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Finally a realistic model for Altaïr, a star with extreme rotation!

Altaïr, a bright star in the summer sky, is known for its very fast rotation. The centrifugal effect is such that its polar radius is 20% smaller than its equatorial radius. This large deviation from the sphere has made the modelling of Altaïr impossible by classical approaches in stellar physics. For the first time, its […]

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NASA’s NICER mission gives us the best measurements of a pulsar and its cartography for the first time

Thanks to NASA’s NICER (Neutron Star Interior Composition Explorer) mission, scientists have taken a major step forward in understanding pulsars, the extremely dense remnants of stars that have exploded into supernova. The mission’s X-ray telescope, installed on the International Space Station, provided the first accurate and reliable measurements of a pulsar’s mass and radius, and […]

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Monitoring the birth of a volcano off the coast of Mayotte

Seismological analyses highlighted the stages of formation of the new submarine volcano off the coast of Mayotte and the drainage of a deep magma reservoir. The birth of a new volcano was announced this year after the oceanographic campaign conducted by the IPGP in May 2019 (MAYOBS1 campaign, carried out within a CNRS-INSU program) off […]