The semi-detached binary system IU Per and its intrinsic oscillation

Details The semi-detached binary system IU Per and its intrinsic oscillation The semi-detached binary system IU Per and its intrinsic oscillation

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009raa.....9..422z&link_type=abstract

Research in Astronomy and Astrophysics, Volume 9, Issue 4, pp. 422-430 (2009).

Astronomy and Astrophysics

Astrophysics

3

Scientific paper

We present a long-term time-resolved photometry of the short-period eclipsing binary IU Per. It confirms the intrinsic δ Scuti-like pulsation of the system reported by Kim et al. With the obtained data, an orbital period study and an eclipsing light curve synthesis based on the Wilson-Devinney method were carried out. The photometric solution reveals a semi-detached configuration with the less-massive component filling its own Roche-lobe. By subtracting the eclipsing light changes from the data, we obtained the pure pulsating light curve of the mass-accreting primary component. A Fourier analysis reveals four pulsation modes with confidence larger than 99%. A mode identification based on the results of the photometric solution was made. It suggests that the star may be in radial pulsation with a fundamental period of about 0.0628 d. A brief discussion concerning the evolutionary status and the pulsation nature is finally given.

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