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A Resolved Starburst Merger and an Unresolved Dust Problem

19 Mar 2021, 14:00 UTC
A Resolved Starburst Merger and an Unresolved Dust Problem
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Title: Resolving a dusty, star-forming SHiZELS galaxy at z = 2.2 with HST, ALMA and SINFONI on kiloparsec scalesAuthors: R. K. Cochrane, P. N. Best, I. Smail, E. Ibar, C. Cheng, A. M. Swinbank, J. Molina, D. Sobral, U. DudzevičiūtėFirst Author’s Institution: Harvard-Smithsonian Center for Astrophysics, USA & SUPA, Institute for Astronomy, Royal Observatory EdinburghStatus: Published in Monthly Notices of the Royal Astronomical Society [closed access]Most of the Universe’s star formation is hidden behind a smokescreen of dust, which absorbs and re-emits short wavelength light from hot, young stars to longer wavelengths. One extreme type of galaxy, dusty star-forming galaxies (DSFGs), is responsible for a significant portion of total cosmic star formation. DSFGs have some of the highest rates of star formation, in the 100s – 1000s M☉/year compared to our own Milky Way Galaxy, which forms stars at a moderate 1-2 M☉/year. How these huge bursts of star formation are fueled remains somewhat fuzzy. It’s challenging to discern detailed physical processes when all you have to look at is an unresolved blob of dust very far away. Like a TV show crime scene investigator going “sharpen!” and magically finding the clue in what once was a blurry image, to ...

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