SIMBAD references

2000A&A...361..265S - Astronomy and Astrophysics, volume 361, 265-272 (2000/9-1)

The CORALIE survey for Southern extra-solar planets. IV. Intrinsic stellar limitations to planet searches with radial-velocity techniques.

SANTOS N.C., MAYOR M., NAEF D., PEPE F., QUELOZ D., UDRY S. and BLECHA A.

Abstract (from CDS):

Activity related phenomena can induce radial-velocity variations, which can be very important when dealing with extra-solar planet search programmes requiring high-precision radial-velocity measurements. In this paper we present a new chromospheric activity index, SCOR, based on the CaII H line central reemission, and constructed using CORALIE spectra. After one year of measurements, values of SCOR are available for a sub-sample of stars of the Geneva extra-solar planet search programme. After transforming the SCOR values into the Mount-Wilson ``S'' scale we obtained values of the CaII H and K flux corrected from photospheric emission (R'HK) for the stars. The first results are presented, and in particular we focus on the study of the relation between the observed radial-velocity scatter and the chromospheric activity index R'HK, for F, G and K dwarfs.

Abstract Copyright:

Journal keyword(s): techniques: radial velocities - stars: planetary systems - stars: activity - stars: starspots

Simbad objects: 24

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2020.01.21-22:05:59

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