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Bowen Fluorescence from Companion Stars in X-Ray Binaries

  • J. Casares (a1), D. Steeghs (a2), R. I. Hynes (a3), P. A. Charles (a4), R. Cornelisse (a4) and K. O'Brien (a5)...

Abstract

This paper will review a new technique of detecting companion stars in LMXBs and X-ray transients in outburst using the Bowen fluorescence NIII lines at 4634-4640. These lines are very efficiently reprocessed in the atmospheres of the companion stars and, thereby, provide estimates of the K 2 velocities and mass functions. The method has been applied to Sco X-1, X1822-371 and GX339-4 which, in the latter case, provides dynamical evidence for the presence of an accreting black hole. Preliminary results from a VLT campaign on V801 Ara, V926 Sco and XTE J1814-338 are also presented.

Resumen

Este artículo examina una nueva técnica para detectar estrellas compañeras en los LMXB y las transitorias de rayos X durante la transferencia de masa utilizando las líneas NIII fluorescentes de Bowen en 4634-4640. Estas líneas se reprocesan muy eficientemente en las atmósferas de las estrellas compañeras proporcionando estimaciones de las velocidades K2 y funciones de masas. Este método se aplicó a Sco X-l, X 822-371 y GB339-4 el cual, en este último caso, proporciona una evidencia dinámica de la presencia de un agujero negro acreciente. También se presentan resultados preliminares de una campaña VLT sobre V801 Ara, V926 Sco y XTE J1814-338.

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Copyright

References

Hide All
Casares, J. et al. 2003. ApJ. 590. 1041
Hynes, R.I. et al. 2003, ApJ. 583. L95
Steeghs, D. & Casares, J. 2002. ApJ. 568. 273
Wade, R.A.. & Horne, K. 1988. ApJ. 324, 411

Keywords

Bowen Fluorescence from Companion Stars in X-Ray Binaries

  • J. Casares (a1), D. Steeghs (a2), R. I. Hynes (a3), P. A. Charles (a4), R. Cornelisse (a4) and K. O'Brien (a5)...

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