Multicolor photometry of the galaxy cluster A98: substructures and star formation properties

An optical photometric observation with the Beijing–Arizona–Taiwan–Connecticut (BATC) multicolor system is carried out for A98 (z = 0.104),a galaxy cluster with two large enhancements in X-ray surface brightness.Spectral energy distributions (SEDs) covering 15 intermediate bands are obtained for all sources detected down to V ～ 20 mag in a field of 58 × 58 .After star–galaxy separation with colorcolor diagrams,a photometric redshift technique is applied to the galaxy sample for further membership determinat...     

恒星演化晚期阶段研究中的流体动力学计算方法

综述了数值模拟恒星演化晚期阶段所使用的流体动力学计算方法和程序等方面的情况以及研究现状。