arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0708.2002astro-ph
收藏

测量超新星遗迹RX J1713西南部400 eV到40 keV的宽波段X射线谱。7 -3946

Measuring the Broad-band X-Ray Spectrum from 400 eV to 40 keV in the Southwest Part of the Supernova Remnant RX J1713.7-3946

Tadayuki Takahashi, Takaaki Tanaka, Yasunobu Uchiyama, Junko S. Hiraga, Kazuhiro Nakazawa, Shin Watanabe, Aya Bamba, John P. Hughes, Hideaki Katagiri, Jun Katao… 展开作者

Tadayuki Takahashi, Takaaki Tanaka, Yasunobu Uchiyama, Junko S. Hiraga, Kazuhiro Nakazawa, Shin Watanabe, Aya Bamba, John P. Hughes, Hideaki Katagiri, Jun Kataoka, Motohide Kokubun, Katsuji Koyama, Koji Mori, Robert Petre, Hiromitsu Takahashi, Yoko Tsuboi

摘要:

我们报告的结果朱雀宽带X射线观测的西南部的银河系超新星遗迹(SNR)RX J1713.7-3946的能量覆盖范围为0.4-40千电子伏。X射线光谱,大概是同步辐射源,是已知的完全无线,使这种SNR非常适合于详细研究的X射线光谱形状形成的有效粒子加速在高速冲击。通过朱雀号上HXD PIN的灵敏硬X射线测量,我们确定了12- 40 keV范围内的硬X射线光谱,该光谱由幂律描述,光子指数γ = 3.2+/- 0.2,明显比以前ASCA和其他任务测量的伽马= 2.4+/- 0.05的软X射线指数陡。我们发现,一个简单的幂律无法描述0.4-40 keV的全光谱范围,而是一个幂律与硬指数伽玛= 1.50+/- 0.09和高能量截止γ_c = 1.2+/- 0.3 keV的指数截止形式上提供了一个很好的拟合在整个带通。如果我们使用所谓的SRCUT模型作为替代模型,则它给出了epsilon_{roll} = 0.95+/- 0.04 keV的最佳拟合滚降能量。与最近通过HESS观测获得的0.3至100 TeV的TeV伽马射线谱一起,我们对RX J1713.7-3946的朱雀观测提供了对超新星冲击中加速的最高能量粒子的严格约束。

英文摘要:

We report on results from Suzaku broadband X-ray observations of the southwest part of the Galactic supernova remnant (SNR) RX J1713.7-3946 with an energy coverage of 0.4-40 keV. The X-ray spectrum, presumably of synchrotron origin, is known to be completely lineless, making this SNR ideally suited for a detailed study of the X-ray spectral shape formed through efficient particle acceleration at high speed shocks. With a sensitive hard X-ray measurement from the HXD PIN on board Suzaku, we determine the hard X-ray spectrum in the 12--40 keV range to be described by a power law with photon index Gamma = 3.2+/- 0.2, significantly steeper than the soft X-ray index of Gamma = 2.4+/- 0.05 measured previously with ASCA and other missions. We find that a simple power law fails to describe the full spectral range of 0.4-40 keV and instead a power-law with an exponential cutoff with hard index Gamma = 1.50+/- 0.09 and high-energy cutoff epsilon_c = 1.2+/- 0.3 keV formally provides an excellent fit over the full bandpass. If we use the so-called SRCUT model, as an alternative model, it gives the best-fit rolloff energy of epsilon_{roll} = 0.95+/- 0.04 keV. Together with the TeV gamma-ray spectrum ranging from 0.3 to 100 TeV obtained recently by HESS observations, our Suzaku observations of RX J1713.7-3946 provide stringent constraints on the highest energy particles accelerated in a supernova shock.

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。

↑