An activity catalogue of southern stars

Jenkins, J. S. and Jones, H. R. A. and Tinney, C. G. and Butler, R. P. and McCarthy, C. and Marcy, G. W. and Pinfield, D. J. and Carter, B. D. and Penny, A. J. (2006) An activity catalogue of southern stars. Monthly Notices of the Royal Astronomical Society, 372 (1). pp. 163-173. ISSN 0035-8711

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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 ii H& K 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 R'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. using our Mt. Wilson calibration. The radial-velocity instability (also known as jitter) level was determined for all 21 planet-host stars in our data set. 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 (logR'HK > −4.5) and thus have high levels of jitter. Radial-velocity analysis for planetary companions to these stars should proceed with caution.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Pre-print template-style version deposited in accordance with the copyright policy of the publisher. The definitive version is available at
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 11 Oct 2007 00:56
Last Modified: 02 Jul 2013 22:41
Uncontrolled Keywords: stars; low-mass; brown dwarfs; planetary systems; ultraviolet
Fields of Research : 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
02 Physical Sciences > 0201 Astronomical and Space Sciences > 020108 Planetary Science (excl. Extraterrestrial Geology)
Identification Number or DOI: 10.1111/j.1365-2966.2006.10811.x

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