Astron. Astrophys. 344, 199-204 (1999)

Optically thick super-Eddington winds in Galactic superluminal sources

A.A. Belyanin

Institute of Applied Physics, Russian Academy of Science 46 Ulyanov st., 603600 Nizhny Novgorod, Russia (belyanin@appl.sci-nnov.ru)

Received 28 September 1998 / Accepted 7 January 1999

Abstract

A model of major ejection events in Galactic superluminal sources GRO J 1655-40 and GRS 1915-105 is proposed, in which episodes of pair creation give rise to the formation of optically thick outflows accelerating protons to the limiting Lorentz factor of order 2-3. Probable source of pairs is pion production in nucleon collisions. Subsequent deceleration of ejecta and formation of radio jets is analyzed in detail within a shock deceleration model. The detailed data available for GRO J 1655-40 are shown to be in good agreement with proposed scenario.

Key words: acceleration of particles accretion, accretion disks radiation mechanisms: non-thermal stars: individual: GRO J 1655-40 stars: individual: GRS 1915+105

Send offprint requests to: A. Belyanin

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Contents

• 1. Introduction
• 2. Formation of relativistic outflows
  • 2.1. Pair production
  • 2.2. Gamma-ray signatures
• 3. Deceleration of ejecta and formation of radio jets
• 4. Application to GRO J 1655-40
• 5. Conclusions
• Acknowledgements
• References

© European Southern Observatory (ESO) 1999

Online publication: March 10, 1999
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