Precision Rvs In The Nir: First On-sky Velocities With A U/ne Lamp And A Laser Frequency Comb

Details Precision Rvs In The Nir: First On-sky Velocities With A U/ne Lamp And A Laser Frequency Comb Precision Rvs In The Nir: First On-sky Velocities With A U/ne Lamp And A Laser Frequency Comb

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ess.....2.0206m&link_type=abstract

American Astronomical Society, ESS meeting #2, #2.06

Astronomy and Astrophysics

Astronomy

Scientific paper

Precision radial velocities in the near infrared (NIR) can help detect terrestrial mass planets around mid and late M dwarfs that are typically too faint in the optical for effective monitoring. The NIR poses a new set of calibration and technology challenges. We will discuss the current state of the art in NIR spectroscopy, and RV precision and present ongoing work at Penn State with the Pathfinder NIR testbed. With the Pathfinder we have demonstrated 10-20 m/s radial velocity precision in the NIR Y band at the 9m Hobby Eberly telescope using a Uranium-Neon hollow cathode lamp as a simultaneous wavelength reference. We shall present these results and also new velocity results from recent first on-sky observations with an H band laser frequency comb developed at NIST and CASA. The innate stability and known frequencies of the comb lines provides an excellent calibrator in the H band, but numerous systematics like fiber modal noise, tellurics, and detector calibration need to be overcome. We will discuss progress made on all these fronts with experiments on the Pathfinder testbed.
We acknowledge support from NSF, NASA, NAI, NIST, Penn State, and the Center for Exoplanets & Habitable Worlds.

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