Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-12-14
Astrophys.J. 619 (2005) L139-L142
Astronomy and Astrophysics
Astrophysics
13 pages, 2 figures, ApJL in press. Movies are available at http://th.nao.ac.jp/tsunami/index.htm
Scientific paper
10.1086/428042
This is the first attempt to construct detailed X-ray spectra of clusters of galaxies from the results of high-resolution hydrodynamic simulations and simulate X-ray observations in order to study velocity fields of the intracluster medium (ICM). The hydrodynamic simulations are based on the recently proposed tsunami model, in which cluster cores are affected by bulk motions of the ICM and turbulence is produced. We note that most other solutions of the cooling flow problem also involve the generation of turbulence in cluster cores. From the mock X-ray observations with Astro-E2 XRS, we find that turbulent motion of the ICM in cluster cores could be detected with the satellite. The Doppler shifts of the metal lines could be used to discriminate among turbulence models. The gas velocities measured through the mock observations are consistent with the line-emission weighted values inferred directly from hydrodynamic simulations.
Fujita Yutaka
Furusho Tae
Matsumoto Tomoaki
Wada Keiichi
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