A pathfinder instrument for precision radial velocities in the near-infrared

L. W. Ramsey, J. Barnes, S. L. Redman, H. R.A. Jones, A. Wolszczan, S. Bongiorno, L. Engel, J. Jenkins

Research output: Contribution to journalArticlepeer-review

31 Scopus citations


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 4 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 nns-1 and suggests that infrared radial velocity precisions may be able to approach those achieved at optical wavelengths.

Original languageEnglish (US)
Pages (from-to)887-894
Number of pages8
JournalPublications of the Astronomical Society of the Pacific
Issue number870
StatePublished - Aug 2008

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


Dive into the research topics of 'A pathfinder instrument for precision radial velocities in the near-infrared'. Together they form a unique fingerprint.

Cite this