| Annual Modulation in Intraday Variability Timescales of Extragalactic Radio Sources |
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| 引用本文： | Shan－JieQian,Xi－ZhenZhang. Annual Modulation in Intraday Variability Timescales of Extragalactic Radio Sources[J]. 中国天文和天体物理学报, 2001, 1(2): 133-143 |
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| 作者姓名： | Shan－JieQian Xi－ZhenZhang |
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| 摘 要： |
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| 关 键 词： | 河外星系 动力学 BLLac天体 射电星系 |
Annual Modulation in Intraday Variability Timescales of Extragalactic Radio Sources |
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| Affiliation: | BeijingAstronomicalObservatory,NationalAstronomicalObservatories,ChineseAcademyofSciences,Beijing1000 |
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| Abstract: | Annual modulations in timescales of intraday variability (IDY here-after) are discussed for six extragalactic sources:0716 714,0917 624,0954 65,1749 70,1803 78 and 2007 77.The timescales calculated from scintillation the-ory are compared with the observational data.It is emphasized that systematic observations are required to identify the phenomenon and to determine the motion of the interstellar medium with respect to the Local Standard of Rest.In addi-tion,significant deviations from the annual modulation could be due to intrinsic variations. |
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| Keywords: | scattering - ISM: kinematics - BL Lacertae objects: individual: 0716 71 - quasars: individual: 0917 62 - radiation mechanisms: non-thermal |
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