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Detection of Proper Motion in OQ208? |
| LIU Xiang1;C. Stanghellini2;D. Dallacasa3;M. Bondi4 |
| 1Urumqi Astronomical Observatory, National Astronomical Observatories, Chinese Academy of Sciences, Urumqi 830011
2Istituto di Radioastronomia del CNR, Noto, Italy
3Università di Bologna, Italy
4Istituto di Radioastronomia del CNR, Bologna, Italy
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| Cite this article: |
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LIU Xiang, C. Stanghellini, D. Dallacasa et al 2000 Chin. Phys. Lett. 17 307-309 |
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Abstract We report on an ongoing work aimed to detect the separation speed of the two hot-spots of the compact symmetric object OQ208. Comparing images at 8.4 GHz taken in 6 epoches between 1994 and 1997 we obtain an estimate of 0.058±0.038 mas/year as the relative motions between two components of the radio source. At the red-shift of OQ208 1 mas correspond to 1 pc, thus we obtain a projected jet speed of 0.095±0.062c. With an inclination of 45o between the jets and the line of sight, we have an actual jet velocity of 0.134±0.088c and therefore the kinematic age of the source is so young of 320±210 years.
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| Keywords:
98.54.Cm
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Published: 01 April 2000
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| PACS: |
98.54.Cm
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(Active and peculiar galaxies and related systems (including BL Lacertae objects, blazars, Seyfert galaxies, Markarian galaxies, and active galactic nuclei))
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