Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-08-06
Astrophys.J.597:1023-1035,2003
Astronomy and Astrophysics
Astrophysics
Corrected typo in the author names, contents unchanged, accepted in ApJ
Scientific paper
10.1086/378672
We investigate the association between the radio ``plateau'' states and the large superluminal flares in GRS 1915+105 and propose a qualitative scenario to explain this association. We identify several candidate superluminal flare events from available monitoring data on this source and analyze the contemporaneous RXTE pointed observations. We detect a strong correlation between the average X-ray flux during the ``plateau'' state and the total energy emitted in radio during the subsequent radio flare. We find that the sequence of events is similar for all large radio flares with a fast rise and exponential decay morphology. Based on these results, we propose a qualitative scenario in which the separating ejecta during the superluminal flares are observed due to the interaction of the matter blob ejected during the X-ray soft dips, with the steady jet already established during the ``plateau'' state. This picture can explain all types of radio emission observed from this source in terms of its X-ray emission characteristics.
Ishwara-Chandra C. H.
Naik Swatee
Pooley Guy G.
Pramesh Rao A.
Rao Ravi A.
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