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A transient relativistic radio jet from Cygnus X-1

(2006)

Authors:

RP Fender, AM Stirling, RE Spencer, I Brown, GG Pooley, TWB Muxlow, JCA Miller-Jones
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Jets in neutron star X-ray binaries: a comparison with black holes

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 366:1 (2006) 79-91

Authors:

S Migliari, RP Fender
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Opening angles, Lorentz factors and confinement of X-ray binary jets

(2006)

Authors:

JCA Miller-Jones, RP Fender, E Nakar
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INTEGRAL/RossiXTE high-energy observation of a state transition of GX 339-4

(2006)

Authors:

T Belloni, I Parolin, M Del Santo, J Homan, P Casella, RP Fender, WHG Lewin, M Mendez, JM Miller, M van der Klis
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A link between radio loudness and X-ray/optical properties of AGN

International Conference Recent Advances in Natural Language Processing, RANLP (2006)

Authors:

S Jester, E Körding, R Fender

Abstract:

We have found empirically that the radio loudness of AGN can be understood as function of both the X-ray and optical luminosity. This way of considering the radio loudness was inspired by the hardness-intensity diagrams for X-ray binaries, in which objects follow a definite track with changes to their radio properties occurring in certain regions. We generalize the hardness-intensity diagram to a disk-fraction luminosity diagram, which can be used to classify the accretion states both of X-ray binaries and of AGN. Using a sample of nearly 5000 SDSS quasars with ROSAT matches, we show that an AGN is more likely to have a high radio: optical flux ratio when it has a high total luminosity or a large contribution from X-rays. Thus, it is necessary to take into account both the optical and the X-ray properties of quasars in order to understand their radio loudness. The success of categorizing quasars in the same way as X-ray binaries is further evidence for the unification of accretion onto stellar-mass and supermassive compact objects.