WANG Bao-tian, ZHANG Hai-yan. Research on the Proper Motion in CSO OQ208[J]. Astronomical Techniques and Instruments, 2007, 4(2): 121-125.
Citation: WANG Bao-tian, ZHANG Hai-yan. Research on the Proper Motion in CSO OQ208[J]. Astronomical Techniques and Instruments, 2007, 4(2): 121-125.

Research on the Proper Motion in CSO OQ208

  • The compact symmetric object (CSO)OQ208 was observed with Very Long Baseline Array (VLBA)at 5GHz and 8GHz bands.The obtained total intensity images show that OQ208 consists of a southwestern and a northeast structures.Both of them are resolved into two components at 5GHz, while one more component is detected in the northeast region at 8GHz band.Analyzing images at 5GHz band taken in 5 epochs from 1993 to 2001, an estimate of separation velocity 0.037±0.006mas/a(year) is derived as the relative motions of components A and D.Moreover, on the basis of the images in 9 epochs from 1994 to 2002, the proper motion 0.0 4 6±0.009mas/a of component C moving away from component A at 8GHz band is also found.
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