Six evolved stars in open clusters RVs

We also present periodic and large-amplitude RV signals of probable stellar origin in two more massive stars (5.84 and 3.05M_{sun}_ in the clusters NGC2345 and NGC3532). Finally, using new data, we revise the RV signals of the three stars analysed in our previous paper. We confirm the stellar origin of the signals observed in NGC2423 No. 3 and NGC4349 No. 127.

On the other hand, the new data collected for IC4651 No. 9122 (1.79M_{sun}_) seem to support the presence of a bona fide planet of 6.22MJ at a period of 744 days, although more data will be needed to discard a possible correlation with the CCF-FWHM. The targets presented in this work showcase the difficulties in interpreting RV data for evolved massive stars. The use of several activity indicators (CCF-FWHM, CCF-BIS, Halpha), photometry, and long-term observations (covering several orbital and stellar rotational periods)is required to discern the true nature of the signals.

However, in some cases, all this information is insufficient, and the inclusion of additional data 'such as the determination of magnetic field variability or RV points in the near-infrared' will be necessary to identify the nature of the discovered signals.