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Large surveys of dusty galaxies at high redshift with AtLAST

Abstract : Nowadays, most of the constraints on the dusty star formation at high z comes from deep continuum surveys. We developed a new simulation of the dusty extragalactic sky with a realistic clustering. The comparison between single-dish and interferometric data showed that the clustering inside the beam of a single-dish instrument can seriously bias their measurements. Fortunately, these simulations also show that the beam of a >30-meter dish in the mm should not be affected by serious multiplicity effects. We will give predictions for important characteristics of future AtLAST surveys (as confusion limit, number of detections, properties of detected galaxies). These simulations can also include line emission to prepare a future sub-mm low-resolution spectroscopic survey at high z with AtLAST. Such a survey could be built on the legacy of the CONCERTO survey, that will map the fluctuations of the CII line intensity in the reionisation and post-reionisation epoch. A "super-CONCERTO" instrument on AtLAST would be a perfect first-light instrument to unveil the gigantic potential of this telescope.
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Submitted on : Monday, August 26, 2019 - 3:07:41 PM
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Guilaine Lagache, Matthieu Bethermin. Large surveys of dusty galaxies at high redshift with AtLAST. Atacama Large-Aperture Submm/mm Telescope (AtLAST), European Southern Observatory, Jan 2018, Garching, Germany. ⟨10.5281/zenodo.1159045⟩. ⟨hal-02271064⟩



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