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arXiv 1104.2894astro-ph.GA
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银道面超新星遗迹的Mipsgal观

The Mipsgal View of Supernova Remnants in the Galactic Plane

D. Pinheiro Goncalves, A. Noriega-Crespo, R. Paladini, P. G. Martin, S. J. Carey

摘要:

本文报道了利用斯皮策太空望远镜上的多波段成像光度计(MIPS)在中红外波段(24和70 μm),在10 < l < 65度和285 < l < 350度,|b| < 1度的坐标范围内探测到的银河系超新星遗迹(SNRs)。我们在Green的目录中搜索SNR的红外对应物,并在121个中识别出39个,即,检测率约为32%。这种相对较低的检测分数主要是由于与附近的前景/背景源和漫射发射的混淆。我们样本中的SNR显示[F8/F24]与[F70/F24]呈线性趋势。我们比较了它们的红外辐射通量和1.4GHz的射电辐射通量,发现大多数遗迹的信噪比都在70 μm和1.4GHz之间(少数遗迹的信噪比更接近H II区)。此外,当红外(24和70 μm)与1.4 GHz发射相关时,我们获得了接近1的斜率。我们的调查在探测具有明亮X射线发射的残留物方面更为成功,我们发现这与24 μm的形态有很好的相关性。此外,通过比较X射线、红外线和无线电发射的能量,我们得出结论,红外线释放的能量与X射线范围内的冷却相当。

英文摘要:

We report the detection of Galactic supernova remnants (SNRs) in the mid-infrared (at 24 and 70 μm), in the coordinate ranges 10 < l < 65 deg and 285 < l < 350 deg, |b| < 1 deg, using the Multiband Imaging Photometer (MIPS) aboard the Spitzer Space Telescope. We search for infrared counterparts to SNRs in Green's catalog and identify 39 out of 121, i.e., a detection rate of about 32%. Such a relatively low detection fraction is mainly due to confusion with nearby foreground/background sources and diffuse emission. The SNRs in our sample show a linear trend in [F8/F24] versus [F70/F24]. We compare their infrared fluxes with their corresponding radio flux at 1.4 GHz and find that most remnants have ratios of 70 μm to 1.4 GHz characteristic of SNRs (with the exception of a few which have ratios closer to those of H II regions). Furthermore, we retrieve a slope close to unity when correlating infrared (24 and 70 μm) with 1.4 GHz emission. Our survey is more successful in detecting remnants with bright X-ray emission, which we find is well correlated with the 24 μm morphology. Moreover, by comparing the power emitted in X-ray, infrared and radio, we conclude that the energy released in the infrared is comparable to the cooling in the X-ray range.

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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