[extract of press releace, issued by the Institute d’Estudis Especials de Catalunya www.ieec.cat ]
Measurements from high-precision instruments reveal a cold super-Earth around Barnard’s star
An international team of astronomers led by Ignasi Ribas of the Institute of Space Studies of Catalonia (IEEC) and Institute of Space Sciences (ICE, CSIC) has found a candidate planet in orbit around Barnard’s star.
Barnard’s star is the closest single star to the Sun and second only to the Alpha Centauri triple stellar system.
The team used about 18 years of observations and combined them with new observations with the CARMENES planet-hunter spectrograph at Calar Alto/Spain and other facilities.
Astronomers obtained significant evidence of a planet with mass just over 3 times the Earth’s mass orbiting the red dwarf star every 233 days. This would place the super-Earth near the so-called snow-line of the star, where it is likely to be a frozen world.
This is the first time astronomers discover this kind of exoplanet using the radial velocity method .
The finding will be published in the journal Nature on 15 November 2018.
At only six light-years from us, Barnard’s star appears to move across Earth’s night sky faster than ...