Sabine Reffert, Ralf Launhardt, Saskia Hekker, Thomas Henning, Didier Queloz, Andreas Quirrenbach, ...
Abstract. ESO’s PRIMA (Phase-Referenced Imaging and Micro-arcsecond Astrometry) facility at the VLT Interferometer on Cerro Paranal in Chile is expected to be fully operational in only a few years...
Arentoft, Torben, Kjeldsen, Hans, Bedding, Timothy R., Bazot, Michael, Christensen-Dalsgaard, Joergen, Dall, Thomas H., ...
We have carried out a multi-site campaign to measure oscillations in the F5 star Procyon A. We obtained high-precision velocity observations over more than three weeks with eleven telescopes, with...
Radial velocity variations in red giant stars : pulsations, spots and planets (2007)
Radial velocity variations in K giants are observed on long (order hundreds of days) and short (order hours) time scales. Short term variations are most likely caused by solar-like oscillations,...
Retired A Stars and Their Companions: Exoplanets Orbiting Three Intermediate-Mass Subgiants (2007)
Johnson, John A., Fischer, Debra A., Marcy, Geoffrey W., Wright, Jason T., Driscoll, Peter, Butler, R. P., ...
We report precision Doppler measurements of three intermediate-mass subgiants from Lick and Keck Observatories. All three stars show variability in their radial velocities consistent with planet-mass...
Precise Radial Velocities of Giant Stars II. Pollux and its Planetary Companion (2006)
Reffert, Sabine, Quirrenbach, Andreas, Mitchell, David S., Albrecht, Simon, Hekker, Saskia, Fischer, Debra A., ...
It has long been speculated that the observed periodic radial velocity pattern for the K giant Pollux might be explained in terms of an orbiting planetary companion. We have collected 80...
Radial Velocity Variations in K Giants: Planets or Pulsations? (2005)
Hekker, Saskia, Reffert, Sabine, Quirrenbach, Andreas
Radial velocity observations of K giants have revealed periodic variations for some of the stars. The periods range from approximately 180 to 1000 or more days with velocity amplitudes ranging from...