New identification of the mixed-morphology supernova remnant G298.6-0.0 with possible gamma-ray association
New identification of the mixed-morphology supernova remnant G298.6-0.0 with possible gamma-ray association
复制标题
对混合形态超新星遗迹 G298.6-0.0 的新鉴定，可能与伽马射线有关
DOI：
10.1093/pasj/psv096
复制
发表时间：
2016
影响因子：
2.3
通讯作者：
Lorella
中科院分区：
文献类型：
--
作者：
Bamba;Aya; Sawada;Makoto; Nakano;Yuto; Terada;Yukikatsu; Hewitt;John; Petre;Robert; Angelini;Lorella
我们对银河系超新星遗迹（SNR）G298.6−0.0进行了X射线分析。X射线图像显示了射电壳层内部的中心填充结构，这意味着该SNR可以归类为混合形态（MM）SNR。用单温电离平衡等离子体模型很好地再现了该谱，温度为0.78（0.70-0.87）keV。等离子体的总质量为30 M，表明等离子体起源于星际介质。与GeV伽马射线源3FGL J1214.0−6236在SNR壳层上的关联进行了讨论，并与其他具有GeV伽马射线关联的MM SNR进行了比较。研究发现，随着MM SNR的物理尺寸变大，经吸收校正的热X射线和GeV γ射线之间的通量比减小。G298.6−0.0的吸收校正热X射线通量和3FGL J1214.0−6236的GeV伽马射线通量密切遵循这一趋势，这意味着3FGL J1214.0−6236可能是G298.6−0.0的GeV对应物。
We present an X-ray analysis on the Galactic supernova remnant (SNR) G298.6−0.0 observed with Suzaku. The X-ray image shows a center-filled structure inside a radio shell, implying that this SNR can be categorized as a mixed-morphology (MM) SNR. The spectrum is well reproduced by a single-temperature plasma model in ionization equilibrium, with a temperature of 0.78 (0.70–0.87) keV. The total plasma mass of 30M⊙indicates that the plasma has an interstellar medium origin. The association with a GeV gamma-ray source, 3FGL J1214.0−6236, on the shell of the SNR is discussed, in comparison with other MM SNRs with GeV gamma-ray associations. It is found that the flux ratio between absorption-corrected thermal X-rays and GeV gamma-rays decreases as the physical size of MM SNRs becomes larger. The absorption-corrected thermal X-ray flux of G298.6−0.0 and the GeV gamma-ray flux of 3FGL J1214.0−6236 closely follow this trend, implying that 3FGL J1214.0−6236 is likely to be a GeV counterpart of G298.6−0.0.