(Gyrs)                     4$\pm$3            3$\pm$3            8$\pm$3             11$\pm$4          2$\pm$3               
  ------------------------------ ------------------ ------------------ ------------------- ----------------- --------------------- -----------------

\* - colour calculated from magnitudes drawn from the Tycho-2 catalogue ([@hog00]).\
We assign a standard $\pm$100K uncertainty to the measurements and $\pm$0.10 dex to the metallicities.\
$\pi$ values come from @vanleeuwen07 and all other Hipparcos parameters are taken from @perryman97.\
Evolutionary bulk properties and spectrally measured indices were either computed in this work or taken from @jenkins08, @jenkins11a, and @murgas13.\
$[$Fe/H$]$ abundances, spectroscopic  values, and rotational velocities were calculated using the procedures in @pavlenko12 and taken from @ivanyuk16.

The selection of the Calan-Hertfordshire Extrasolar Planet Search (CHEPS) target sample is discussed in @jenkins09 but we outline the main selection criteria here. The stars are generally selected to be late-F to early-K stars, with a $B-V$ range between 0.5-0.9, and with a small number of redder stars included to allow the study of activity correlations and timescales between activity indicators and the measured Doppler velocities. The positions of the CHEPS sample on a colour-magnitude diagram are shown in Fig. \[hr\_plot\] (squares) compared to a general selection of nearby stars from the Hipparcos catalogue (circles), along with the targets discussed in this work (stars). The magnitude limits we 