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Reionization Era Bright Emission Line Survey: Selection and Characterization of Luminous Interstellar Medium Reservoirs in the z > 6.5 Universe

Bouwens, RJ, Smit, R, Schouws, S, Stefanon, M, Bowler, R, Endsley, R, Gonzalez, V, Inami, H, Stark, D, Oesch, P, Hodge, J, Aravena, M, Da Cunha, E, Dayal, P, Looze, ID, Ferrara, A, Fudamoto, Y, Graziani, L, Li, C, Nanayakkara, T , Pallottini, A, Schneider, R, Sommovigo, L, Topping, M, Van Der Werf, P, Algera, H, Barrufet, L, Hygate, A, Labbé, I, Riechers, D and Witstok, J (2022) Reionization Era Bright Emission Line Survey: Selection and Characterization of Luminous Interstellar Medium Reservoirs in the z > 6.5 Universe. Astrophysical Journal, 931 (2). p. 160. ISSN 0067-0049

Reionization era bright emission line survey selection and characterization of luminous interstellar medium reservoirs in the z 6.5 Universe.pdf - Published Version
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The Reionization Era Bright Emission Line Survey (REBELS) is a cycle-7 ALMA Large Program (LP) that is identifying and performing a first characterization of many of the most luminous star-forming galaxies known in the z > 6.5 universe. REBELS is providing this probe by systematically scanning 40 of the brightest UV-selected galaxies identified over a 7 deg2 area for bright [C ii]158 μm and [O iii]88 μm lines and dust-continuum emission. Selection of the 40 REBELS targets was done by combining our own and other photometric selections, each of which is subject to extensive vetting using three completely independent sets of photometry and template-fitting codes. Building on the observational strategy deployed in two pilot programs, we are increasing the number of massive interstellar medium (ISM) reservoirs known at z > 6.5 by ∼4-5× to >30. In this manuscript, we motivate the observational strategy deployed in the REBELS program and present initial results. Based on the first-year observations, 18 highly significant ≥ 7σ [C ii]158 μm lines have already been discovered, the bulk of which (13/18) also show ≥3.3σ dust-continuum emission. These newly discovered lines more than triple the number of bright ISM-cooling lines known in the z > 6.5 universe, such that the number of ALMA-derived redshifts at z > 6.5 rival Lyα discoveries. An analysis of the completeness of our search results versus star formation rate (SFR) suggests an ∼79% efficiency in scanning for [C ii]158 μm when the SFRUV+IR is >28 M yr-1. These new LP results further demonstrate ALMA's efficiency as a "redshift machine,"particularly in the Epoch of Reionization.

Item Type: Article
Uncontrolled Keywords: Astronomy & Astrophysics; 0201 Astronomical and Space Sciences; 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics; 0306 Physical Chemistry (incl. Structural)
Subjects: Q Science > QB Astronomy
Divisions: Astrophysics Research Institute
Publisher: American Astronomical Society
SWORD Depositor: A Symplectic
Date Deposited: 08 Nov 2022 09:59
Last Modified: 08 Nov 2022 10:00
DOI or ID number: 10.3847/1538-4357/ac5a4a
URI: https://researchonline.ljmu.ac.uk/id/eprint/18060
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