| Autor: |
HOOIMEYER, JRA, SCHILIZZI, RT, MILEY, GK, BARTHEL, PD |
| Přispěvatelé: |
Kapteyn Astronomical Institute |
| Jazyk: |
angličtina |
| Rok vydání: |
1992 |
| Předmět: |
|
| Zdroj: |
Astronomy & astrophysics, 261(1), 5-8. EDP Sciences |
| ISSN: |
0004-6361 |
| Popis: |
Multi-epoch VLBI observations are presented of two large double-lobed quasars, 4C 28.45 (1830 + 285) and 4C 21.35 (1222 + 216). On mas-scales, both quasars contain a multi-component asymmetric radio structure. In 4C 28.45 the nuclear emission was seen to expand, the observed proper motions corresponding to an apparent expansion velocity of (3.0 +/- 0.8)c. In the case of 4C 21.35, the evidence for superluminal motion is less strong; the data are compatible with an apparent expansion velocity of (1.6 +/- 0.6)c. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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