OH-1612MHz脉泽双峰频谱在AGB上的演化  

EVOLUTION OF THE DOUBLE PEAK SPECTRA FOR OH-1612 MHz MASER EMISSION ON THE AGB

作　　者：孙锦[1] 张国金[2] 房耕 

机构地区：[1]北京师范大学天文系 [2]北京大学地球物理系

出　　处：《天文学报》1990年第4期366-374,共9页Acta Astronomica Sinica

基　　金：国家自然科学基金

摘　　要：本文基于与OH-1612 MHz脉泽成协的AGB星的观测,研究了当AGB星的质量损失率随时间变化时,OH-1612 MHz脉泽双峰频谱的演化.用本文计算的结果验证OH发射范围与以及OH脉泽光度与的经验关系,证明这一结果与观测符合较好.按照本文模型导出的OHPN演化阶段的寿命大约为100—500年.Based on the observations of AGB stars associated with 1612 MHz OH masers, the evolution of the double peak spectra for 1612 MHz OH maser emission is studied from a model, in which the mass loss rates are varied with time on the AGB. The theoretical relations between OH shell radius Ro and mass loss rate (?) and between OH maser luminosity L_(OH) and M are also obtained. These relations are in agreement with empirical relations established from observations. The model also indicates that OH emission can last over 100—500 years after the termination of the AGB. This timescale can be regarded as the lifetime of OHPN phase.

关 键 词：AGB星 恒星 OH脉泽 谱线 形成 

分 类 号：P155.22[天文地球—天文学]