ISM PROPERTIES OF A MASSIVE DUSTY STAR-FORMING GALAXY DISCOVERED AT Z ∼ 7

M. L. Strandet, A. Weiß, C. de Breuck, D. P. Marrone, J. D. Vieira, M. Aravena, M. L.N. Ashby, M. Béthermin, M. S. Bothwell, C. M. Bradford, J. E. Carlstrom, S. C. Chapman, D. J.M. Cunningham, Chian Chou Chen, C. D. Fassnacht, A. H. Gonzalez, T. R. Greve, B. Gullberg, C. C. Hayward, Y. HezavehK. Litke, J. Ma, M. Malkan, K. M. Menten, T. Miller, E. J. Murphy, D. Narayanan, K. A. Phadke, K. M. Rotermund, J. S. Spilker, J. Sreevani

Research output: Contribution to journalArticlepeer-review

Abstract

We report the discovery and constrain the physical conditions of the interstellar medium of the highest-redshift millimeter-selected dusty star-forming galaxy (DSFG) to date, SPT-S J031132−5823.4 (hereafter SPT0311−58), at z = 6.900 ± 0.002. SPT0311−58 was discovered via its 1.4 mm thermal dust continuum emission in the South Pole Telescope (SPT)-SZ survey. The spectroscopic redshift was determined through an ALMA 3 mm frequency scan that detected CO(6–5), CO(7–6) and [C I](2–1), and subsequently confirmed by detections of CO(3–2) with ATCA and [C II] with APEX. We constrain the properties of the ISM in SPT0311−58 with a radiative transfer analysis of the dust continuum photometry and the CO and [C I] line emission. This allows us to determine the gas content without ad hoc assumptions about gas mass scaling factors. SPT0311−58 is extremely massive, with an intrinsic gas mass of Mgas = 3.3 ± 1.9 × 1011 M4544. Its large mass and intense star formation is very rare for a source well into the Epoch of Reionization.

Original languageEnglish (US)
JournalUnknown Journal
StatePublished - May 22 2017

Keywords

  • 1. INTRODUCTION
  • Galaxies
  • High-redshift — galaxies
  • Star formation — early universe

ASJC Scopus subject areas

  • General

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