Astronomers have made breakthroughs in studying the TRAPPIST-1 exoplanetary system, emphasizing the role of stellar contamination and exploring the potential atmospheres of TRAPPIST-1 b. Astronomers led by a team at Université de Montréal have made important progress in understanding the intrigui
, have fueled hopes of finding potentially habitable environments beyond our solar system.
— the moment when the planet passes in front of its star — using the Canadian-made NIRISS instrument aboard the JWST.“These are the very first spectroscopic observations of any TRAPPIST-1 planet obtained by the JWST, and we’ve been waiting for them for years,” said Lim, the GO program’s principal Investigator.
The astronomers’ key finding was just how significant stellar activity and contamination are when trying to determine the nature of an exoplanet. Stellar contamination refers to the influence of the star’s own features, such as dark spots and bright faculae, on the measurements of the exoplanet’s atmosphere.
This result underscores the importance of considering stellar contamination when planning future observations of all exoplanetary systems, the sceintists say. This is especially true for systems like TRAPPIST-1, since the system is centered around a red dwarf star which can be particularly active with starspots and frequent flare events.
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