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.
出处
《天文学报》
CSCD
北大核心
1990年第4期366-374,共9页
Acta Astronomica Sinica
基金
国家自然科学基金
关键词
AGB星
恒星
OH脉泽
谱线
形成
AGB stars—OH masers—Formation of spectrum lines
