期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 485, 期 3, 页码 3696-3714出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stz604
关键词
accretion, accretion discs; black hole physics; relativistic processes; galaxies: jets; X-rays: binaries
资金
- NSF [0407063, 070707]
- NOVA (Dutch Research School for Astronomy)
- NASA (National Aeronautics and Space Administration) [80NSSC177K0515]
- Netherlands Organisation for Scientific Research (NWO) [614.001.209]
- NWO VICI grant [639.043.513]
- Margarete von Wrangell fellowship by the ESF
- Ministry of Science, Research and the Arts Baden-Wurttemberg
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [0407063] Funding Source: National Science Foundation
GX 339-4 is a black hole X-ray binary that is a key focus of accretion studies, since it goes into outburst roughly every 2-3 yr. Tracking of its radio, infrared (IR), and X-ray flux during multiple outbursts reveals tight broad-band correlations. The radio emission originates in a compact, self-absorbed jet; however, the origin of the X-ray emission is still debated: jet base or corona? We fit 20 quasi-simultaneous radio, IR, optical, and X-ray observations of GX 339-4 covering three separate outbursts in 2005, 2007, 2010-2011, with a composite corona+jet model, where inverse Compton emission from both regions contributes to the X-ray emission. Using a recently proposed identifier of the X-ray variability properties known as power-spectral hue, we attempt to explain both the spectral and evolving timing characteristics, with the model. We find the X-ray spectra are best fit by inverse Compton scattering in a dominant hot corona (kT(e) similar to hundreds of keV). However, radio and IR-optical constraints imply a non-negligible contribution from inverse Compton scattering off hotter electrons (kT(e) >= 511 keV) in the base of the jets, ranging from a few up to similar to 50 per cent of the integrated 3-100 keV flux. We also find that the physical properties of the jet show interesting correlations with the shape of the broad-band X-ray variability of the source, posing intriguing suggestions for the connection between the jet and corona.
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