Why Cold Stars Lead Scientists Astray ⚡ экспресс
Original: "Overestimated Pressure Broadening Misleads Model Spectra in Cool M Dwarf Stars"
Standard models of starlight don't work for ultracool dwarfs.
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The light of the cool star TRAPPIST-1 turned out to be deceptive: astronomers' standard models predicted strong signatures of iron and water in it, but telescopes barely see them. It's all about how molecules collide in the thin atmosphere — much more gently than in the Sun. Revising the rules of the game will help search for life more accurately on planets around such stars.
🎯 TRAPPIST-1 is so cool that its temperature is only about 2500°C — half as hot as the Sun. If it were in the Sun's place, Earth would receive less light than Pluto does now.