Using the TESS space telescope, researchers found a star system in which around a dwarf
Researchers have discovered a massive browndwarf during its transit across the star's disk. Analysis of the light curve changes showed that this substellar object is approximately the size of Jupiter, but the mass of the brown dwarf is 77 times greater. It orbits the star every 1.72 days at a distance of 0.025 AU
Brown dwarfs are intermediateobjects between planets and stars, occupying a mass range between 13 and 80 Jupiter masses. In the depths of these substellar objects, thermonuclear reactions can already occur, but their power is not enough for constant luminosity. The mass estimate for TOI-5375 b places it on the upper boundary: between brown dwarfs and very low-mass stars.
The researchers also note that althoughquite a lot of brown dwarfs have been discovered, such finds as TOI-5375 b are rare. As a rule, researchers find individual brown dwarfs that form from a collapsing molecular cloud and form their own system. Only a few such substellar objects are known to orbit another star.
The researchers believe that further studyThis system, including using the most powerful modern telescopes, will help to better understand the formation of massive brown dwarfs and low-mass stars.
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Cover: Artist's illustration of a cool dwarf star. Image: NASA/JPL-Caltech