Harrington, Kevin C., Vishwas, A., Weiss, A., Magnelli, B., Grassitelli, L., Zajacek, M., Jimenez-Andrade, E. F., Leung, T. K. D., Bertoldi, F., Romano-Diaz, E., Frayer, D. T., Kamieneski, P., Riechers, D., Stacey, G. J., Yun, M. S. and Wang, Q. D. (2019). The 'Red Radio Ring': ionized and molecular gas in a starburst/active galactic nucleus at z similar to 2.55. Mon. Not. Roy. Astron. Soc., 488 (2). S. 1489 - 1501. OXFORD: OXFORD UNIV PRESS. ISSN 1365-2966

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Abstract

We report the detection of the far-infrared (FIR) fine-structure line of singly ionized nitrogen, [N II] 205 mu m, within the peak epoch of galaxy assembly, from a strongly lensed galaxy, hereafter 'The Red Radio Ring'; the RRR, at z = 2.55. We combine new observations of the ground-state and mid-J transitions of CO (J(up) = 1, 5, 8), and the FIR spectral energy distribution (SED), to explore the multiphase interstellar medium (ISM) properties of the RRR. All line profiles suggest that the H II regions, traced by [N II] 205 mu m, and the (diffuse and dense) molecular gas, traced by CO, are cospatial when averaged over kpc-sized regions. Using its mid-IR-to-millimetre (mm) SED, we derive a non-negligible dust attenuation of the [N II] 205 mu m line emission. Assuming a uniform dust screen approximation results a mean molecular gas column density >10(24) cm(-2), with a molecular gas-to-dust mass ratio of 100. It is clear that dust attenuation corrections should be accounted for when studying FIR fine-structure lines in such systems. The attenuation corrected ratio of L-NII205/LIR(8-1000 (mu m)) = 2.7 x 10(-4) is consistent with the dispersion of local and z > 4 SFGs. We find that the lower limit, [N II] 205 mu m-based star formation rate (SFR) is less than the IR-derived SFR by a factor of 4. Finally, the dust SED, CO line SED, and L-NII205 line-to-IR luminosity ratio of the RRR is consistent with a starburst-powered ISM.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Harrington, Kevin C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vishwas, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Weiss, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Magnelli, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Grassitelli, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zajacek, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jimenez-Andrade, E. F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Leung, T. K. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bertoldi, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Romano-Diaz, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Frayer, D. T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kamieneski, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Riechers, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stacey, G. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yun, M. S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wang, Q. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-143417
DOI: 10.1093/mnras/stz1740
Journal or Publication Title: Mon. Not. Roy. Astron. Soc.
Volume: 488
Number: 2
Page Range: S. 1489 - 1501
Date: 2019
Publisher: OXFORD UNIV PRESS
Place of Publication: OXFORD
ISSN: 1365-2966
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
OBSCURED STAR-FORMATION; PHYSICAL CONDITIONS; MU-M; HIGH-REDSHIFT; 1ST DETECTION; MILKY-WAY; GALAXY; EMISSION; AGN; LINEMultiple languages
Astronomy & AstrophysicsMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/14341

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