移动。在 2 kpc 的距离处，这对应于 ~1600 km s-1 的横向空间速度。空速与从富氧光纤自行推断出的爆炸中心一致，并证实了船尾座 A 是由不对称爆炸产生的，伴随着踢击，向恒星残骸传递了大约 3×1049 尔格的动能（约为典型超新星动能的 3%）。我们讨论了为解释中子星踢速度而提出的核心塌缩超新星模型的限制。
A sequence of three Chandra X-Ray Observatory High Resolution Camera images taken over a span of five years reveals arcsecond-scale displacement of RX J0822-4300, the stellar remnant (presumably a neutron star) near the center of the Puppis A supernova remnant. We measure its proper motion to be 0.165′′ ± 0.025′′ yr-1 toward the west-southwest. At a distance of 2 kpc, this corresponds to a transverse space velocity of ~1600 km s-1. The space velocity is consistent with the explosion center inferred from proper motions of the oxygen-rich optical filaments and confirms the idea that Puppis A resulted from an asymmetric explosion accompanied by a kick that imparted roughly 3×1049 ergs of kinetic energy (some 3% of the kinetic energy for a typical supernova) to the stellar remnant. We discuss constraints on core-collapse supernova models that have been proposed to explain neutron star kick velocities.