期刊
ASTRONOMY & ASTROPHYSICS
卷 400, 期 3, 页码 1007-1012出版社
E D P SCIENCES
DOI: 10.1051/0004-6361:20030090
关键词
black hole physics; radiation mechanisms : non-thermal; ISM : jets and outflows; radio continuum : stars; X-rays : stars; stars : individual : GX 339-4
We present the results of a long-term study of the black hole candidate GX 339-4 using simultaneous radio (from the Australia Telescope Compact Array) and X-ray (from the Rossi X-ray Timing Explorer and BeppoSAX) observations performed between 1997 and 2000. We find strong evidence for a correlation between these two emission regimes that extends over more than three decades in X-ray flux, down to the quiescence level of GX 339-4. This is the strongest evidence to date for such strong coupling between radio and X-ray emission. We discuss these results in light of a jet model that can explain the radio/X-ray correlation. This could indicate that a significant fraction of the X-ray flux that is observed in the low-hard state of black hole candidates may be due to optically thin synchrotron emission from the compact jet.
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