HARPS Long-Term Results: Effects of Stellar Magnetic Cycles, and Planet Detection Limits

Details HARPS Long-Term Results: Effects of Stellar Magnetic Cycles, and Planet Detection Limits HARPS Long-Term Results: Effects of Stellar Magnetic Cycles, and Planet Detection Limits

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ess.....2.0202l&link_type=abstract

American Astronomical Society, ESS meeting #2, #2.02

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a global analysis of the long-term radial-velocity behavior of solar-type stars, based on the HARPS exoplanet survey. Various spectroscopic indicators allow us to measure stellar magnetic cycles, derive their statistical properties, and study their impact on radial velocities. We discuss their effects on exoplanet detection and present strategies to separate stellar and planetary signals. We also confirm the existence of a population of quiet, non-cycling stars. We finally show that HARPS is able to detect planets of a few Earth masses in the habitable zone of quiet late-G and K dwarfs, using the datasets available today on well-measured stars.

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