ESO DOI Service

• Pawlak, Michał [Astronomical Observatory, Jagiellonian University, Kraków, Poland]
• Mazeh, Tsevi [School of Physics and Astronomy, Tel Aviv University, Israel]
• Faigler, Simchon [School of Physics and Astronomy, Tel Aviv University, Israel]
• Shenar, Tomer [Anton Pannekoek Institute for Astronomy, Amsterdam, the Netherlands]
• Sana, Hugues [Institute of Astronomy, KU Leuven, Belgium]
• Bashi, Dolev [School of Physics and Astronomy, Tel Aviv University, Israel]

The goal of the Spectroscopic Discovery of Binaries with Dormant Black Holes survey is to spectroscopically follow up stars that might have dormant compact companions, either black holes or neutron stars. These stars have been identified as ellipsoidal binaries in the Magellanic Clouds by the Optical Gravitational Lensing Experiment (OGLE). A sample of more than 700 ellipsoidals with periods shorter than 10 days will be observed to obtain multi-epoch radial-velocity measurements. 4MOST radial velocities in conjunction with OGLE photometry will allow the determination of the secondary component mass and hence the identification of systems with compact companions.