HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

[C II] emission in z similar to 6 strongly lensed, star-forming galaxies

Abstract : The far-infrared fine-structure line [C II] at 1900.5 GHz is known to be one of the brightest cooling lines in local galaxies, and therefore it has been suggested to be an efficient tracer for star formation in very high redshift galaxies. However, recent results for galaxies at z \textgreater 6 have yielded numerous non-detections in star-forming galaxies, except for quasars and submillimetre galaxies. We report the results of ALMA observations of two lensed, star-forming galaxies at z = 6.029 and z = 6.703. The galaxy A383-5.1 (star formation rate [SFR] of 3.2 M-circle dot yr(-1) and magnification of mu = 11.4 +/- 1.9) shows a line detection with L-[C II] = 8.9 x 10(6) L-circle dot, making it the lowest L-[C II] detection at z \textgreater 6. For MS0451-H (SFR = 0.4 M-circle dot yr(-1) and mu = 100 +/- 20) we provide an upper limit of L-[C II] \textless 3 x 10(5) L-circle dot, which is 1 dex below the local SFR-L-[C II] relations. The results are consistent with predictions for low-metallicity galaxies at z \textgreater 6; however, other effects could also play a role in terms of decreasing L-[CII]. The detection of A383-5.1 is encouraging and suggests that detections are possible, but much fainter than initially predicted.
Complete list of metadata

Contributor : Christian Surace Connect in order to contact the contributor
Submitted on : Friday, January 14, 2022 - 7:49:36 AM
Last modification on : Friday, January 14, 2022 - 7:49:38 AM
Long-term archiving on: : Friday, April 15, 2022 - 6:17:09 PM


Publisher files allowed on an open archive


Distributed under a Creative Commons Attribution 4.0 International License



Kirsten K. Knudsen, Johan Richard, Jean-Paul Kneib, Mathilde Jauzac, Benjamin Clément, et al.. [C II] emission in z similar to 6 strongly lensed, star-forming galaxies. Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P - Oxford Open Option A, 2016, 462 (1), pp.L6--L10. ⟨10.1093/mnrasl/slw114⟩. ⟨hal-01440696⟩



Record views


Files downloads