Photoelectric photometry of the W UMa binary SX Corvi and of the RS CVn binary HD 155555 is presented. For SX Crv we confirm the existence of photometric changes in the light curve on consecutive nights as already observed by Sanwal et al. (1974). The variations are particularly evident during minima. A new determination of the period is performed, though there are problems with the nearly equal depths of primary and secondary minima and with the long time interval between the available epochs. For HD155555 we present for the firsttime an almost complete light curve, confirming its suspectedvariability. The light curve shape resembles that seen in other RS CVnbinaries; moreover, there are non-repetitive variations probably dueto intrinsic cycle-to-cycle changes in the system.
Photometry of southern stars. I - The W UMa binary SX Corvi and the RS CVn binary HD 155555
BUSSO, Maurizio Maria
1984
Abstract
Photoelectric photometry of the W UMa binary SX Corvi and of the RS CVn binary HD 155555 is presented. For SX Crv we confirm the existence of photometric changes in the light curve on consecutive nights as already observed by Sanwal et al. (1974). The variations are particularly evident during minima. A new determination of the period is performed, though there are problems with the nearly equal depths of primary and secondary minima and with the long time interval between the available epochs. For HD155555 we present for the firsttime an almost complete light curve, confirming its suspectedvariability. The light curve shape resembles that seen in other RS CVnbinaries; moreover, there are non-repetitive variations probably dueto intrinsic cycle-to-cycle changes in the system.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
