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arXiv 2005.09457astro-ph.HE
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超新星残余船尾座A中中心致密天体RX J0822-4300的自行

The Proper Motion of the Central Compact Object RX J0822-4300 in the Supernova Remnant Puppis A, Revisited

Martin Mayer, Werner Becker, Daniel Patnaude, P. Frank Winkler, Ralph Kraft

摘要:

我们提出了一个改进的自行测量的中心紧凑对象RX J 0822 -4300,位于超新星遗迹船尾座A。通过使用钱德拉X射线天文台上的高分辨率相机于2019年2月拍摄的新数据集,我们将分析的可用时间基线增加了约一倍,略高于19年(7000天)。我们纠正天体测量的不准确性钱德拉使用校准星与已知的光学位置,在所有的观测。因此,我们得到的RX J 0822 -4300的绝对位置精确到$0.1^{\prime\prime}$周围,并从这些一个新的最佳估计其总自行$μ_{\rm tot}= (80.4 \pm 7.7)\,\rm{mas\,yr}^{-1}$。对于2 kpc的剩余距离,这对应于位置角为$ϕ_0 = (247.8 \pm 4.4)^{\circ}$时的预计反冲速度为$(763 \pm 73)\, \rm{km\,s}^{-1}$。本文利用RXJ 0822 -4300自行测量值讨论了船尾座A的运动学年龄。

英文摘要:

We present an improved proper motion measurement of the central compact object RX J0822-4300, located in the supernova remnant Puppis A. By employing a new data set taken in February 2019 by the High Resolution Camera aboard the Chandra X-ray Observatory, we approximately double the available temporal baseline for our analysis to slightly more than 19 years (7000 days). We correct for the astrometric inaccuracy of Chandra using calibrator stars with known optical positions that are detected in all observations. Thereby, we obtain absolute positions of RX J0822-4300 accurate to around $0.1^{\prime\prime}$ and from these a new best estimate for its total proper motion of $μ_{\rm tot}= (80.4 \pm 7.7)\,\rm{mas\,yr}^{-1}$. For a remnant distance of 2 kpc, this corresponds to a projected kick velocity of $(763 \pm 73)\, \rm{km\,s}^{-1}$ at a position angle of $ϕ_0 = (247.8 \pm 4.4)^{\circ}$. The proper motion measurement of RX J0822-4300 is used for discussing the kinematic age of Puppis A.

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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