Earth-like planet may be lurking in nearby star system : Study


New York, Aug 18: Scientists, including one of Indian-origin on Friday predicted about the existence an Earth-like planet in a star system just 16 light years away.

A team of scientists revealed that the star system Gliese 832 for additional exoplanets residing between the two currently known alien worlds in the space.

As per their calculative investigation an additional Earth-like planet may be luring at a distance ranging from 0.25 to 2.0 astronomical unit (AU) from the star, a study published in The Astrophysical Journal said.

“According to our calculations, this hypothetical alien world would probably have a mass between 1 to 15 Earth’s masses,” stated study lead author Suman Satyal from University of Texas at Arlington in the US.

“This is an important breakthrough demonstrating the possible existence of a potential new planet orbiting a star close to our own,” University of Texas at Arlington Physics Chair Alexander Weiss said.

As per the study, Gliese 832 is a red dwarf and has just under half the mass and radius of our Sun.

The star is orbited by a big Jupiter-like exoplanet designated Gliese 832b and by a super-Earth planet Gliese 832c.

The gas giant with 0.64 Jupiter masses is orbiting around the dwarf star at a distance of 3.53 AU, while the other planet is potentially a rocky world, around five times bigger than the Earth, residing very close its host star – around 0.16 AU.

For this research, the team examined the simulated data with an injected Earth-mass planet on this nearby planetary system in a hope to discover a stable orbital configuration for the planet.

“The existence of this possible planet is supported by long-term orbital stability of the system, orbital dynamics and the synthetic radial velocity signal analysis,” Satyal further said.

“At the same time, a significantly large number of radial velocity observations, transit method studies, as well as direct imaging are still needed to confirm the presence of possible new planets in the Gliese 832 system,” he added.

Wefornews  Bureau

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