An international group of astronomers discovered four new gigantic exoplans with Jupiter. The planets were detected by the transit method using ground telescopes of the photometric review Hatsouth and obtained HATS-74ab, HATS-75B, HATS-76B and HATS-77B. Stars around which gas giants rotate are related to M- (red stars) and k-dwarfs (orange). The opening is reported in preprint of articles published in the repository ARXIV.
Although the size of the Planet HATS-74ab is comparable to Jupiter, it is about 46 percent of the massive than the largest planet of the solar system. It revolves around his star every 1.73 days at a distance of 0.024 astronomical units (A.E.) from it and has an equilibrium temperature of 895 Kelvinov (K). The age of the parent star is about 11 billion years, its radius is approximately 0.57 of the radius of the sun, the mass of about 0.6 of the mass of the Sun and has an effective temperature of 3777 K. The system is located in 934 light years from the ground.
HATS-75B is the smallest and least massive exoplanet (0.88 radius of Jupiter and 0.49 masses of Jupiter). Its orbital period is approximately 2.79 days, and the distance from the parent star – 0.032 AE. The star itself, which is in 637 light years from the Earth, has almost 15 billion years. The third exoplanet – HATS-76B – drawn around the star every 1.94 days at a distance of 0.026 AE. From her and is the hottest planet of four with an equilibrium temperature of 939.8 K. It is removed from the ground for 1271 light years.
The latest exoplanet HATS-77B is about 16 percent more and 37 percent is massive than Jupiter. The orbital period of exoplanets is almost 3.09 days, and it turns around its parent star at a distance of about 0.036 AE. The equilibrium temperature of HATS-77B is equal to 828.3 K. The age of the system is estimated at 12.1 billion years, and the distance to it is 1349 light years.