Exoplanet Ross 508 b has the lowest mass of four Earth masses and rotates on its host every 10.75 days at a distance of approximately 0.053 AU. From him.
An international team of astronomers has announced the discovery of a new super-Earth exoplanet orbiting a nearby M-dwarf star known as Ross 508. Write about this Phys.org.
It was noted that super-Earths are planets larger than Earth, but not exceeding the mass of Neptune. Although the term itself refers only to the mass of a planet, astronomers also use it to describe planets that are larger than Earth but smaller than the so-called mini-Neptunes.
Today, astronomers led by Hiroki Harakawa of the Subaru Telescope have discovered a new super-Earth class planet. Using the InfraRed Doppler (IRD) instrument on the 8.2-meter Subaru telescope, they measured the radial velocity (RV) of Ross 508, an M dwarf of spectral type M4.5, located about 36.5 light-years away.
“We showed that the dwarf M4.5 Ross 508 has a significant RV periodicity of 10.75 days, with possible aliases of 1.099 and 0.913 days. This periodicity has no analogue in photometry or stellar activity indicators, but it is consistent in a Keplerian orbit due to the new planet Ross 508 b, “the researchers explained.
Exoplanet Ross 508 b has the lowest mass of four Earth masses and rotates on its host every 10.75 days at a distance of approximately 0.053 AU. From him. According to astronomers, this indicates that the orbit-averaged insolation is approximately 1.4 times that of Earth, placing the planet on the inner edge of the habitable zone of Ross 508.
“Our findings show that near-infrared RV search could play a critical role in finding a low-mass planet around cool M dwarfs such as the Ross 508 using high-dispersions. spectrographs such as HPF, CARMENES and SPIROU, as well as exoplanet surveys using transit techniques from space (e.g., TESS) and from the ground (e.g., SPECULOOS), ”the researchers conclude.
Remember that astronomers found the oldest planet in the galaxy. He is assumed to be “the same age” of the universe.
The new giant exoplanet has been discovered
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Source: korrespondent
