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Accretion and pulsation of IU Per based on INTEGRAL and ground base photometry

Published online by Cambridge University Press:  21 February 2013

Emil Kundra ,
Ladislav Hric  and
Rudolf Gális
Emil Kundra
Affiliation:
Astronomical Institute of the Slovak Academy of Sciences, 059 60 Tatranská Lomnica, Slovakia email: [email protected]
Ladislav Hric
Affiliation:
Astronomical Institute of the Slovak Academy of Sciences, 059 60 Tatranská Lomnica, Slovakia email: [email protected]
Rudolf Gális
Affiliation:
Department of Theoretical Physics and Astrophysics, Institute of Physics, Faculty of Sciences, P. J. Šafárik University, Park Angelinum 9, 040 01 Košice, Slovakia
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Abstract

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IU Persei (IU Per) is an eclipsing semi detached (SD) binary with pulsating component (oscillating eclipsing Algol - oEA). Using our ground base photometry in Johnson's B and V filters and INTEGRAL/OMC (Optical Monitoring Camera) data in V filter we introduce the model of this system. We determined the (O - C) diagram behavior. Moreover, the short term variations of the light curve were detected. Whats more, we obtained residua, by comparison of observational and synthetic light curves (LC), of which the detailed period analysis enabled to characterize and localize their source, that can be explained as the pulsation activity of the primary component. The secondary, less massive component, is beyond the instability belt on H-R diagram and fulfills its Roche lobe. The accreting primary component pulsates in modes typical for the δ Scuti stars.

Keywords

binaries: eclipsing stars: oscillationsaccretiontechniques: photometric
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S290: Feeding Compact Objects: Accretion on All Scales , August 2012 , pp. 377 - 378
Copyright
Copyright © International Astronomical Union 2013

References

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