«A magnetic field protects the atmosphere of a planet or moon, and the atmosphere protects the surface,» says study coauthor Sonia Tikoo, a planetary scientist at Rutgers University in New Brunswick, N.J. Together, the two protect
the potential habitability of the planet or moon, possibly those far beyond our solar system.
«We still have a lot to learn about
the potential habitability of these planets, but it would perhaps indicate that there may be planets similar to Earth orbiting our nearest stellar neighbors.»
The study does not address whether Proxima Centauri's activity cycle would affect
the potential habitability of the planet Proxima b. Theory suggests that flares or a stellar wind, both of which are driven by magnetic fields, could scour the planet and strip away any atmosphere.
Scientists showed
the potential habitability of the planet under different atmospheric conditions and orbits using a state - of - the - art model.
Not exact matches
One clue to
potential habitability is a
planet's mass — something not precisely nailed down in previous measurements
of the TRAPPIST - 1 worlds.
Since the bulk
of the stars in the Milky Way are red dwarfs, «one can not avoid studying them to understand
planet formation or to evaluate the
habitability potential of our galaxy,» HARPS researcher Xavier Bonfils, with France's Observatory
of Sciences
of the Universe
of Grenoble, wrote in an email to Discovery News.
Bottom line: All 7
of the TRAPPIST - 1
planets are Earth - sized and terrestrial, making them an ideal focus
of study for
planet formation and
potential habitability.
Their hope is to produce a library
of potential planetary climates in the Universe, which can then be used for research on
habitability and
planet detection.
Orbital variations are also likely to be a generic feature
of other
planets, with strong implications for the fate
of planetary atmospheres (for example, understanding the
potential for
habitability on other systems).