Astronomers have discovered two giant exoplanets 353 and 524 light-years from Earth
Scientists have announced the discovery of two giant exoplanets. A preprint of an article about this is published at arXiv.org.
The observations were made with the TESS orbiting telescope, specially adapted to search for exoplanets. His instruments are capable of detecting the slightest fluctuations in the brightness of stars as a planet passes across their disk.
Signs of planetary existence have been found in two red dwarfs, TOI-3984A and TOI-5293A, both of which are components of a binary system. Planet TOI-3984A b has a radius of about 0.71 Jupiter radii and a mass of 0.14 Jupiter masses. Its orbital period is 4.35 days, its orbital height is 0.041 astronomical units, and its equilibrium temperature is estimated at 563 kelvins, thus it has been classified as a sub-Saturn. The parent star of this planet has a mass half that of the Sun, the distance to the Earth is 353 sv. of the year.
The planet TOI-5293A b is as large as Jupiter but less massive, with a mass of about 0.54 Jupiter masses. The period of revolution is 2.93 days, and the height of the orbit is 0.034 astronomical units. This planet is hotter than the first, with a surface temperature of 675 kelvins, and therefore it was identified as a hot Jupiter. The parent star of this hot Jupiter is 524 sv. years, but also half the size of the Sun.
Summing up, the authors of the article emphasized that TOI-3984A b and TOI-5293A b are the two coldest known hot gas giants among Jupiter-sized exoplanets orbiting M-dwarfs.