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arXiv 0906.0216astro-ph.HE
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用朱雀星探测RX J0852 .0--4622超新星遗迹的Sc-K谱线

Search for Sc-K line emission from RX J0852.0--4622 Supernova remnant with Suzaku

Junko S. Hiraga, Y. Kobayashi, T. Tamagawa, A. Hayato, A. Bamba, Y. Terada, R. Petre, H. Katagiri, H. Tsunemi

摘要:

我们使用朱雀XIS数据从超新星遗迹RX J0852.0-4622的西北边缘寻找4keV左右的线发射证据。有几篇论文报道了在这个天空区域探测到4.1keV左右的发射线。这条谱线是由Sc的K带荧光产生的,Sc是44 Ti的直接衰变产物。我们进行了光谱分析的整个部分西北边缘的残余在XIS的视野,以及各个地区对应的地区发表声明的线发射。我们在4.1 keV附近没有发现任何线发射,因此能够对X射线通量设定一个严格的上限:整个场的X射线通量为1.1 × 10 ^-6 s^-1 cm^-2。对于每个区域,我们的通量上限低于先前声称的检测。因此,我们得出结论,到目前为止,在RX J0852.0-4622的西北边缘没有检测到来自Sc-K发射的明确X射线线特征。我们的负检测支持最近的说法,即RX J 0852 -4622既不年轻(1700- 4000年),也不接近(~750 pc)。

英文摘要:

We searched for evidence of line emission around 4keV from the northwestern rim of the supernova remnant RX J0852.0-4622 using Suzaku XIS data. Several papers have reported the detection of an emission line around 4.1keV from this region of the sky. This line would arise from K-band fluorescence by Sc, the immediate decay product of 44Ti. We performed spectral analysis for the entire portion of the NW rim of the remnant within the XIS field of view, as well as various regions corresponding to regions of published claims of line emission. We found no line emission around 4.1keV anywhere, and are able to set a restrictive upper limit to the X-ray flux: 1.1x10^-6 s^-1 cm^-2 for the entire field. For every region, our flux upper limit falls below that of the previously claimed detection. Therefore, we conclude that, to date, no definite X-ray line feature from Sc-K emission has been detected in the NW rim of RX J0852.0-4622. Our negative-detection supports the recent claim that RX J0852-4622 is neither young (1700--4000 yr) nor nearby(~750 pc).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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