Abstract
We present the results of two 2.3 μm near-infrared (NIR) radial velocity (RV) surveys to detect exoplanets around 36 nearby and young M dwarfs. We use the CSHELL spectrograph (R ∼ 46,000) at the NASA InfraRed Telescope Facility (IRTF), combined with an isotopic methane absorption gas cell for common optical path relative wavelength calibration. We have developed a sophisticated RV forward modeling code that accounts for fringing and other instrumental artifacts present in the spectra. With a spectral grasp of only 5 nm, we are able to reach long-term radial velocity dispersions of ∼20-30 m s-1 on our survey targets.
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Plavchan, P., Gao, P., Gagne, J., Furlan, E., Brinkworth, C., Bottom, M., … Regan, J. (2015). Precise Near-Infrared Radial Velocities. In Proceedings of the International Astronomical Union (Vol. 10, pp. 286–287). Cambridge University Press. https://doi.org/10.1017/S1743921315006468
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