Probing the Proper Motion of the Central Compact Object in Puppis-A
Probing the Proper Motion of the Central Compact Object in Puppis-A
复制标题
探索 Puppis-A 中心致密天体的固有运动
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
W. Becker
中科院分区：
文献类型：
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作者：
C. Hui;W. Becker
欲了解更多信息，请联系：dhui@mpe.mpg.de摘要：利用钱德拉X射线卫星上的高分辨率相机（HRC-I）进行的两次观测，我们检查了中心致密天体RX J 0822 -4300可能的自行。发现RX J 0822 -4300的位置相差0.574±0.184角秒，这意味着107.49±34.46质量/年的自行，位置角为241±24度。对于2.2 kpc的距离，这种自行相当于1121.79±359.60 km/s的反冲速度。自行的大小和方向与RX J 0822 -4300的诞生地靠近超新星遗迹的光学膨胀中心相一致。虽然这是一个有希望的指示，一个快速移动的致密物体在超新星遗迹，相对较大的误差阻止任何限制性的结论。
For further information, please contact: dhui@mpe.mpg.de ABSTRACT: Using two observations taken with the High Resolution Camera (HRC-I) aboard the Chandra X-ray satellite, we have examined the central compact object RX J0822-4300 for a possible proper motion. The position of RX J0822-4300 is found to be different by 0.574±0.184 arcsec, implying a proper motion of 107.49±34.46 mas/yr with a position angle of 241±24 degree. For a distance of 2.2 kpc, this proper motion is equivalent to a recoil velocity of 1121.79±359.60 km/s. Both the magnitude and the direction of the proper motion are in agreement with the birth place of RX J0822-4300 being near to the optical expansion center of the supernova remnant. Although this is a promissing indication of a fast moving compact object in a supernova remnant, the relative large error prevents any constraining conclusion.