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Context. Until 2006, helium emission lines had never been observed in RR Lyrae stars. For the first time, a pre-maximum helium emission in 11 RRab stars was observed during rising light (around the pulsation phase 0.92) and the reappearance of helium emission near maximum light (phase 0.0) in one RRab star: RV Oct. This post-maximum emission...
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To reach a suitable limiting magnitude with a multi-aperture interferometer, we need tocophase the different telescopes using a reference source. The latter should be located in thesame isopistonic domain as the science source. We developed a direct analytical expressionof deducing the isopistonic angle from atmospheric optical parameters as...
Context. Every population of small bodies in the Solar System contains a sizable fraction of multiple systems. Of these, the Jupiter Trojans have the lowest number of known binary systems and they are the least well characterized. Aims. We aim to characterize the reported binary system (17365) Thymbraeus, one of only seven multiple systems of...