Cunningham, D. J. M., Chapman, S. C., Aravena, M., De Breuck, C., Bethermin, M., Chen, Chian-Chou, Dong, Chenxing ORCID: 0000-0002-5823-0349, Gonzalez, A. H., Greve, T. R., Litke, K. C., Ma, J., Malkan, M., Marrone, D. P., Miller, T., Phadke, K. A., Reuter, C., Rotermund, K., Spilker, J. S., Stark, A. A., Strandet, M., Vieira, J. D. and Weiss, A. (2020). The [C II]/[N II] ratio in 3 < z < 6 sub-millimetre galaxies from the South Pole Telescope survey. Mon. Not. Roy. Astron. Soc., 494 (3). S. 4090 - 4098. OXFORD: OXFORD UNIV PRESS. ISSN 1365-2966

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Abstract

We present Atacama Compact Array and Atacama Pathfinder Experiment observations of the [N II] 205 mu m fine-structure line in 40 sub-millimetre galaxies lying at redshifts z = 3-6, drawn from the 2500 deg(2) South Pole Thlescope survey. This represents the largest uniformly selected sample of high-redshift [N II] 205 mu m measurements to date. 29 sources also have [C II] 158 mu m line observations allowing a characterization of the distribution of the [C II] to [N II] luminosity ratio for the first time at high redshift. The sample exhibits a median L[C II] /L [N II]) approximate to 11.0 and interquartile range of 5.0 -24.7. These ratios are similar to those observed in local (Ultra)luminous infrared galaxies (LIRGs), possibly indicating similarities in their interstellar medium. At the extremes, we find individual sub-millimetre galaxies with L[C II]/L [N II] low enough to suggest a smaller contribution from neutral gas than ionized gas to the [C II] flux and high enough to suggest strongly photon or X-ray region dominated flux. These results highlight a large range in this line luminosity ratio for sub-millimetre galaxies, which may be caused by variations in gas density, the relative abundances of carbon and nitrogen, ionization parameter, metallicity, and a variation in the fractional abundance of ionized and neutral interstellar medium.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Cunningham, D. J. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Chapman, S. C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Aravena, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
De Breuck, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bethermin, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Chen, Chian-ChouUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dong, ChenxingUNSPECIFIEDorcid.org/0000-0002-5823-0349UNSPECIFIED
Gonzalez, A. H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Greve, T. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Litke, K. C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ma, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Malkan, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Marrone, D. P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Miller, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Phadke, K. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Reuter, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rotermund, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Spilker, J. S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stark, A. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Strandet, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vieira, J. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Weiss, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-335157
DOI: 10.1093/mnras/staa820
Journal or Publication Title: Mon. Not. Roy. Astron. Soc.
Volume: 494
Number: 3
Page Range: S. 4090 - 4098
Date: 2020
Publisher: OXFORD UNIV PRESS
Place of Publication: OXFORD
ISSN: 1365-2966
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
STAR-FORMING GALAXIES; DEEP FIELD-SOUTH; REDSHIFT SURVEY; NUMBER COUNTS; BRIGHTMultiple languages
Astronomy & AstrophysicsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/33515

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