摘要
本文给出了17颗不同类型OH脉泽星的近红外观测结果(其中包括6个Mira-1665/1667MHz-OH脉泽星,4个Mira-1612 MHz-OH脉泽星,7个光学看不见的1612 MHz-OH脉泽星).得出了它们的J、H、K的星等和流量.同时经证认找出了它们对应的IRAS观测数据.通过对它们的远红外、近红外以及OH射电资料的同时分析,本文得到了不同类型OH脉泽星的红外光度L_1(1μ—100μ),远红外光度L_2(40μ—120μ),红外谱在25μ—2.28μ之间的斜率S_1,硅酸盐10μ特征S_(10)以及中失星的质量损失率(?).计算结果表明各类OH脉泽星的L_1,L_2,S_1和S_(10)均有随中央星质量损失率(?)的增大而不断增长的趋势.这说明红巨星在AGB演化分支上,从光学Mira到光学不可见的OH/IR星,从OH-1665/1667MHz脉泽到OH-1612MHz脉泽确实存在一个紧密衔接的演化序列.
J H K photometry of 17 different types OH maser stars is presented in this paper. 6 Mira-1665/1667 MHz-OH maser stars, 4 Mira-1612 MHz-OH maser stars and 7 optical unidentified 1612 MHz OH/IR stars are included in it. Their IRAS fluxes and 9.7μ dust features S_(10) are also found out. By using the simultaneous analysis for far-infrared, near-infrared and OH radio data, the total infrared luminosities L_1(1μ—100μ), far-infrared luminosities L_2(40μ —120μ), slopes S_1 between 25μ and 2.28μ and mass loss rates M of 17 OH/IR stars are derived. These results show: the L_1,L_2,S_1 and S_(10) always tend to increase with the increasing of M. It suggests that on the AGB there is a continuous evolution sequence from optical Miras to unidentified OH/IR stars and from OH-1665/1667MHz masers to OH-1612MHz masers.
出处
《天文学报》
CSCD
北大核心
1991年第1期17-27,共11页
Acta Astronomica Sinica
基金
国家自然科学基金
关键词
OH脉泽星
近红外
测光
AGB星
Infrared Photometry—OH/IR maser sources—AGB stars
