Precision Radial Velocities At Red-optical Wavelengths

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

We discuss use of the 0.7 - 0.9 micron region for radial velocity surveys aimed at searching for low mass planets orbiting M5 - M9.5 dwarfs. For low-mass stars, the 2.5-5 magnitude gain at I band offers a clear effciency advantage when compared with traditional V-band wavelengths. We investigate the advantages and disadvantages of different techniques used to derive radial velocities in this wavelength regime and present preliminary results from our MIKE/Magellan survey.

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