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.
@article{arxiv.1603.05999,
title = {Precise Near-Infrared Radial Velocities},
author = {Peter Plavchan and Peter Gao and Jonathan Gagne and Elise Furlan and Carolyn Brinkworth and Michael Bottom and Angelle Tanner and Guillem Anglada-Escude and Russel White and Cassy Davison and Sean Mills and Chas Beichman and John Asher Johnson and David Ciardi and Kent Wallace and Bertrand Mennesson and Gautam Vasisht and Lisa Prato and Stephen Kane and Sam Crawford and Tim Crawford and Keeyoon Sung and Brian Drouin and Sean Lin and Stephanie Leifer and Joe Catanzarite and Todd Henry and Kaspar von Braun and Bernie Walp and Claire Geneser and Nick Ogden and Andrew Stufflebeam and Garrett Pohl and Joe Regan},
journal= {arXiv preprint arXiv:1603.05999},
year = {2016}
}
Comments
To appear in "Young Stars and Planets Near the Sun", Proceedings of IAU Symposium No. 314 (Cambridge University Press), J.H. Kastner, B. Stelzer, S.A. Metchev, eds