have you ever felt like something was missing? well, imagine feeling that way about half the universe! that's right, until recently, half of the ordinary baryonic matter in the universe was nowhere to be found. but thanks to fast radio bursts, we've finally cracked the case of the missing baryons. π΅οΈββοΈπ
the missing baryon problem
we've all heard of dark matter and dark energy, which make up 27% and 68% of the universe, respectively. but what about the normal, ordinary matter that makes up you, me, and everything we can see? it turns out that we expected the universe to be made up of 5% baryonic matter, but when we looked, we only found 2.5%. this became known as the missing baryon problem. π€π
the clue: fast radio bursts
enter fast radio bursts (frbs), mysterious and powerful signals from deep space that last only a few milliseconds. these bursts have been a puzzle for astronomers since their discovery in 2007. but now, they've become the key to solving the missing baryon problem. ππ‘
the solution: whim
researchers have found that frbs can be used to detect the warm-hot intergalactic medium (whim), a diffuse, ionized gas that fills the space between galaxies. this gas is made up of the missing baryons we've been searching for! by analyzing the frbs, scientists have been able to map the distribution of the whim and confirm that it contains the missing baryonic matter. πβ¨
the big bang and baryon formation
but why should we expect the universe to be 5% ordinary baryonic matter in the first place? the answer lies in the big bang and the formation of elements. in the beginning, the universe was radiation-dominated, with neutrons and protons whizzing around. as the universe expanded and cooled, protons and neutrons could fuse together to form stable nuclei like helium-4. the rate at which this happened determined the relative abundances of different elements we observe today. π π₯
the future of the missing baryon problem
now that we've found the missing baryons, what's next? researchers will continue to study the whim and frbs to better understand the distribution of baryonic matter in the universe. this will help us piece together the cosmic puzzle and shed light on the mysteries of the universe. ππ
conclusion
the missing baryon problem has been a cosmic mystery for decades, but thanks to fast radio bursts and the warm-hot intergalactic medium, we've finally found the missing half of the universe. it's a reminder that even the biggest mysteries can be solved with a little bit of detective work and a lot of scientific curiosity. π΅οΈββοΈπ
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