Abstract
New CCD photometric monitoring on the high-amplitude δ Scuti variable BP Peg was carried out on November 4, 2013 by using the 1.0-m reflecting telescope of Yunnan Observatories in China as well as on December 29, 2013 by using the 85-cm telescope at Xinglong Station of National Astronomical Observatory in China. BP Peg is a new high-amplitude δ Scuti variable with a period of 0.10954357day. We have collected all the times of light maximum from the literature together with our data, and the pulsation period changes are analyzed through Observed–Calculated (O–C) method. With the available data, we discover that the pulsating period of BP Peg shows a cyclic oscillation with a period of 24.5years and an amplitude of 0.0060days. If the cyclic period changes are caused by light-time effect in a binary system, the reckoned mass of the hidden companion could be 0.20M⊙ and possibly, it is an M-type star.
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