Precise Near-Infrared Radial Velocities
We present the results of two 2.3 micron near-infrared radial velocity 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, 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 on our survey targets.
Physics, Astronomy, and Materials Science
Plavchan, Peter, Peter Gao, Jonathan Gagne, Elise Furlan, Carolyn Brinkworth, Michael Bottom, Angelle Tanner et al. "Precise Near-Infrared Radial Velocities." Proceedings of the International Astronomical Union 10, no. S314 (2015): 286-287.