Inami, Hanae ORCID: 0000-0003-4268-0393, Algera, Hiddo S. B., Schouws, Sander, Sommovigo, Laura, Bouwens, Rychard, Smit, Renske, Stefanon, Mauro, Bowler, Rebecca A. A., Endsley, Ryan ORCID: 0000-0003-4564-2771, Ferrara, Andrea, Oesch, Pascal, Stark, Daniel, Aravena, Manuel, Barrufet, Laia ORCID: 0000-0003-1641-6185, da Cunha, Elisabete ORCID: 0000-0001-9759-4797, Dayal, Pratika, De Looze, Ilse, Fudamoto, Yoshinobu, Gonzalez, Valentino, Graziani, Luca ORCID: 0000-0002-9231-1505, Hodge, Jacqueline A., Hygate, Alexander P. S., Nanayakkara, Themiya, Pallottini, Andrea ORCID: 0000-0002-7129-5761, Riechers, Dominik A., Schneider, Raffaella, Topping, Michael and van der Werf, Paul (2022). The ALMA REBELS Survey: dust continuum detections at z > 6.5. Mon. Not. Roy. Astron. Soc., 515 (3). S. 3126 - 3144. OXFORD: OXFORD UNIV PRESS. ISSN 1365-2966

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Abstract

We report 18 dust continuum detections (>= 3.3 sigma) at similar to 88 and 158 mu m out of 49 ultraviolet (UV)-bright galaxies (M-UV < -21.3 mag) at z > 6.5, observed by the Cycle-7 Atacama Large Millimeter/submillimeter Array (ALMA) Large Program, Reionization-Era Bright Emission Line Survey (REBELS) and its pilot programs. This has more than tripled the number of dust continuum detections known at z > 6.5. Out of these 18 detections, 12 are reported for the first time as part of REBELS. In addition, 15 of the dust continuum detected galaxies also show a [C II](158 mu m) emission line, providing us with accurate redshifts. We anticipate more line emission detections from six targets (including three continuum detected targets) where observations are still ongoing. We estimate that all of the sources have an infrared (IR) luminosity (L IR) in a range of 3-8 x10(11) L-circle dot. except for one with L-IR = 1.5(-0.5)(+0.8) x10(12) L-circle dot. Their fraction of obscured star formation is significant at greater than or similar to 50 per cent, despite being UV-selected galaxies. Some of the dust continuum detected galaxies show spatial offsets (similar to 0.5-1.5 arcsec) between the rest-UV and far-IR emission peaks. These separations could imply spatially decoupled phases of obscured and unobscured star formation, but a higher spatial resolution observation is required to confirm this. REBELS offers the best available statistical constraints on obscured star formation in UV-luminous galaxies at z > 6.5.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Inami, HanaeUNSPECIFIEDorcid.org/0000-0003-4268-0393UNSPECIFIED
Algera, Hiddo S. B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schouws, SanderUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sommovigo, LauraUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bouwens, RychardUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Smit, RenskeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stefanon, MauroUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bowler, Rebecca A. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Endsley, RyanUNSPECIFIEDorcid.org/0000-0003-4564-2771UNSPECIFIED
Ferrara, AndreaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Oesch, PascalUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stark, DanielUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Aravena, ManuelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Barrufet, LaiaUNSPECIFIEDorcid.org/0000-0003-1641-6185UNSPECIFIED
da Cunha, ElisabeteUNSPECIFIEDorcid.org/0000-0001-9759-4797UNSPECIFIED
Dayal, PratikaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
De Looze, IlseUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fudamoto, YoshinobuUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gonzalez, ValentinoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Graziani, LucaUNSPECIFIEDorcid.org/0000-0002-9231-1505UNSPECIFIED
Hodge, Jacqueline A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hygate, Alexander P. S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nanayakkara, ThemiyaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pallottini, AndreaUNSPECIFIEDorcid.org/0000-0002-7129-5761UNSPECIFIED
Riechers, Dominik A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schneider, RaffaellaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Topping, MichaelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
van der Werf, PaulUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-696940
DOI: 10.1093/mnras/stac1779
Journal or Publication Title: Mon. Not. Roy. Astron. Soc.
Volume: 515
Number: 3
Page Range: S. 3126 - 3144
Date: 2022
Publisher: OXFORD UNIV PRESS
Place of Publication: OXFORD
ISSN: 1365-2966
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
ULTRA DEEP FIELD; INFRARED LUMINOSITY FUNCTIONS; OBSCURED STAR-FORMATION; SPECTROSCOPIC SURVEY; O III; GALAXIES; EMISSION; REDSHIFT; HUBBLE; REIONIZATIONMultiple languages
Astronomy & AstrophysicsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/69694

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