Annual Modulation in Intraday Variability Timescales of Extragalactic Radio Sources
Annual Modulation in Intraday Variability Timescales of Extragalactic Radio Sources
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DOI：
10.1088/1009-9271/1/2/133
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发表时间：
2001-04
期刊：
影响因子：
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通讯作者：
S. Qian;Xi-zhen Zhang
中科院分区：
文献类型：
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作者：
S. Qian;Xi-zhen Zhang
讨论了6个河外源：0716+714、0917+624、0954+65、1749+70、1803+78和2007+77的日内变率(IDV)时间尺度上的年调制。根据闪烁理论计算的时间尺度与观测数据进行了比较。强调需要进行系统的观测，以确定这一现象，并确定星际介质相对于当地静止标准的运动。此外，与年调制的显著偏差可能是由于内在变化。
Annual modulations in timescales of intraday variability (IDV 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.