An international team of astronomers have found four new giant exoplanets as a part of HATSouth photometric survey. The newfound exoplanets are the size of Jupiter and they have been named as HATS-74Ab, HATS-75b, HATS-76b and HATS-77b. The research paper has been published in arXiv.org.
HATSouth is a combination of six astrograph telescope systems in South America, Africa and Australia. All these telescopes have been designed to detect exoplanets that are orbiting relatively bright stars which is visible from Southern hemisphere. This mission was launched in 2009 and since then the telescopes have detected dozens of exoplanets.
A team of astronomer led by Adolfo Ibáñez of the University in Santiago’s Andres Jordan has reported the finding of four new exoplanets by using HATSouth telescopes. They have found transit signals of these four planets. After this finding, the astronomers have made sure of the existence of the exoplanets by using NASA’s Transiting Exoplanet Survey Satellite.
Astronomers have said that they found the existence of exoplanets around early M and late K dwarfs. According to the researchers, HATS-74Ab is the same size of Jupiter but the planet is also more massive than the solar system’s biggest planets. The star is at a distance of 0.024 AU from its host star and it orbits around its host star is every 1.73 days. The planet has an equilibrium temperature of 895 K. The planet is also 11 billion years old and the effective temperature of this planet is 3,777 K. This planet also has a stellar companion that astronomers named as HATS-74B.
HATS-75b is the smallest exoplanet among the four new found exoplanets. It orbits around its host star in 2.79 days and it is at a distance of 0.032 AU from its host star. The equilibrium temperature of the planet is 772.3 K. This star is about 637 light years away from the Earth.