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Non-radial pulsations in the Be/X binaries 4U 0115+63 and SAX J2103.5+4545

Published online by Cambridge University Press:  12 July 2011

Juan Gutiérrez-Soto ,
Pablo Reig ,
Juan Fabregat  and
Lester Fox-Machado
Juan Gutiérrez-Soto
Affiliation:
Instituto de Astrofísica de Andalucía (CSIC), Glorieta de la Astronomía s/n 18008, Granada, Spain, email: jgs@iaa.es GEPI, Observatoire de Paris, CNRS, Université Paris Diderot, 5 place Jules Janssen, 92190 Meudon, France
Pablo Reig
Affiliation:
IESL, Foundation for Research and Technology, 71110 Heraklion, Crete, Greece University of Crete, Physics Department, PO Box 2208, 710 03 Heraklion, Crete, Greece
Juan Fabregat
Affiliation:
Observatorio Astronómico de la Universidad de Valencia, Calle Catedrático Agustín Escardino 7, 46980 Paterna, Valencia, Spain
Lester Fox-Machado
Affiliation:
Observatorio Astronómico Nacional, Instituto de Astronomía Universidad Nacional Autónoma de México, Ap. P. 877, Ensenada, BC 22860, Mexico
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Abstract

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The discovery of non-radial pulsations (NRP) in the Be/X binaries of the Magellanic Clouds (MC, eg. Fabrycky 2005, Coe et al. 2005, Schmidtke & Cowley 2005) provided a new approach to understand these complex systems, and, at the same time, favoured the synergy between two different fields: stellar pulsations and X-ray binaries. This breakthrough was possible thanks to the MACHO and OGLE surveys. However, in our Galaxy, only two Be/X have been reported to show NRP: GRO J2058+42 (Kiziloglu et al. 2007) and LSI+61 235 (Sarty et al. 2009). Our objective is to study the short-term variability of Galactic Be/X binaries, compare them to the Be/X of the MC and to the isolated Galactic Be observed with corot and kepler. We present preliminary results of two Be/X stars, namely 4U 0115+63 and SAX J2103.5+4545 showing multiperiodicity and periodicity respectively, most probable produced by NRP.

Keywords

stars: oscillations (including pulsations)stars: emission-lineBeX-rays: binariesstars: individual (4U 0115+63, SAX J2103.5+4545)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S272: Active OB stars: structure, evolution, mass loss, and critical limits , July 2010 , pp. 505 - 506
Copyright
Copyright © International Astronomical Union 2011

References

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