Searching for Planets in the Hyades V: Limits on Planet Detection in the Presence of Stellar Activity

Details Searching for Planets in the Hyades V: Limits on Planet Detection in the Presence of Stellar Activity Searching for Planets in the Hyades V: Limits on Planet Detection in the Presence of Stellar Activity

2004-02-24

arxiv.org/abs/astro-ph/0402569v1

Astronomy and Astrophysics

Astrophysics

To appear in the June 2004 issue of AJ

Scientific paper

10.1086/420710

We present the results of a radial velocity survey of a sample of Hyades stars, and discuss the effects of stellar activity on radial velocity measurements. The level of radial velocity scatter due to rotational modulation of stellar surface features for the Hyades is in agreement with the predictions of Saar & Donahue (1997)- the maximum radial velocity rms of up to ~50 m/s, with an average rms of ~16 m/s. In this sample of 94 stars, we find 1 new binary, 2 stars with linear trends indicative of binary companions, and no close-in giant planets. We discuss the limits on extrasolar planet detection in the Hyades and the constraints imposed on radial velocity surveys of young stars.

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