Four years’ interferometric observations of Galactic binary Cepheids
1 European Southern Observatory, Alonso de Córdova 3107, Casilla 19001, Santiago 19, Chile
2 LESIA, Obs. de Paris, CNRS UMR 8109, UPMC, Univ. Paris 7, 5 Pl. Jules Janssen, 92195 Meudon, France
3 Smithsonian Astrophysical Observatory, MS 4, 60 Garden Street, Cambridge, MA 02138, USA
4 Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
5 Nicolaus Copernicus Astro. Centre, Polish Academy of Sci., Bartycka 18, PL-00-716 Warszawa, Poland
6 Universidad de Concepción, Departamento de Astronomía, Casilla 160-C, Concepción, Chile
Published online: 8 September 2017
We give an update on our long-term program of Galactic Cepheids started in 2012, whose goal is to measure the visual orbits of Cepheid companions. Using the VLTI/PIONIER and CHARA/MIRC instruments, we have now detected several companions, and we already have a good orbital coverage for several of them. By combining interferometry and radial velocities, we can now derive all the orbital elements of the systems, and we will be soon able to estimate the Cepheid masses.
© The Authors, published by EDP Sciences, 2017
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