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Extreme Precision in Radial Velocity IV

17–21 Mar 2019
Sunstar Hotel, Grindelwald, Switzerland
Europe/Zurich timezone

Xavier Dumusque

Session

Stellar signals 1

st1
18 Mar 2019, 09:00
Sunstar Hotel, Grindelwald, Switzerland

Sunstar Hotel, Grindelwald, Switzerland

Dorfstrasse 168, 3818 Grindelwald Switzerland

Presentation materials

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  1. 77. Mitigating stellar signals to reveal other Earths: review on the impact of stellar activity on exoplanet detectability
    Dr Nadège Meunier (University of Grenoble)
    18/03/2019, 09:00
    Stellar signals
    Oral

    The first part of this review will be devoted to the different stellar processes leading to spurious radial velocities. They are due to magnetic activity (spots, plages, and flares to a lesser extent) and to flows at various scales (from granulation to meridional circulation), or a combination of both (inhibition of the convective blueshift in plages). The second part of the talk will review ...

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  2. 53. Studying Radial-velocity variations of active stars in the CARMENES Survey for Exoplanets
    Ms Sepideh Sadegi (Landessternwarte/MPIA Heidelberg)
    18/03/2019, 09:30
    Stellar signals
    Oral

    Understanding the effect of stellar activity on the measured radial velocity (RV) is essential for the reliable detection of exoplanets around stars. It becomes even more vital when we are searching for low-mass planets around M-dwarfs, which are known to be particularly affected by active regions. Photospheric activity features in M-dwarfs stem from the depth of the convective layers and...

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  3. 24. HARPS-N radial velocities from the Sun-as-a-star
    Annelies Mortier (University of Cambridge)
    18/03/2019, 09:50
    Stellar signals
    Oral

    Distinguishing between a signal induced by stellar activity or a planet is the main challenge in radial velocity (RV) searches for low-mass exoplanets these days. Even when the presence of a transiting planet and hence its period are known, stellar activity is often the main barrier in nailing down the correct amplitude of the planetary signal. Observing the Sun-as-a-star provides a unique...

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  4. 74. Line by line radial velocities to mitigate stellar activity
    Xavier Dumusque (Université de Genève)
    18/03/2019, 10:10
    Stellar signals
    Oral
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