Parsec-scale Jet in the Distant Gigahertz-Peaked Spectrum Quasar PKS 0858-279
| dc.creator | Kovalev, Y. Y. | |
| dc.date | 2009-01-09 | |
| dc.date.accessioned | 2026-07-07T12:54:41Z | |
| dc.date.available | 2026-07-07T12:54:41Z | |
| dc.description | The high redshift GPS quasar PKS 0858-279 exhibits the following properties which make the source unusual. Our RATAN-600 monitoring of 1-22 GHz spectrum has detected broad-band radio variability with high amplitude and relatively short time scale. In the same time, the milliarcsecond scale structure observed in a snapshot VLBA survey turned out to be very resolved which is not expected from the fast flux density variations. We performed 1.4-22 GHz VLBA observations of this quasar in 2005-2007. It has revealed a core-jet morphology. A high Doppler factor delta is suggested for the jet, its nature is discussed in this report on the basis of the multi-frequency VLBA and RATAN data collected. Synchrotron self-absorption was confirmed to be dominating at low frequencies, the magnetic field strength of the dominating jet feature is estimated of an order of 0.1*delta mG. | |
| dc.description | 4 pages, 4 figures; accepted for publication in the Astronomische Nachrichten | |
| dc.identifier | https://arxiv.org/abs/0901.1187 | |
| dc.identifier | http://arxiv.org/abs/0901.1187 | |
| dc.identifier | Astronomische Nachrichten, 330 (2009) 141-144 | |
| dc.identifier | doi:10.1002/asna.200811141 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/224022 | |
| dc.subject | Astrophysics of Galaxies | |
| dc.title | Parsec-scale Jet in the Distant Gigahertz-Peaked Spectrum Quasar PKS 0858-279 | |
| dc.type | text |