Non-Equilibrium Ionization State and Two-Temperature Structure in the Bullet Cluster 1E 0657−56

Non-Equilibrium Ionization State and Two-Temperature Structure in the Bullet Cluster 1E 0657−56
复制标题

子弹团 1E 0657−56 中的非平衡电离态和双温结构

DOI:
10.1093/pasj/64.1.12
复制
发表时间:
2011
影响因子:
2.3
通讯作者:
K. Yoshikawa
K. Yoshikawa
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
T. Akahori;K. Yoshikawa

文献摘要

参考文献

被引文献

相似文献

利用N体和流体动力学模拟研究了合并星系团1 E 0657� 56(子弹团)中团内介质的非平衡电离态和电子-离子双温结构.我们发现,与X射线亚峰(子弹)相关的冲击层处的电子温度根据电子和离子之间的热弛豫模型而有很大不同;在再现所观察到的X射线形态的模拟中,库仑热弛豫模型为25 keV,瞬时热弛豫模型为45 keV。此外,与激波层周围的电离平衡态相比,Fe XXV和Fe XXVI都过量,因此,Fe XXV和Fe XXVI之间的K线强度比与电离平衡态相比发生了显著变化。我们还进行了模拟与合并参数的不同设置,并讨论了在这个系统中的非平衡效应的可能范围。我们的结果可以用未来的X射线观测来检验,如Astro-H在高能波段具有更好的灵敏度。
We investigate a non-equilibrium ionization state and an electron–ion two-temperature structure of the intracluster medium in the merging galaxy cluster, 1E 0657� 56 (Bullet cluster), using a series of N -body and hydrodynamic simulations. We find that the electron temperature at the shock layer associated with the X-ray sub-peak (bullet) is quite different depending on the thermal relaxation model between electrons and ions; � 25 keV for the Coulomb thermal relaxation model and � 45 keV for the instantaneous thermal relaxation model in the simulations which reproduce the observed X-ray morphology. Furthermore, both of Fe XXV and Fe XXVI are overabundant compared with the ionization equilibrium state around the shock layer, and thus, the intensity ratio between Fe XXV and Fe XXVI K˛ lines are significantly altered from that in the ionization equilibrium state. We also carry out the simulations with various sets of merger parameters, and discuss a possible range of the non-equilibrium effects in this system. Our results could be tested with future X-ray observations such as Astro-H with better sensitivity in high energy band.
利用高分辨率 Sunyaev-Zeldovich 效应图像和 X 射线数据探索团簇物理
DOI: --
发表时间: 2004
期刊: Publication of the Astronomical Society of Japan 56・1
影响因子: --
作者:
Kitayama;T.et al.
通讯作者: T.et al.
DOI: 10.1093/pasj/62.2.371
发表时间: 2010-01
影响因子: 2.3
作者:
A. Hoshino;J. Henry;Kosuke Sato;Hiroki Akamatsu;Wataru Yokota;Shin Sasaki;Y. Ishisaki;T. Ohashi-T
通讯作者: A. Hoshino;J. Henry;Kosuke Sato;Hiroki Akamatsu;Wataru Yokota;Shin Sasaki;Y. Ishisaki;T. Ohashi-T
DOI: 10.1093/pasj/63.sp3.s1019
发表时间: 2011-06
影响因子: 2.3
作者:
H. Akamatsu;A. Hoshino;Y. Ishisaki;T. Ohashi;Kosuke Sato;Y. Takei;N. Ota
通讯作者: H. Akamatsu;A. Hoshino;Y. Ishisaki;T. Ohashi;Kosuke Sato;Y. Takei;N. Ota
关于合并星系团 1E 0657-56 中的 X 射线和质量分布:具有 NFW 密度剖面的子结构中的冲压压力剥离
DOI: --
发表时间: 2006
期刊: Publications of the Astonomical Society of Japan 58
影响因子: --
作者:
Ando;Shin'ichiro;;Komatsu;Eiichiro;;Narumoto;Takuro;Motokazu Takizawa
通讯作者: Motokazu Takizawa
DOI: 10.1093/pasj/58.4.641
发表时间: 2006-03
影响因子: 2.3
作者:
K. Yoshikawa;S. Sasaki
通讯作者: K. Yoshikawa;S. Sasaki