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ASPECS map: HST stellar emission & ALMA dust emission

Capitalizing on the unparalleled sensitivity of the Atacama Large Millimeter/sub-millimeter Array (ALMA) the ASPECS data unveil reservoirs of molecular gas and dust (the so-called interstellar medium) in galaxies up to redshifts z~4, when the Universe was only 1/8th of today’s age. This interstellar medium constitutes the matter out of which stars form, and it is thus a prerequsite of the star formation process, and thus a key driver for galaxy evolution. The ASPECS data provide the most sensitive image of the sky at 1.2mm available to date, disclosing the emission of dust, which is heated up by the star formation.