The recently discovered exoplanet TOI-778 b is 530 light years from Earth, orbiting very close to the host star with scorching temperatures..
Identified by NASA’s Transiting Exoplanet Survey Satellite (TESS), TOI-778 b is a typical example of “Hot Jupiter”, term for giant gas planets similar to Jupiter in the solar system but with destructive heat. According to research published on p ArXivthis special celestial body has a radius 1.4 times larger and about 2.9 times heavier than Jupiter, with a surface temperature of up to 1,227 degrees Celsius, enough to melt gold, Space reported on January 3.
Simulation of a hot Jupiter orbiting very close to the host star.
Simulate a hot Jupiter rotating very close to the host star. (Photo: NASA).
TOI-778 b moves away from host star TOI-778 Its distance is about 9 million km or 0.06 astronomical units, or 0.06 times the approximate distance from Earth to the Sun, so close that it takes only 4.6 days to complete one orbit. The planet appears to be more inflated than other hot Jupiters of the same mass.
Meanwhile, TOI-778 is a dwarf star that is 71% larger and 40% more massive than the Sun. It also spins very fast, up to 40 km/s. Astronomers at Australia’s University of Southern Queensland estimate the star is about 1.95 billion years old and its surface temperature ranges from 6,400 to 6,500 degrees Celsius.
The study also found that TOI-778 b’s orbit is almost aligned with TOI-778’s equator. This suggests that the planet arrived at its current position by moving gently across the disk of its host star, rather than through a more chaotic process.
“TOI-778 b joins a group of other hot Jupiters with well-aligned orbits, suggesting that disk movements are likely the cause of their movement to their current positions”said the study’s lead author, Jake T. Clark.
TESS studies around 200,000 of the brightest stars near the Sun in an effort to search for exoplanets passing in front of them. To date, more than 6,100 potential objects have been discovered, of which 282 planets have been confirmed.
Article source: VnExpress
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The exoplanet TOI-778 was recently discovered about 530 light years from Earth, orbiting very close to the host star with scorching temperatures….