Detectability of Earth-mass planets with RV and astrometric technics around Sun-like stars

Details Detectability of Earth-mass planets with RV and astrometric technics around Sun-like stars Detectability of Earth-mass planets with RV and astrometric technics around Sun-like stars

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ess.....2.4106d&link_type=abstract

American Astronomical Society, ESS meeting #2, #41.06

Astronomy and Astrophysics

Astronomy

Scientific paper

We present the results of detailed simulations of the RV and astrometric signals expected from the Sun, when taking into account its activity (spots, plages, convection). To do so, we considered all structures (2,000,000) identified on the Sun surface over a full cycle. We show that the Sun activity would prevent the detection of the Earth (and Earth-mass planets in the Habitable Zone) with RV technics with today or forthcoming instruments, mainly because of convection. Concerning the astrometric technic, though, the detectability around Sun-like stars is governed by the instrumental precision rather than the activity. Therefore, he activity-induced astrometric signal is much less important than the RV one for an Earth-like planet detection.

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