An Activity Catalogue of Southern Stars

Authors:
  • JJJ. S. Jenkins
    J. S. Jenkins
  • HJH. R. A. Jones
    H. R. A. Jones
  • CTC. G. Tinney
    C. G. Tinney
  • RBR. P. Butler
    R. P. Butler
  • CMC. McCarthy
    C. McCarthy
  • GMG. W. Marcy
    G. W. Marcy
  • DPD. J. Pinfield
    D. J. Pinfield
  • BCB. D. Carter
    B. D. Carter
  • APA. J. Penny
    A. J. Penny
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Abstract
We have acquired high-resolution echelle spectra of 225 F6-M5 type stars in the southern hemisphere. The stars are targets or candidates to be targets for the Anglo-Australian Planet Search. Ca$\small{\rmn{\textsc{II}}}$~HK line cores were used to derive activity indices for all of these objects. The indices were converted to the Mt. Wilson system of measurements and log\emph{R}$'_{\rmn{HK}}$ values determined. A number of these stars had no previously derived activity indices. In addition we have also included the stars from Tinney et al. (2002) using our Mt. Wilson calibration. The radial-velocity instability (also known as jitter) level was determined for all 21 planet-host stars in our dataset. We find the jitter to be at a level considerably below the radial-velocity signatures in all but one of these systems. 19 stars from our sample were found to be active (log\emph{R}$'_{\rmn{HK}}$~$>$~-4.5) and thus have high levels of jitter. Radial-velocity analysis for planetary companions to these stars should precede with caution.