Browsing by Author "Ramsey, L."

Now showing items 1-3 of 3

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

      Ramsey, L.; Barnes, John; Redman, S.L.; Jones, H.R.A.; Wolscznan, A.; Bongiorno, S.; Engel, L.; Jenkins, J.S. (2008)
      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 ...

    • Precision radial velocities in the infrared 

      Jones, H.R.A.; Rayer, J.; Ramsey, L.; Dent, B.; Longmore, A.J.; Vacva, B.; Liu, M.; Webster, A.; Wolscznan, A.; Barnes, A. (2009)
      Over 250 extra-solar planets have been discovered to date using a variety of techniques. The majority have been discovered at optical wavelengths from the Doppler shift of F, G and K stars induced by orbiting planets. We ...

    • Rotational velocities for M dwarfs 

      Jenkins, J.S.; Ramsey, L.; Jones, H.R.A.; Pavlenko, Y.; Gallardo, J.; Barnes, J.R.; Pinfield, D.J. (2009)
      We present spectroscopic rotation velocities (v sin i) for 56 M dwarf stars using high-resolution Hobby-Eberly Telescope High Resolution Spectrograph red spectroscopy. In addition, we have also determined photometric ...