Excess sub-millimetre emission from GRS 1915+105

Abstract

We present the first detections of the black hole X-ray binary GRS 1915+105 at sub-millimetre wavelengths. We clearly detect the source at 350 GHz on two epochs, with significant variability over the 24 hr between epochs. Quasi-simultaneous radio monitoring indicates an approximately flat spectrum from 2 - 350 GHz, although there is marginal evidence for a minimum in the spectrum between 15 - 350 GHz. The flat spectrum and correlated variability imply that the sub-mm emission arises from the same synchrotron source as the radio emission. This source is likely to be a quasi-steady partially self-absorbed jet, in which case these sub-mm observations probe significantly closer to the base of the jet than do radio observations and may be used in future as a valuable diagnostic of the disc:jet connection in this source.

5 pages, 3 figures, accepted for publication in MNRAS

References in corpus (1)

• The very flat radio - millimetre spectrum of Cygnus X-1

Cited by in corpus (10)

• Production of Intermediate-Mass Black Holes in Globular Clusters
• Powerful jets from black hole X-ray binaries in Low/Hard X-ray states
• GRS 1915+105 and the Disc-Jet Coupling in Accreting Black Hole Systems
• The jet-powered optical nebula of Cygnus X-1
• Composition, collimation, contamination: the jet of Cygnus X-1
• Study of the Largest Multiwavelength Campaign of the Microquasar GRS 1915+105
• Matter ejections behind the highs and lows of the transitional millisecond pulsar PSR J1023+0038
• Sub-mm Jet Properties of the X-Ray Binary Swift J1745$-$26
• ALMA/NICER observations of GRS 1915+105 indicate a return to a hard state
• Models of the Compact Jet in GRS 1915+105