Disk-Jet Connection in the Microquasar GRS 1915+105 and IR and Radio Emission

Abstract

We present evidence of a direct accretion disk-jet connection in the Galactic microquasar GRS 1915+105 based on our analysis of RXTE/PCA data with a ``spike'' in X-ray light curves. We find that the radio emission increases as the hardness ratio increases during the low hard state. We suggest that the ``spike'' which separates the dips with hard and soft spectra marks the beginning of the burst phase when the luminosity of the soft X-rays (5-15 keV) increases by a large factor (~ 10). This produces a major ejection episode of the synchrotron - emitting plasma termed as ``baby jets'' which are associated with infrared (IR) and radio flares of about half an hour period widely reported in the literature. Subsequent short but frequent soft dips produce overlapping faint flares which result in an enhanced level of quasi-steady emission. We discuss the dissipation of accretion energy in the inner part of the disk in terms of a comptonising cloud and the escaping mass which produces synchrotron radiation. We discuss the differences between ``baby jets'' and relativistic radio jets and especially investigate their signatures in X-rays. Our results support the relativistic jet model with quasi-continuous mass ejection and strong variations in the jet speeds required for the formation of strong internal shocks to continuously accelerate the particles.

7 pages + 5 figures, Accepted for publication in ApJ (Part 1), emulateapj style file

References in corpus (4)

• AU-Scale Synchrotron Jets and Superluminal Ejecta in GRS 1915+105
• Faint Infrared Flares from the Microquasar GRS 1915+105
• Rapid State Transitions in the Galactic Black Hole Candidate Source GRS 1915+105
• Detection of a Series of X-ray Dips Associated with a Radio Flare in GRS 1915+105

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• High-Energy Aspects of Astrophysical Jets
• Observational evidence for mass ejection during soft X-ray dips in GRS1915+105
• Study of the Largest Multiwavelength Campaign of the Microquasar GRS 1915+105
• Connection between accretion disk and superluminal radio jets and the role of radio plateau state in GRS 1915+105
• Observations of Rapid Disk-Jet Interaction in the Microquasar GRS 1915+105
• Properties of unique hard X-ray dips observed from GRS 1915+105 and IGR J17091-3624 and their implications
• Evidence for Synchrotron Bubbles from GRS 1915+105
• Spectral Analysis of $\chi$ Class Data of GRS 1915+105 Using TCAF Solution
• Discovery of a new flaring class in GRS 1915+105 using AstroSat
• Multi-wavelength observation of MAXI J1348$-$630 during the outburst in 2019
• X-Ray Bursts from the Galactic X-Ray Transient Source GRS 1915+105