论文标题
中央紧凑型物体RX J0822-4300在超新星残留幼犬中的适当运动，重新审视
The Proper Motion of the Central Compact Object RX J0822-4300 in the Supernova Remnant Puppis A, Revisited
论文作者
论文摘要
我们通过采用Chandra X射线观测机上的高分辨率摄像头在2019年2月在2019年2月进行的新数据集，对位于Supernova Remnant Puppis A中的Central Compact对象RX J0822-4300进行了改进的适当运动测量，我们将在2019年2月进行了新的数据集，我们将大约两倍的临时基线，以便我们的分析大约是超过19年（超过19年）（7000天）。我们使用具有已知光学位置的校准星校正Chandra的天体不准确性，这些位置在所有观测值中都被检测到。因此，我们获得了RX J0822-4300的绝对位置准确至$ 0.1^{\ prime \ prime} $，并且从这些方面是新的最佳估计，因为它的总正确运动$μ_ {\ rm tot} =（80.4 \ pm 7.7 \ pm 7.7）对于2 kpc的残余距离，这对应于$（763 \ pm 73）\，\ rm {km \，s}^{ - 1} $的投影踢速度的位置角度为$ ϕ_0 =（247.8 \ pm 4.4）^{\ circ} $。 RX J0822-4300的适当运动测量用于讨论幼犬的运动学时代。
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.
