OH超脉泽源的模型与统计分析

A Model for OH Megamaser Sources and Some Statistical Analysis

本文提出OH超脉泽源的一个具体模型,在该模型中OH超脉泽源由非饱和的球型子源组成.在此估算出超脉泽星系致密射电核的尺度和连续谱亮温度,以及OH源距星系核的最小非饱和距离.计算表明,OH超脉泽源所包含的子源数目可能相当大.R_H～log ρ_(25μm)/ρ_(60μm)图、log L_(OH)/L_(IR)～log ρ_(25μm)/ρ_(60μm)图和其它结果显示,有一部分OH超脉泽源很可能是弱饱和的,本文对此作了解释.

We presented a model for OH megamaser in detail, in which the megamaser sources are composed of unsaturated spherical components. For ten OH megamaser galaxies, we estimate the sizes and continuum brightness temperatures of compact radio cores, as well as the minimum unsaturated distances of OH sources from nucli. Our results show the number of OH megamaser components in a single source may be very large. The diagrams of RH - logf25μm/ f60μm and log LOH/LIR- logf25μm/f60μm together with other evidences, imply that some OH megamaser sources are weakly saturated rather than being totally unsaturated as known before.