河外水脉泽寄主星系的射电谱指数(英文)  

Radio spectral index of extragalactic H_2O maser host galaxies

作　　者：张江水[1] 黄峰[1] 郭仟[1] 

机构地区：[1]广州大学天体物理中心,广东广州510006

出　　处：《广州大学学报（自然科学版）》2009年第3期20-26,共7页Journal of Guangzhou University:Natural Science Edition

基　　金：Supported by National Natural Science Foundation of China(10633010);Natural Science Foundation of Guangdong Province, China(8451009101001047)

摘　　要：详细调研并收集了所有河外水脉泽寄主星系的射电观测资料(84个源).在6cm和20cm两个波段,"千脉泽"(其光度小于10个太阳光度)源的射电流量都大于"兆脉泽"源(其光度大于10个太阳光度).由收集的这两个波段的观测数据,首次导出了水脉泽星系的射电谱指数,α=0.87±0.11.比较水脉泽星系和没有检测到水脉泽的星系的谱指数,没有发现明显的差异.进一步分析水脉泽各向同性辐射光度与脉泽寄主星系射电强度,发现它们之间存在一个强相关,这与水脉泽辐射可能是对背景射电连续谱的放大的理论结果相吻合.The whole extragalactic H2O maser sample (84 sources) is compiled and the radio observation data of their host galaxies are investigated in detail and collected here. Our kilo-maser (LH2O<10L⊙) subsample shows higher radio flux at both 6 cm and 20 cm than mega-maser sources (LH2O<10L⊙). From both radio data,the radio spectral index of 6 cm and 20 cm is derived firstly for those sources with available observation data,α=0.87±0.11. No significant difference of the spectral index can be found between our...

关 键 词：河外 脉泽 谱指数 

分 类 号：P157.2[天文地球—天文学]