Tag: nane brune

Fifteen spectral indices to select planetary-mass objects. The study: “Spectral characterization of young LT dwarfs” of L. Piscarreta (CENTRA, ESO) appeared on A&A

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Understanding the star formation process also means acquiring a full understanding of its final products, such as the mass distribution of the stars formed in a single star-formation event (which is the initial mass function). In particular, it is still not clear what the dominant mechanism responsible for the formation of the less massive sources is: the planetary-mass objects, with

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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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The program “Testing protoplanetary disk evolution and brown dwarf formation in starburst: NIRCAM and MIRI observations of the young cluster Westerlund 1” of M. G. Guarcello (INAF – OAPA) is among the accepted proposals of the JWST Cycle 1

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The James Webb Telescope (JWST) will be the most complex and powerful telescope ever launched into space. Built by a consortium formed by NASA, ESA, and the Canadian Space Agency (CSA), thanks to its primary mirror with a diameter of 6.5 meters (for comparison, the mirror of the Hubble Space Telescope has a diameter of 2.5 meters) and its four

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