The pulsating sdB+M eclipsing system NY Virginis and its circumbinary planets

摘要: We searched for circumbinary planets orbiting NY Vir in historical eclipse times including our long-term CCD data. Sixty-eight of minimum light with accuracies better than 10 s were used the ephemeris computations. The best fit to those timings indicated that orbital period has varied due a combination two sinusoids periods P3=8.2 yr and P4=27.0 semi-amplitudes K3=6.9 K4=27.3 s, respectively. periodic variations most likely arise from pair light-time effects presence third fourth bodies are gravitationally bound eclipsing pair. have derived parameters masses, M3 sini3 = 2.8 MJup M4 sini4 4.5 MJup, both objects. A dynamical analysis suggests outer companion is less orbit binary on circular orbit. Instead we show future timing data might push its eccentricity moderate values which system exhibits stability. results demonstrate probably star-planet system, consists very close star giant planets. ratio P3/P4 gravitational interaction between them would result capture into nearly 3:10 mean motion resonance. When verified understood more comprehensively, formation evolution this planetary should be advanced greatly.