| Autor: |
Stirling, A.M., Spencer, R.E., de la Force, C.J., Garrett, M.A., Fender, R.P., Ogley, R.N. |
| Předmět: |
|
| Zdroj: |
Monthly Notices of the Royal Astronomical Society; 11/11/2001, Vol. 327 Issue 4, p1273-1278, 6p, 2 Charts, 5 Graphs |
| Abstrakt: |
We present the detection of a radio-emitting jet from the black hole candidate and X-ray binary source Cygnus X-1. Evidence of a bright core with a slightly extended structure was found on milliarcsecond resolution observations with the Very Long Baseline Array (VLBA) at 15.4 GHz. Later observations with the VLBA [and including the phased-up, Very Large Array (VLA)] at 8.4 GHz show an extended jet-like feature extending to ∼ 15 mas from a core region, with an opening angle of < 2°. In addition, lower resolution MERLIN observations at 5 GHz show that the source has < 10 per cent linear polarization. The source was in the low/hard X-ray state during the observations, and the results confirm the existence of persistent radio emission from an unresolved core and a variable, relativistic (> 0.6c) jet during this state. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Plný text