Universität zu Köln

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:	Creators Email ORCID ORCID Put Code Cunningham, D. J. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chapman, S. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Aravena, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED De Breuck, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bethermin, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chen, Chian-Chou UNSPECIFIED UNSPECIFIED UNSPECIFIED Dong, Chenxing UNSPECIFIED orcid.org/0000-0002-5823-0349 UNSPECIFIED Gonzalez, A. H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Greve, T. R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Litke, K. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ma, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Malkan, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Marrone, D. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Miller, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Phadke, K. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Reuter, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rotermund, K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Spilker, J. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stark, A. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Strandet, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Vieira, J. D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Weiss, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
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:	Keywords Language STAR-FORMING GALAXIES; DEEP FIELD-SOUTH; REDSHIFT SURVEY; NUMBER COUNTS; BRIGHT Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/33515