Tag: brown dwarf

A planet and a brown dwarf for TOI-179. The paper: “TOI-179: A young system with a transiting compact Neptune-mass planet and a low-mass companion in outer orbit” of S. Desidera (INAF – OAPd) appeared on A&A

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Typically, planets did not form at the distance from their central stars where we observe them today. In fact, during their early evolution, planets migrate from their initial orbit until the system reaches its final configuration. Planetary migration can be induced by several processes: the interaction between the newborn planets and the protoplanetary disk where they formed, the gravitational interaction

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A binary system in orbital synchronization. The study: “The GAPS programme at TNG. XLIII. A massive brown dwarf orbiting the active M dwarf TOI-5375” of J. Maldonado (INAF – OAPA) appeared on A&A

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Nature sets a lower limit on stellar masses: objects less massive than 0.07-0.08 solar masses are incapable of initiating the thermonuclear reactions that power more massive stars. Below this threshold lies the realm of brown dwarfs, objects whose mass is too small to qualify as stars, yet too large to be categorized as planets.   The mechanism responsible for the

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“X-ray orbital modulation of a white dwarf accreting from an L dwarf” pubblicato su A&A

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L’astronoma Beate Stelzer dell’Osservatorio Astronomico di Palermo è autrice dell’articolo “X-ray orbital modulation of a white dwarf accreting from an L dwarf” pubblicato su Astronomy & Astrophysics. Nell’articolo sono analizzati i dati ai raggi X ottenuti da osservazioni con il satellite XMM/Newton del sistema binario SDSS J121209.31+013627.7, composto da una nana bianca ed una nana bruna. Nello studio è riportata la

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