Document Type
Article
Publication Date
1-21-2005
Abstract
Observations of V404 Cyg performed using the Westerbork Synthesis Radio Telescope at four frequencies, over the interval 1.4-8.4 GHz, have provided us with the first broad-band radio spectrum of a 'quiescent' stellar mass black hole. The measured mean flux density is of 0.35 mJy, with a spectral index α = +0.09 ±0.19 (such that Sv oc vα). Synchrotron emission from an inhomogeneous partially self-absorbed outflow of plasma accounts for the flat/inverted radio spectrum, in analogy with hard-state black hole X-ray binaries, indicating that a steady jet is being produced between a few 10-6 and a few per cent of the Eddington X-ray luminosity.
Publication Source (Journal or Book title)
Monthly Notices of the Royal Astronomical Society
First Page
1017
Last Page
1021
Recommended Citation
Gallo, E., Fender, R., & Hynes, R. (2005). The radio spectrum of a quiescent stellar mass black hole. Monthly Notices of the Royal Astronomical Society, 356 (3), 1017-1021. https://doi.org/10.1111/j.1365-2966.2004.08503.x