Spatially Resolved Water Emission from Gravitationally Lensed Dusty Star-forming Galaxies at z ∼ 3

Sreevani Jarugula*, Joaquin D. Vieira, Justin S. Spilker, Yordanka Apostolovski, Manuel Aravena, Matthieu Bethermin, Carlos de Breuck, Chian-Chou Chen, Daniel J. M. Cunningham, Chenxing Dong, Thomas Greve, Christopher C. Hayward, Yashar Hezaveh, Katrina C. Litke, Amelia C. Mangian, Desika Narayanan, Kedar Phadke, Cassie A. Reuter, Paul Van der Werf, Axel Weiss

*Corresponding author for this work

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Abstract

Water (H2O), one of the most ubiquitous molecules in the universe, has bright millimeter-wave emission lines that are easily observed at high redshift with the current generation of instruments. The low-excitation transition of H2O, (ν rest = 987.927 GHz), is known to trace the far-infrared (FIR) radiation field independent of the presence of active galactic nuclei (AGNs) over many orders of magnitude in FIR luminosity (). This indicates that this transition arises mainly due to star formation. In this paper, we present spatially (~05 corresponding to ~1 kiloparsec) and spectrally resolved (~100 kms−1) observations of in a sample of four strong gravitationally lensed high-redshift galaxies with the Atacama Large Millimeter/submillimeter Array. In addition to increasing the sample of luminous (>1012 L ) galaxies observed with H2O, this paper examines the relation on resolved scales for the first time at high redshift. We find that is correlated with on both global and resolved kiloparsec scales within the galaxy in starbursts and AGN with average . We find that the scatter in the observed relation does not obviously correlate with the effective temperature of the dust spectral energy distribution or the molecular gas surface density. This is a first step in developing as a resolved star formation rate calibrator.
Original languageEnglish
Article number92
JournalAstrophysical Journal Supplement Series
Volume880
Issue number2
Number of pages13
ISSN0067-0049
DOIs
Publication statusPublished - 2019

Keywords

  • Galaxies: high-redshift
  • Galaxies: ISM
  • Galaxies: starburst
  • ISM: molecules

Cite this

Jarugula, S., Vieira, J. D., Spilker, J. S., Apostolovski, Y., Aravena, M., Bethermin, M., de Breuck, C., Chen, C-C., Cunningham, D. J. M., Dong, C., Greve, T., Hayward, C. C., Hezaveh, Y., Litke, K. C., Mangian, A. C., Narayanan, D., Phadke, K., Reuter, C. A., Van der Werf, P., & Weiss, A. (2019). Spatially Resolved Water Emission from Gravitationally Lensed Dusty Star-forming Galaxies at z ∼ 3. Astrophysical Journal Supplement Series, 880(2), [92]. https://doi.org/10.3847/1538-4357/ab290d