The radio-quiet nature of Swift J1753-0127
Abstract
A lot of effort has gone into trying to explain the two radio/X-ray correlation tracks seen in the low/hard state of black hole binaries in recent years. The standard correlation of the form L_{R}∝ L^{0.7±0.1}_{X} is clearly paired with a lower, radio-quiet track with a slope of ∼1-1.4, although a generally accepted cause for this remains unclear. We present new simultaneous radio/X-ray observations of Swift J1753-0127, spanning over a year in time, which seem to confirm the steep-slope radio-quiet nature of the source. Our X-ray-faint sample complements previous higher luminosity observations, making Swift J1753 one of the best sampled sources in L_{X}-L_{R}. We find that the source has only very recently started showing possible signs of a dual track behaviour, moving from the radio-quiet track towards the standard correlation track with decreasing X-ray flux. If the source continues its current trend all the way down to X-ray quiescence, this will provide us with a unique opportunity to study the transition from a 'radio-quiet state' back to the standard correlation.
- Publication:
-
The X-ray Universe 2014
- Pub Date:
- July 2014
- Bibcode:
- 2014xru..confE.101K