大麦云云中DEM L299的多频研究
Multi-frequency study of DEM L299 in the Large Magellanic Cloud
摘要：
我们研究了大麦云中的HII区域DEM L299，以了解其在不同波长下的物理特征和形态。我们进行了存档XMM-牛顿EPIC数据的光谱分析，并研究了X射线，光学和无线电波长的DEM L299的形态。我们使用了来自麦哲伦云发射谱线巡天的H α、[SII]和[OIII]数据，以及来自澳大利亚望远镜紧凑阵列（ATCA）和帕克斯望远镜的射电21厘米谱线数据，以及来自ATCA和莫隆格洛合成望远镜的射电连续谱数据。我们的形态学研究意味着，除了超新星遗迹SNR B 0543 -68.9在以前的研究报告，一个超级气泡也重叠的SNR的投影。SNR的位置通过[SII]/H α通量比图像明确定义。此外，光学图像显示了一个位于更远的北方的壳状结构，充满了漫射X射线发射，这再次表明了超级气泡。无线电21厘米线数据显示两个物体周围都有一个贝壳。射电连续谱数据显示，在DEM L299的位置上存在弥散辐射，与位于其西南的HII区N164明显不同，SNR B 0543 -68.9的光谱指数α =-0.34，表明热辐射占主导地位，因此SNR相当成熟。我们确定的SNR，超级气泡，和一个可能的井喷区域的气泡，建议的光学和X射线数据的扩散X射线发射的基本属性。我们得到SNR的年龄为8.9（3.5-18.1）kyr，SNR内部热气体的温度为0.64（0.44-1.37）keV，超气泡内部热气体的温度为0.74（0.44-1.1）keV。我们得出结论，DEM L299由SNR B 0543 -68.9和超级气泡的叠加组成，我们根据光学数据识别出超级气泡。
英文摘要：
We have studied the HII region DEM L299 in the Large Magellanic Cloud to understand its physical characteristics and morphology in different wavelengths. We performed a spectral analysis of archived XMM-Newton EPIC data and studied the morphology of DEM L299 in X-ray, optical, and radio wavelengths. We used H alpha, [SII], and [OIII] data from the Magellanic Cloud Emission Line Survey and radio 21 cm line data from the Australia Telescope Compact Array (ATCA) and the Parkes telescope, and radio continuum data from ATCA and the Molonglo Synthesis Telescope. Our morphological studies imply that, in addition to the supernova remnant SNR B0543-68.9 reported in previous studies, a superbubble also overlaps the SNR in projection. The position of the SNR is clearly defined through the [SII]/H alpha flux ratio image. Moreover, the optical images show a shell-like structure that is located farther to the north and is filled with diffuse X-ray emission, which again indicates the superbubble. Radio 21 cm line data show a shell around both objects. Radio continuum data show diffuse emission at the position of DEM L299, which appears clearly distinguished from the HII region N 164 that lies south-west of it. We determined the spectral index of SNR B0543-68.9 to be alpha=-0.34, which indicates the dominance of thermal emission and therefore a rather mature SNR. We determined the basic properties of the diffuse X-ray emission for the SNR, the superbubble, and a possible blowout region of the bubble, as suggested by the optical and X-ray data. We obtained an age of 8.9 (3.5-18.1) kyr for the SNR and a temperature of 0.64 (0.44-1.37) keV for the hot gas inside the SNR, and a temperature of the hot gas inside the superbubble of 0.74 (0.44-1.1) keV. We conclude that DEM L299 consists of a superposition of SNR B0543-68.9 and a superbubble, which we identified based on optical data.
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