标题： 演化恒星种群的紫外辐射 -- I. 模型 显示英文标题

标题： Ultraviolet Radiation from Evolved Stellar Populations -- I. Models

摘要： 这一系列论文系统地探讨了这样一个假设：星团和椭圆星系的远紫外辐射起源于极端高温的水平分支（HB）恒星及其后HB演化产物。 第一篇论文介绍了从零年龄水平分支到后期后HB演化阶段或白矮星冷却轨迹上某一点的恒星模型的广泛网格计算。 我们使用“极端水平分支”（EHB）一词来指代不达到红巨星分支热脉动阶段的恒定质量的水平分支序列。 这些模型在核心氦耗尽后演化。 显示英文摘要

摘要： This series of papers comprises a systematic exploration of the hypothesis that the far ultraviolet radiation from star clusters and elliptical galaxies originates from extremely hot horizontal-branch (HB) stars and their post-HB progeny. This first paper presents an extensive grid of calculations of stellar models from the Zero Age Horizontal Branch through to a point late in post-HB evolution or a point on the white dwarf cooling track. We use the term `Extreme Horizontal Branch' (EHB) to refer to HB sequences of constant mass that do not reach the thermally-pulsing stage on the AGB. These models evolve after core helium exhaustion