Strandet, ML;
Weiss, A;
Breuck, CD;
Marrone, DP;
Vieira, JD;
Aravena, M;
Ashby, MLN;
... Sreevani, J; + view all
(2017)
ISM Properties of a Massive Dusty Star-forming Galaxy Discovered at z ∼ 7.
The Astrophysical Journal Letters
, 842
(2)
10.3847/2041-8213/aa74b0.
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Abstract
We report the discovery and constrain the physical conditions of the interstellar medium of the highest-redshift millimeter-selected dusty star-forming galaxy 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 Atacama Large Millimeter/submillimeter Array 3 mm frequency scan that detected CO(6-5), CO(7-6), and [C I](2-1), and subsequently was confirmed by detections of CO(3-2) with the Australia Telescope Compact Array 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 M gas 3.3±1.9×10 1 1 M. Its large mass and intense star formation is very rare for a source well into the epoch of reionization.
| Type: | Article |
|---|---|
| Title: | ISM Properties of a Massive Dusty Star-forming Galaxy Discovered at z ∼ 7 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3847/2041-8213/aa74b0 |
| Publisher version: | http://doi.org/10.3847/2041-8213/aa74b0 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | early universe, galaxies: high-redshift, galaxies: star formation |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10038470 |
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