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

R. J. Bouwens, R. Smit, S. Schouws, M. Stefanon, R. Bowler, R. Endsley, V. Gonzalez, H. Inami, D. Stark, P. Oesch, J. Hodge, M. Aravena, E. Da Cunha, P. Dayal, I. De Looze, A. Ferrara, Y. Fudamoto, L. Graziani, C. Li, T. NanayakkaraA. Pallottini, R. Schneider, L. Sommovigo, M. Topping, P. Van Der Werf, H. Algera, L. Barrufet, A. Hygate, I. Labbé, D. Riechers, J. Witstok

研究成果: Article査読

25 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号160
ジャーナルAstrophysical Journal
931
2
DOI
出版ステータスPublished - 2022 6月 1

ASJC Scopus subject areas

  • 天文学と天体物理学
  • 宇宙惑星科学

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