摘要
搜集了一个含20个BLLac天体的样本,计算了样本的射电、X射线及γ射线之间的宽带谱指数(αRX,αRG,αXG),并讨论了这些谱指数之间的相互关系.
The radio,X-ray and γ-ray emissions are compiled for a simple of 20 BL Lacertae objects（BL Lacs） to calculate the effective spectrum indices,namely the radio-X-ray spectrum index,αRX,the radio-γ-ray spectrum index,αRG and the X-ray to γ-ray spectrum index,αXG.Also the relations among αRX,αRG and αXG are investigated.The average value of broadband spectral index for 20 BL Lacs 〈αRX〉 = 0.721 ±0.027,〈αXG 〉 = 0.946 ± 0.032, 〈αRG 〉 = 0.820 ±0.008. There is a strong correlation between αRX and αXG , with a correlation coefficient of r = -0.85 and a chance probability of P 〈 10 ^-4. There is a weak correlation between αRX and αRG , while there is no correlation between αXG and αRG . The results show that the γ-ray emissions are associated with both radio and X-ray emissions in BL Lacs. The γ-ray emissions are likely from the SSC process.
出处
《江西师范大学学报（自然科学版）》
CAS
北大核心
2009年第6期673-677,共5页
Journal of Jiangxi Normal University(Natural Science Edition)
基金
Supported by the National Natural Science Foundation of China(10633010)
the Fund of the 11~(th) Five-year plan for Rey construction Academic Subject(optics)of Hunan Province and the Hunan Provincial Natural Science Foundation of China(06JJ5002)
关键词
活动星系核
蝎虎天体
有效谱指数
active galactic nuclei
BL lacertae objects
effective spectrum indices
