2002MNRAS.336...73Z

We present the results of a three-year photometric study of the δ Scuti star UV Trianguli. Our data sets consist of 9378 differential measurements in Johnson V together with a few data collected into the Strömgren uvbyβ system. UV Tri is at least a biperiodic variable. The two best-fitting frequencies, f₁= 9.3298 d ^–1 and f₂= 10.8513 d ^–1, are still not the complete set of pulsation frequencies representing the light variations of the star. A suspected third frequency might present in the star. Several `anomalous cycles' are observed in the light curves. They seem real, but are aperiodic. We derive the colour indices and physical parameters for the variable and conclude that it is a Population I δ Sct star with normal metal abundance ( [Me/H]= 0.0±0.1 dex) evolving on its main-sequence stage at an early evolutionary phase before the turn-off point. Finally, we compare the observed oscillation frequencies with theoretical models. The two pulsation modes of UV Tri are likely to be non-radial gravity modes.