Dual-frequency VSOP Imaging of a High-redshift Radio Quasar PKS 1402+044
| dc.creator | Yang, Jun | |
| dc.creator | Gurvits, Leonid | |
| dc.creator | Lobanov, Andrei | |
| dc.creator | Frey, Sandor | |
| dc.creator | Hong, Xiao-Yu | |
| dc.date | 2006-11-14 | |
| dc.date.accessioned | 2026-07-07T07:30:48Z | |
| dc.date.available | 2026-07-07T07:30:48Z | |
| dc.description | Based on the VLBI Space Observatory Programme (VSOP) observations at 1.6 and 5 GHz, we find that the luminous high-redshift (z=3.215) quasar PKS 1402+044 (J1405+0415) has a pronounced 'core--jet' structure. The jet shows a steeper spectral index and lower brightness temperature with the increase of the distance from the core. The variation of brightness temperature is basically consistent with the shock-in-jet model. Assuming that the jet is collimated by the ambient magnetic field, we estimate the mass of the central object as ~10^9 M_sun. The upper limit of the jet proper motion of PKS 1402+044 is 0.03 mas/yr (~3c) in the east-west direction. | |
| dc.description | 3 pages, 2 figures, Proceedings of the 8th European VLBI Network Symposium, Torun, Poland, 26-29 Sep. 2006 | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0611425 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0611425 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/118530 | |
| dc.subject | Astrophysics | |
| dc.title | Dual-frequency VSOP Imaging of a High-redshift Radio Quasar PKS 1402+044 | |
| dc.type | text |