Beat phenomena in the dwarf cepheid AE UMa.
Abstract
AE UMa is an ultrashort pulsating variable. 1900 photoelectric B and V observations were carried out at the Merate Observatory during 1974. They enable us to determine nineteen new epochs of maximum and nineteen epochs of minimum light and to indicate a strong modulation in the light curves. The main period has been improved: P = 0d086016883 The residuals computed by means of P and the variation in the brightness of the maxima and of the minima can be accounted for by a beat phenomenon whose period is found to be: Pb=0d.293616. The secondary period follows: P1 =0d066527 and the ratio P1/P =0.7734. This ratio and the amplitudes of the oscillations relating to P and to P1 are compared with those of other double mode Al Vel variables. Key words: dwarf cepheids - Al Vel stars - beat phenomena
- Publication:
-
Astronomy and Astrophysics Supplement Series
- Pub Date:
- November 1975
- Bibcode:
- 1975A&AS...22..243B