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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, Cambridge USA
R. I. Hynes
Affiliation:
The University of Texas at Austin, Austin USA
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 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

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

Information

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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