Astronomers of the University of Pennsylvania and other scientific organizations discovered a massive brown dwarf, which rotates around the red dwarf star TOI-2119. The object almost 70 times is massive than Jupiter and rotates around the parent luminaries on an eccentric orbit. This is reported in the preprint of articles in the ARXIV repository.
Brown pictures occupy an intermediate position between gas giants and low-mass stars and have a range of 13 to 80 masses of Jupiter. Brown dwarfs, which rotate around other stars, are quite rare, but those objects that are removed from parental luminaries at a distance of less than three astronomical units (A.E.), are revealed even less often. Such celestial bodies refer to the so-called “brown dwarf desert.”
TOI-2119.01 was identified using the NASA Transiting Exoplanet Survey Satellite satellite (TESS). It has a mass of about 67 masses of Jupiter, and its radius was estimated as about 1.11 of the Jupiter radius, which corresponds to a density of 60 grams per cubic centimeter. Brown Dwarf turns around the TOI-2119 every 7.2 days on an elongated orbit at an angle of 88.51 degrees at a distance of approximately 0.064 AE. from her. Scientists believe that it arose as a result of gravitational instability in the protoplanetary disk.
TOI-2119 is a M-dwarf, which in size and mass twice as much as the sun. It has a period of rotation of 13.2 days, the metallicity (the content of elements is heavier than helium) at the level of 0.1, and its effective temperature is estimated at 3553 Kelvin. Based on the period of rotation, astronomers suggest that the age of TOI-2119 is most likely between 700 million and 5.1 billion years.