An international team of astronomers has discovered a hot new exoplanet of Jupiter with three times the mass of the fifth planet from the sun and the largest planet in the solar system.
According to a paper published in the journal arXiv, the newly discovered exoplanet orbits a rapidly spinning dwarf star 530 light-years from Earth, making one full trip around its sun every five days, RT reports.
The exoplanet, named TOI-778 b, is an example of a so-called hot (or hot) Jupiter, a world similar to the largest planet in our solar system, the gas giant Jupiter, but much closer to its star.
This proximity creates extremely extreme conditions, such as surface temperatures hot enough to vaporize iron and orbits of less than 10 Earth days.
This hot Jupiter orbits its star TOI-778 at a distance of about 5.6 million miles (9 million km), which is much closer to the Sun than the planet Mercury in our solar system, about 29 million miles (46 million km) from the Sun. Our star.
The outer planet TOI-778 b has a radius of 1.4 times the radius of Jupiter, about 2.8 times the mass of the gas giant.
TOI-778 b orbits its host TOI-778 (also known as HD 115447) every 4.6 days. Its surface temperature is estimated at 2,240 degrees Fahrenheit (1,500 K or 1,227 degrees Celsius).
The outer planet’s parent star makes our Sun a dwarf, as it is about 71% more massive than our star (the Sun) and 40% more massive.
TOI-778 is also a fast rotary engine, spinning at about 90,000 mph (40 km/s).
The star’s age is 1.95 billion years less than half that of our 4.6-billion-year-old Sun, and its surface temperature is estimated at 11,600-11,780 degrees Fahrenheit (6,700-6,800 K).
TOI-778 b was observed by astronomers led by USQ scientist Jake T. Clark using NASA’s Transiting Exoplanet Survey Satellite (TESS). By surveying about 200,000 nearby stars, TESS has so far revealed more than 6,000 exoplanet candidates called TESS Objects of Interest (TOI).
Of these planets, 282 exoplanets have been confirmed so far, joining the list of more than 5,000 known exoplanets.
Clark and his team discovered this hot new Jupiter by observing the dip in light from TOI-778 that occurs when the planet passes its parent star from our view on Earth.
The planetary nature of TOI-778 b has been confirmed by subsequent observations with ground-based telescopes and measurements of the system’s velocity.
Clark and his team also found that TOI-778 b’s orbit is close to its dwarf star’s stellar equator, and they believe the planet may have quietly migrated through the plane of its host star, TOI-778, rather than arriving there. This place has arrived. Point through the messy process.