An Earth-like planet found near a star adjacent to the Sun

An Earth-like planet found near a star adjacent to the Sun

Earth-like planet found in neighboring star

Photo : pixabay.comAn Earth-like planet found near a star adjacent to the Sun

Exoplanet Ross 508 b has a minimum mass of four Earth masses and revolves around its host every 10.75 days at a distance of about 0.053 AU. from him.

An international team of astronomers announced the discovery of a new exoplanet-super-Earth orbiting a nearby M-dwarf star known as Ross 508. Writes about it Phys.org.

It is noted that the super-Earths — these are planets more massive than the Earth, but not exceeding the mass of Neptune. Although the term itself only refers to the mass of the planet, it is also used by astronomers to describe planets larger than Earth but smaller than the so-called mini-Neptunes.

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Now, 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 have shown 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 indicators of stellar activity, but corresponds well to the Keplerian orbit due to the new planet Ross 508 b», — the researchers explained.

Exoplanet Ross 508 b has a minimum mass of four Earth masses and orbits its host every 10.75 days at a distance of about 0.053 AU. From him. According to astronomers, this indicates that the orbit-averaged insolation is about 1.4 times Earth's, placing the planet at the inner edge of Ross 508's habitable zone.

«Our discovery demonstrates that that near-infrared RV searches could play a critical role in finding a low-mass planet around cool M dwarfs like Ross 508 using high-dispersion spectrographs like HPF, CARMENES and SPIROU, as well as exoplanet surveys using space-based transit techniques (e.g. TESS) and from the ground (e.g. SPECULOOS)», — the researchers concluded.