Submillimeter Detections of Sloan Digital Sky Survey (SDSS) Quasars in the ALMA Footprint

Published: 03 Jul 2023
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ALMA has been observing for more than 10 years now, producing science data with an average rate of 1TB per day. This data is available in the ALMA Science Archive (ASA), an unparalleled resource for original research. Given the growing potential of the ASA, the European ARC network launched the High-Level Data Products initiative, with the aim to develop science-ready data products derived from already published datasets and go beyond the formal ALMA deliverable. As a first instance of this initiative, Wong et al. 2023 present a catalogue of 376 unique submillimeter detections of quasars from the Sloan Digital Sky Survey (SDSS) Data Release 14 in the ALMA footprint. The detections, at or above 3.5σ, were extracted from all ALMA data in the ASA that were outside their proprietary time by 1 November 2022. The applied workflow is automated and repeatable. In the same work, all lensed, jetted and SDSS quasars with multiple submillimeter counterparts in the ALMA footprint are provided, as well as a catalogue of all the SDSS quasars in the same area of the sky with no reliable detections above 3.5σ.

The obtained integrated fluxes are a first step towards better constrained quasar submillimeter SEDs, leading to a better understanding of the physical processes behind the concomitant star formation and the accretion onto supermassive black holes in optically- and submillimeter-bright quasars.