Using NASA's Transiting Exoplanet Survey Satellite (TESS), astronomers have discovered an Earth-sized planet passing by the young Sun-like star HD 63433.
HD 63433d is located close to its parent star HD 63433, with two neighboring mini-Neptune-sized planets HD 63433b and HD 63433c orbiting further out. Image credit: Alyssa Jankowski.
HD 63433 is a G5V star located approximately 73 light years away in the constellation Gemini.
The star, also known as TOI-1726, is a member of the 414-million-year-old Moving Star Group in the Ursa Major constellation.
The newly discovered exoplanet HD 63433d is the third planet detected in this multi-planet system.
The discovery of two other planets — HD 63433b and HD 63433c (both mini-Neptunes) report By Astronomer in 2020.
The HD 63433d is tidally locked, meaning it has a day side that is always facing the stars and a side that is always in the dark.
The planet has an orbital period of 4.2 days and is very hot on its dayside (1,257 degrees Celsius, or 2,294 degrees Fahrenheit).
“These scorching temperatures are comparable to the lava world of: Corot-7b and Kepler-10bAnd we think the dayside of this planet may be a 'lava hemisphere,''' said the University of Florida astronomer. benjamin capistrant and his colleagues.
HD 63433d is the smallest known exoplanet less than 500 million years old.
The planet is also the closest Earth-sized exoplanet to be discovered at such a young age.
“HD 63433d is the closest planet to our solar system, orbiting a young star with a radius similar to Earth,” the astronomers said.
“This is therefore an attractive target for follow-up observations and provides an opportunity to uncover insights into the physics of atmospheric mass loss in exoplanets.”
“Between HD 63433d and the two larger planets known to date, the HD 63433 system is poised to play a key role in understanding the evolution of planetary systems during the first billion years after their formation. I am.”
The discovery of HD 63433d is paper inside astronomy magazine.
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Benjamin K. Capistrant other. 2024. TESS Search for Young and Mature Exoplanets (THYME). 11. An Earth-sized planet orbiting a nearby Sun-like host in the 400 million Ursa Majoris migration group. A.J. 167, 54; doi: 10.3847/1538-3881/ad1039
Source: www.sci.news
