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Deceptively cold dust in the massive starburst galaxy GN20 at <i>z</i> ∼ 4

Deceptively cold dust in the massive starburst galaxy GN20 at <i>z</i> ∼ 4

We present new observations, carried out with IRAM NOEMA, of the atomic neutral carbon transitions [C I ]( 3 P 1 – 3 P 0 ) at 492 GHz and [C I ]( 3 P 2 – 3 P 1 ) at 809 GHz of GN20, a well-studied star-bursting galaxy …