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Dual-frequency VSOP Imaging of a High-redshift Radio Quasar PKS 1402+044 | | Jun Yang
; Leonid Gurvits
; Andrei Lobanov
; Sandor Frey
; Xiao-Yu Hong
; | | Date: |
14 Nov 2006 | | Abstract: | 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. | | Source: | arXiv, astro-ph/0611425 | | Services: | Forum | Review | PDF | Favorites | |
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