不同类型OH脉泽星的近红外测光与研究  

NEAR INFRARED PHOTOMETRY AND ANALYSIS OF DIFFERENT TYPES OH MASER STARS

作　　者：孙锦[1] 房耕 魏晗 

机构地区：[1]北京师范大学天文系 [2]上海自然博物馆

出　　处：《天文学报》1991年第1期17-27,共11页Acta Astronomica Sinica

基　　金：国家自然科学基金

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.

关 键 词：OH脉泽星 近红外 测光 AGB星 

分 类 号：P145.4[天文地球—天体物理]