标题： 星系团X射线辐射的辐射冷却效应 显示英文标题

标题： The effect of radiative cooling on X-ray emission from clusters of galaxies

摘要： 本文利用边长为100Mpc的宇宙学体积的最新N体流体动力学模拟，同时在标准冷暗物质（SCDM）宇宙学和带有正宇宙常数（LCDM）的宇宙学中生成许多星系团。我们针对相同体积进行了有无辐射冷却影响的模拟，但在所有情况下都忽略了恒星形成和反馈的影响。带有辐射冷却的星系团在X射线中的亮度平均比没有冷却的相同星系团低五倍。强调了中心星系质量在决定X射线亮度方面的重要性。 显示英文摘要

摘要： In this paper we use state-of-the-art N-body hydrodynamic simulations of a cosmological volume of side 100Mpc to produce many galaxy clusters simultaneously in both the standard cold dark matter (SCDM) cosmology and a cosmology with a positive cosmological constant (LCDM). We have performed simulations of the same volume both with and without the effects of radiative cooling, but in all cases neglect the effects of star formation and feedback. With radiative cooling clusters are on average five times less luminous in X-rays than the same cluster simulated without cooling. The importance of the mass of the central galaxy in determining the X-ray luminosity is stressed.