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Proxima's orbit around Alpha Centauri
P. Kervella, F. Thévenin, C. Lovis
Proxima and Alpha Centauri AB have almost identical distances and proper motions with respect to the Sun. Although the probability of such similar parameters is in principle very l…
The radii and limb darkenings of Alpha Centauri A and B - Interferometric measurements with VLTI/PIONIER
P. Kervella, L. Bigot, A. Gallenne +1
The photospheric radius is one of the fundamental parameters governing the radiative equilibrium of a star. We report new observations of the nearest solar-type stars Alpha Centaur…
A test field for Gaia. Radial velocity catalogue of stars in the South Ecliptic Pole
Y. Frémat, M. Altmann, E. Pancino +25
Gaia is a space mission currently measuring the five astrometric parameters as well as spectrophotometry of at least 1 billion stars to G = 20.7 mag with unprecedented precision. T…
The Carina Project. X. On the kinematics of old and intermediate-age stellar populations
M. Fabrizio, G. Bono, M. Nonino +14
We present new radial velocity (RV) measurements of old (horizontal branch) and intermediate-age (red clump) stellar tracers in the Carina dwarf spheroidal. They are based on more…