Michele Fumagalli — research highlightsShort, plain-language notes on recent papers and results.https://www.michelefumagalli.com/enA direct picture of the cosmic web, caught between two quasarshttps://www.michelefumagalli.com/highlights/cosmic-web-filament/https://www.michelefumagalli.com/highlights/cosmic-web-filament/142 hours with MUSE reveal a 700-kiloparsec filament of glowing hydrogen linking two quasars at z ≈ 3.22 — the structure cold dark matter has always predicted, imaged in enough detail to measure.Tue, 01 Apr 2025 00:00:00 GMTcosmic webMUDFMUSEIGMThe cosmic web glows even where there is no quasar to light ithttps://www.michelefumagalli.com/highlights/cosmic-web-without-quasars/https://www.michelefumagalli.com/highlights/cosmic-web-without-quasars/A five-megaparsec stretch of filament at z ≈ 4, threaded through nineteen ordinary galaxies and no quasars at all — which says the glow is set by the gas itself, not by whatever happens to be shining on it.Sat, 01 Feb 2025 00:00:00 GMTcosmic webMUDFMUSEIGMLAEsThe gas around a young galaxy sorts itself into three zoneshttps://www.michelefumagalli.com/highlights/metals-far-from-galaxies/https://www.michelefumagalli.com/highlights/metals-far-from-galaxies/Matching hundreds of metal absorbers against the galaxies near them, across the MAGG survey, resolves into a three-part picture: a galaxy's own halo, the filaments running between galaxies, and a thin enriched medium far from anything.Fri, 01 Sep 2023 00:00:00 GMTCGMIGMmetalsMAGGMUSEOrdinary galaxies wear their metals farther out than their starlighthttps://www.michelefumagalli.com/highlights/metals-around-ordinary-galaxies/https://www.michelefumagalli.com/highlights/metals-around-ordinary-galaxies/Stacking six hundred everyday galaxies from two MUSE surveys reveals magnesium and oxygen glowing well beyond where the stars stop — the first average measurement of metal emission around a normal galaxy population at z ≈ 1.Thu, 01 Jun 2023 00:00:00 GMTCGMmetalsMAGGMUDFMUSE