2008/06/23 by L. W. Ramsey, J. Barnes, S. L. Redman +5 · 1 citation
Engineering · Physics and Astronomy · #Adaptive optics and wavefront sensing #Astronomical Observations and Instrumentation #Astronomy and Astrophysical Research #astro-ph
paper · pdf · doi:10.1086/591233
18 pages, 8 figures, accepted for publication in PASP
arxiv created 2008/06/23 · openalex publication_date 2008/08/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04
We have designed and tested an in-plane echelle spectrograph configured to investigate precision radial velocities from ground-based near-infrared observations. The spectrograph operates across the spectral range of 0.9–1.7 μm at a spectral resolution of R = 50,000, and uses a liquid nitrogen-cooled HAWAII 1 K detector. Repeated measurements of the Earth's rotation via integrated sunlight with two different instrument arrangements in the near-infrared Y band have produced radial velocities with ∼10 m s -1 rms over a period of several hours. The most recent instrument configuration has achieved an unbinned rms of 7 m s -1 and suggests that infrared radial velocity precisions may be able to approach those achieved at optical wavelengths.