PN A66 70 i-band light curve

Time-series photometry obtained over a period of more than ten years demonstrates that the barium-contaminated companion is a rapid rotator with temporal variability due to spots. The amplitude and phasing of the photometric variability changes abruptly, however there is no evidence for a change in the rotation period (P=2.06d) over the course of the observations.

The co-addition of 17 high-resolution spectra obtained with VLT-UVES allow us to measure the physical and chemical properties of the companion, confirming it to be a chromospherically-active, late G-type sub- giant with more than +1dex of barium enhancement. We find no evidence of radial velocity variability in the spectra, obtained over the course of approximately 130d with a single additional point some 8 years later, with the radial velocities of all epochs approximately -10km/s from the previously measured systemic velocity of the nebula.