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Bowen Fluorescence from Companion Stars in X-Ray Binaries

Published online by Cambridge University Press:  22 February 2018

J. Casares ,
D. Steeghs ,
R. I. Hynes ,
P. A. Charles ,
R. Cornelisse  and
K. O'Brien
J. Casares
Affiliation:
Instituto de Astrofísica de Canarias, La Laguna, Spain
D. Steeghs
Affiliation:
Harvard-Smithsonian Center for Astrophysics, CambridgeUSA
R. I. Hynes
Affiliation:
The University of Texas at Austin, AustinUSA
P. A. Charles
Affiliation:
University of Southampton, Southampton, UK
R. Cornelisse
Affiliation:
University of Southampton, Southampton, UK
K. O'Brien
Affiliation:
European Soutern Observatory, Santiago, Chile

Abstract

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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 K2 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

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.

Keywords

AccretionAccretion Discs — X-RaysBinaries — X-RaysStars
Type
The Contributed Papers
Information
International Astronomical Union Colloquium , Volume 194: Compact binaries in the galaxy and beyond , 2004 , pp. 21 - 22
Copyright
Copyright © Instituto de astronomia/revista mexicana de astronomίa y astrofίsica 2004

References

Casares, J. et al. 2003. ApJ. 590. 1041 CrossRefGoogle Scholar
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