ISM Properties of a Massive Dusty Star-forming Galaxy Discovered at z ∼ 7

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

doi:10.3847/2041-8213/aa74b0

ISM Properties of a Massive Dusty Star-forming Galaxy Discovered at z ∼ 7

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

Authors

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. Hezaveh

K. 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

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 $z=6.900\pm 0.002$. 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 $[{\rm{C}}\,{\rm{I}}]$(2–1), and subsequently was confirmed by detections of CO(3–2) with the Australia Telescope Compact Array and $[{\rm{C}}\,{\rm{II}}]$ 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 $[{\rm{C}}\,{\rm{I}}]$ 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 ${M}_{\mathrm{gas}}=3.3\pm 1.9\times {10}^{11}\,{M}_{\odot }$. Its large mass and intense star formation is very rare for a source well into the epoch of reionization.

Citation

Strandet, M., Weiss, A., Breuck, C. D., Marrone, D., Vieira, J., Aravena, M., …Sreevani, J. (2017). ISM Properties of a Massive Dusty Star-forming Galaxy Discovered at z ∼ 7. Astrophysical Journal Letters, 842(2), Article L15. https://doi.org/10.3847/2041-8213/aa74b0

Journal Article Type	Article
Acceptance Date	May 19, 2017
Online Publication Date	Jun 15, 2017
Publication Date	Jun 15, 2017
Deposit Date	Mar 1, 2018
Publicly Available Date	Mar 1, 2018
Journal	Astrophysical Journal Letters
Print ISSN	2041-8205
Publisher	American Astronomical Society
Peer Reviewed	Peer Reviewed
Volume	842
Issue	2
Article Number	L15
DOI	https://doi.org/10.3847/2041-8213/aa74b0