Photometry and spectroscopy of the interacting binary white dwarf V803 Cen (AE-1)

Open Access

1 July 1987

journal article
Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society

Vol. 227 (2) , 347-357
https://doi.org/10.1093/mnras/227.2.347

Abstract

High-speed photometry of the helium variable V803 Cen (AE-1) is presented which shows rapid oscillation at 1611 and 175 s. The 1611-s period has a complex and variable harmonic structure. Both periods remained coherent over four days when the system was at ~13.4 in B. After the system faded to B ~15.4, the coherency of the 1611-s period seemed to be breaking down and a significant period change in the 175-s oscillation was found. A spectrum of the system at B ~15.4 showed evidence for weak He I emission. These properties establish that V803 Cen is the same kind of object as PG 1346+082. The overall properties of the two stars are considered with those of AM CVn and GP Com and are found to be consistent with the interacting binary white dwarf model.

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