Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 854, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.3847/2041-8213/aaab45
Keywords
galaxies: evolution; galaxies: formation; galaxies: high-redshift; infrared: ISM
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Funding
- Science and Technology Facilities Council (STFC)
- ERC [695671]
- STFC [ST/M001172/1] Funding Source: UKRI
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Himiko is one of the most luminous Ly alpha emitters at z = 6.595. It has three star-forming clumps detected in the rest-frame UV, with a total SFR = 20 M-circle dot yr(-1). We report the Atacama Large Millimeter/submillimeter Array (ALMA) detection of the [C II] 158 mu m line emission in this Galaxy with a significance of 8 sigma. The total [C II] luminosity (L-[C II] = 1.2 x 10(8) L-circle dot) is fully consistent with the local L-[C II]-SFR relation. The ALMA high-angular resolution reveals that the [C II] emission is made of two distinct components. The brightest [C II] clump is extended over 4. kpc and is located on the peak of the Lya nebula, which is spatially offset by 1 kpc relative to the brightest UV clump. The second [C II] component is spatially unresolved (size <2 kpc) and coincident with one of the three UV clumps. While the latter component is consistent with the local L-[C II]-SFR relation, the other components are scattered above and below the local relation. We shortly discuss the possible origin of the [C II] components and their relation with the star-forming clumps traced by the UV emission.
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