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

• Published in: The Astrophysical Journal
• Main Authors: Strandet, M. L., L, Weiss, A., de Breuck, C., Marrone, D. P., Vieira, J. D., Aravena, M., Ashby, M. L. N., Bethermin, M., Bothwell, M. S., S, Bradford, C. M., M, Carlstrom, J. E., E, Chapman, S. C., C, Cunningham, D. J. M., J M, Chen, Chian-Chou, Fassnacht, C. D., D, Gonzalez, A. H., H, Greve, T. R., R, Gullberg, B., Hayward, C. C., C, Hezaveh, Y., Litke, K., Ma, J., Malkan, M., Menten, K. M., M, Miller, T., Murphy, E. J., J, Narayanan, D., Phadke, K. A., A, Rotermund, K. M., M, Spilker, J. S., S, Sreevani, J.
• Other Authors: Institut d'Astrophysique de Paris (IAP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Antarctic Research a European Network for Astrophysics (ARENA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), California Institute of Technology (CALTECH), Harvard-Smithsonian Center for Astrophysics (CfA), Harvard University-Smithsonian Institution, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS), Centre for Fusion Space and Astrophysics Coventry (CFSA), University of Warwick Coventry, AUTRES, Niels Bohr Institute Copenhagen (NBI), Faculty of Science Copenhagen, University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH), Millimeter and Submillimeter Astronomy, Max-Planck-Institut für Radioastronomie (MPIFR)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2017
• Subjects: [SDU.ASTR.GA]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Galactic Astrophysics [astro-ph.GA]; [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]; South Pole; South pole
• Online Access: https://hal.science/hal-01789187; https://hal.science/hal-01789187/document; https://hal.science/hal-01789187/file/Strandet.pdf; https://doi.org/10.3847/2041-8213/aa74b0

Accepted by ApJL, Fixed compilation problem in v.2 International audience 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 M gas = 3.3 ± 1.9 × 10 11 M. Its large mass and intense star formation is very rare for a source well into the Epoch of Reionization.