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But, lead researcher Teruyuki Hirano said in a news release, "in our simulations, the atmosphere and the composition of the planet were assumed to be Earth-like, and there's no guarantee that this is the case."
Unlike the solar-type star in Earth's solar system, habitable zones for red dwarf planets are typically much smaller and the planets orbiting the stars are much closer to the stars themselves, Tech Times reported.
This means that one side of the planet is “tidally locked” to the star, leading to potentially erratic storms that could deem the area unlivable.
To determine whether the planet truly is habitable, Hirano said more precise estimates of the radius and temperature of the K2-155 red dwarf star are necessary and would require further research.
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It’s important to note that the number of planets around red dwarfs is much smaller than the number around solar-type stars,” Hirano added. “Red dwarf systems, especially coolest red dwarfs, are just beginning to be investigated, so they are very exciting targets for future exoplanet research.”
But the team noted a key outcome of their findings is how similar planets orbiting red dwarf stars may be to planets orbiting solar-type stars. In fact, this is the first time that researchers have shown a similar radius gap in both groups.
“This is a unique finding, and many theoretical astronomers are now investigating what causes this gap,” Hirano said.
According to NASA's exoplanet archive, there are 2,342 Kepler confirmed planets as of March 13, 2018.
Read the full study at iopscience.iop.org.