Publications (20)
MUS Revisited:Rectifying an 82 Yr-Old Mistake
Dimitri Pourbaix, Henri M. J. Boffin
The red giant Muscae is known since 1919 to be a spectroscopic binary, and the first and only orbit was determined in 1936, claiming the period to be 847 days. This was discre…
Detecting the Companions and Ellipsoidal Variations of RS CVn Primaries: I. sigma Geminorum
Rachael M. Roettenbacher, John D. Monnier, Gregory W. Henry +17
To measure the properties of both components of the RS CVn binary sigma Geminorum (sigma Gem), we directly detect the faint companion, measure the orbit, obtain model-independent m…
A Planet at 5 AU Around 55 Cancri
Geoffrey W. Marcy, R. Paul Butler, Debra A. Fischer +4
We report precise Doppler shift measurements of 55 Cancri (G8V) obtained from 1989 to 2002 at Lick Observatory. The velocities reveal evidence for an outer planetary companion to 5…
Masses of the components of SB2 binaries observed with Gaia. I. Selection of the sample and mass ratios of 20 new SB2s discovered with Sophie
Jean-Louis Halbwachs, Frédéric Arenou, Dimitri Pourbaix +7
In anticipation of the Gaia astrometric mission, a large sample of spectroscopic binaries is being observed since 2010 with the Sophie spectrograph at the Haute--Provence Observato…
Re-processing the Hipparcos Transit Data and Intermediate Astrometric Data of spectroscopic binaries. I. Ba, CH and Tc-poor S stars
Dimitri Pourbaix, Alain Jorissen
The Intermediate Astrometric Data (IAD) and Transit Data (TD) made available by ESA after the Hipparcos mission make it possible to re-process the observations of any Hipparcos ent…
Limits in astrometric accuracy induced by surface brightness asymmetries in red supergiant stars
Ester Pasquato, Dimitri Pourbaix, Alain Jorissen
Surface brightness asymmetries are a very common feature of stars. Among other effects they cause a difference between the projected barycentre and photocentre. The evolution of th…