2023-06-12 22:20:00
A second planet has been discovered around a binary exoplanet where two suns rise, like the planet Tatooine, where the main character Luke lived in the movie ‘Star Wars’. This is the second time that a multiplanetary circumbinary system with two or more exoplanets has been identified.
On the 13th, Dr. Matthew Standing’s team at the University of Birmingham, UK (currently the Open University of England) discovered the second planet (BEBOP-1c) in the binary exoplanet system ‘BEBOP-1/TOI-1388’ discovered in 2020 in ‘Nature Astronomy’. said to have found
A binary exoplanet system is a system of planets in which exoplanets orbit around two central stars that rotate around each other, resulting in two suns, like the planet Tatooine in Star Wars.
In the binary system BEBOP-1/TOI-1388, where the second planet was discovered, in 2020, NASA’s space telescope specializing in exoplanet observation, ‘TESS’, observed ‘passing the celestial surface’ (transit) method to ‘exoplanet’ BEBOP-1b/TOI-1338b’ has been discovered.
The celestial plane pass method is a way to find a planet by capturing the decrease in starlight when an exoplanet passes in front of a star. “The plane-through method allowed us to measure TOI-1338b’s size, but not its mass,” Standing said.
After the discovery of the first exoplanet, the research team has been observing this binary system using the ‘radial-velocity method’ using state-of-the-art equipment mounted on an astronomical telescope in the Atacama Desert, Chile.
The radial velocity method measures the speed at which a celestial object approaches or moves away from the direction of the observer’s gaze, and is also called the ‘Doppler method’.
The purpose of the radial velocity method observation was originally to measure the mass of the BEBOP-1b planet, but the research team found another planet called ‘BEBOP-1c’ instead of measuring the mass.
As a result of the observation, BEBOP-1c planet has an orbital period of 215 days and has been analyzed to have a mass 65 times that of Earth and 1/5 that of Jupiter.
The research team plans to measure the mass of the first BEBOP-1b planet and the size of the newly discovered BEBOP-1c planet through additional observations.
With this discovery, the research team confirmed two exoplanets in the TOI-1338/BEBOP-1 binary system, but said that there is a possibility that additional planets may be discovered in future observations.
“There are only 12 binary exoplanets discovered so far, and this is the second time that it has been confirmed to have two or more exoplanets,” said David Martin, a professor at Ohio State University in the United States.
“It is known that planets form from disks of matter around young stars,” said Dr. Lalita Sairam, second author of the paper. It’s important to expand,” he said.
Science Team [email protected]
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