论文标题
RX J1713.7 $ - 3946 $ 3946在Chandra X射线观察中证明
Shock-Cloud Interaction in the Southwestern Rim of RX J1713.7$-$3946 Evidenced by Chandra X-ray Observations
论文作者
论文摘要
我们报告了Chandra X射线观测的结果，该观测值是Supernova Remnant（SNR）RX J1713.7 $ -3946的Supernova Remnant（SNR）RX。我们在可能对应于SNR的正向冲击的区域中测量两个X射线明亮斑点，称为Blobs A和B。测得的速度为$ 3800 \ pm 100〜 \ MATHRM {km}〜\ MATHRM {s}^{ - 1} $和$ 2300 \ pm 200〜 \ Mathrm {km}〜\ Mathrm {s}^{s}^{ - 1} $ for Blobs a and a and a and a and a and a and a和b。由于密集的分子团块位于斑点B附近，因此其速度较慢，归因于冲击云的相互作用导致冲击减速。该结果提供了可靠的证据表明，RX J1713.7 $ - $ 3946的正向冲击确实与文献中报道的无线电观察结果发现的密集气体相撞。这两个斑点的位置和速度差异导致估计，冲击遇到了密集的气体$ \ sim $ \ sim 100〜 \ mathrm {yr} $ ogo。冲击速度以及斑点同步加速器X射线光谱的截止能，表明这些区域中的颗粒加速度接近BOHM极限。尤其是斑点B几乎处于极限，以最快的速度加速颗粒。我们讨论了冲击云相互作用对粒子加速度效率的可能影响。
We report on results of Chandra X-ray observations of the southwestern part of the supernova remnant (SNR) RX J1713.7$-$3946. We measure proper motions of two X-ray bright blobs, named Blobs A and B, in regions presumably corresponding to the forward shock of the SNR. The measured velocities are $3800 \pm 100~\mathrm{km}~\mathrm{s}^{-1}$ and $2300 \pm 200~\mathrm{km}~\mathrm{s}^{-1}$ for Blobs A and B, respectively. Since a dense molecular clump is located close to Blob B, its slower velocity is attributed to shock deceleration as a result of a shock-cloud interaction. This result provides solid evidence that the forward shock of RX J1713.7$-$3946 is indeed colliding with dense gas discovered through radio observations reported in the literature. The locations and velocity differences of the two blobs lead to an estimate that the shock encountered with the dense gas $\sim 100~\mathrm{yr}$ ago. The shock velocities, together with cutoff energies of the synchrotron X-ray spectra of the blobs, indicate that particle acceleration in these regions is close to the Bohm limit. Blob B, in particular, is almost at the limit, accelerating particles at the fastest possible rate. We discuss possible influence of the shock-cloud interaction on the efficiency of particle acceleration.
