Chandra Observations of a Nonthermal Supernova Remnant Candidate AX J1843.8–0352 and Its Surroundings
Chandra Observations of a Nonthermal Supernova Remnant Candidate AX J1843.8–0352 and Its Surroundings
复制标题
DOI：
10.1086/368355
复制
发表时间：
2003-01
期刊：
影响因子：
--
通讯作者：
M. Ueno;A. Bamba;K. Koyama;K. Ebisawa
中科院分区：
文献类型：
--
作者：
M. Ueno;A. Bamba;K. Koyama;K. Ebisawa
我们介绍了最近用ASCA发现的超新星遗迹AX J1843.8-0352的Chandra结果。钱德拉空间解决了两个组件从这个SNR：一个非热，一个热。非热分量的形态为团块状、椭圆形，自北向南拉长，平均直径约9 '。光谱符合光子指数为2.1的幂律模型，东边缘与非热射电源C和F有关。因此，非热成分可能是同步加速器X射线产生的高能电子加速壳的SNR。热分量是位于非热分量内的最亮的团块，并且示出了约0.7keV温度的薄等离子体的光谱。一个值得注意的发现是它独特的形态;一个50 "× 30"大小的头部靠近SNR的东南边缘，一个30“长的“喷流”指向西南。虽然这种辐射与射电源F的西部有关，但其吸收比非热X射线或SNR辐射的大部分大2倍。因此，目前还不清楚这种奇特的等离子体是与AX J1843.8-0352有关的热成分，AX J1843.8-0352是位于我们银河系远端的银河系源，还是河外源。
We present the Chandra results of AX J1843.8-0352, a supernova remnant (SNR) recently identified with ASCA. Chandra spatially resolved two components from this SNR: one nonthermal and one thermal. The morphology of the nonthermal component is clumpy and elliptical, elongated from the north to the south with a mean diameter of about 9'. The spectrum is fitted with a power-law model of photon index 2.1, and the east rim is associated with the nonthermal radio sources C and F. Therefore, the nonthermal component is probably synchrotron X-rays produced by energetic electrons accelerated at the shell of the SNR. The thermal component is the brightest clump located within the nonthermal component and shows the spectrum of a thin plasma of about 0.7 keV temperature. A notable discovery is its peculiar morphology; a head of 50′′ × 30′′ size near the southeast rim of the SNR and a 30'' long "jet" pointing to the southwest. Although this emission is associated with the western part of the radio source F, the absorption is 2 times larger than that of the nonthermal X-rays or the bulk of the SNR emission. Therefore, it is unclear whether this peculiar plasma is a thermal component associated with AX J1843.8-0352, a Galactic source located in the far side of our Galaxy, or an extragalactic source.