NONTHERMAL X-RAY EMISSION IN THE N11 SUPERBUBBLE IN THE LARGE MAGELLANIC CLOUD
NONTHERMAL X-RAY EMISSION IN THE N11 SUPERBUBBLE IN THE LARGE MAGELLANIC CLOUD
复制标题
大麦哲伦云中 N11 超级气泡的非热 X 射线发射
DOI：
10.1088/0004-637x/699/1/911
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Y. Chu
中科院分区：
文献类型：
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作者：
L. Maddox;R. Williams;B. Dunne;Y. Chu
本文报道了大麦哲伦云H Ⅱ复合体N11中OB星协LH 9周围超气泡的X射线光谱分析结果。利用朱雀的观测数据，我们模拟了能量范围为0.2-7.5 keV的X射线发射。我们约束的热谱低于2千电子伏，使用热等离子体模型中发现的N11区域的先前XMM-牛顿研究。我们发现，硬X射线发射（>2 keV）需要一个非热的幂律分量。发现该组分的光子指数为Γ = 1.72 ± 0.15。我们使用LH 9的已知恒星含量对N11进行了能量收支分析。我们发现，观测到的热量和动能的SB是只有一半的预期的机械能注入恒星。
We present the results of X-ray spectral analysis of the superbubble (SB) around the OB association LH9 in the H ii complex N11 in the Large Magellanic Cloud. Using observations from Suzaku, we have modeled the X-ray emission over the energy range 0.2–7.5 keV. We constrained the thermal spectrum below 2 keV using a thermal plasma model found in a previous XMM-Newton study of the N11 region. We find that the hard X-ray emission (>2 keV) requires a nonthermal power-law component. The photon index of this component was found to be Γ = 1.72 ± 0.15. We performed an energy budget analysis for N11 using the known stellar content of LH9. We found that the observed thermal and kinetic energy in the SB is only half of the expected mechanical energy injected by stars.