The ISM in the z = 6.9 Interacting Galaxies of SPT0311-58

Katrina C. Litke; Daniel P. Marrone; Manuel Aravena; Melanie Archipley; Matthieu Béthermin; James Burgoyne; Jared Cathey; Scott C. Chapman; Anthony H. Gonzalez; Thomas R. Greve; Gayathri Gururajan; Christopher C. Hayward; Matthew A. Malkan; Kedar A. Phadke; Cassie A. Reuter; Kaja M. Rotermund; Justin S. Spilker; Antony A. Stark; Nikolaus Sulzenauer; Joaquin D. Vieira; David Vizgan; Axel Weiß

doi:10.3847/1538-4357/acc93a

The ISM in the z = 6.9 Interacting Galaxies of SPT0311-58

Katrina C. Litke, Daniel P. Marrone, Manuel Aravena, Melanie Archipley, Matthieu Béthermin, James Burgoyne, Jared Cathey, Scott C. Chapman, Anthony H. Gonzalez, Thomas R. Greve, Gayathri Gururajan, Christopher C. Hayward, Matthew A. Malkan, Kedar A. Phadke, Cassie A. Reuter, Kaja M. Rotermund, Justin S. Spilker, Antony A. Stark, Nikolaus Sulzenauer, Joaquin D. VieiraDavid Vizgan, Axel Weiß

Research output: Contribution to journal › Article › peer-review

Abstract

SPT0311-58, a system of two interacting galaxies in the Epoch of Reionization, exists in one of the rarest, most massive dark matter halos theoretically possible in that era. Studying the interstellar medium (ISM) in these galaxies can illuminate the process of galaxy formation in the early Universe. In this work, we explore the multiphase ISM in this system, using ALMA observations of the [C ii] 158, [O i] 146, [N ii] 122, and [O iii] 88 fine-structure lines and dust continuum. We find wide variations in line ratios between the eastern and western galaxies, as well as across the western galaxy. Continuum colors indicate that SPT0311-58 E has a higher ionization parameter ( log U ≈ − 2.8 ) than SPT0311-58 W ( log U ≈ − 3.1 ). The ratio of [O iii] 88-[N ii] 122 and the ionization parameter constraints combine to demonstrate near-solar metallicity in these objects just 800 Myr after the Big Bang.

Original language	English (US)
Article number	87
Journal	Astrophysical Journal
Volume	949
Issue number	2
DOIs	https://doi.org/10.3847/1538-4357/acc93a
State	Published - Jun 1 2023

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/1538-4357/acc93a

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Litke, K. C., Marrone, D. P., Aravena, M., Archipley, M., Béthermin, M., Burgoyne, J., Cathey, J., Chapman, S. C., Gonzalez, A. H., Greve, T. R., Gururajan, G., Hayward, C. C., Malkan, M. A., Phadke, K. A., Reuter, C. A., Rotermund, K. M., Spilker, J. S., Stark, A. A., Sulzenauer, N., ... Weiß, A. (2023). The ISM in the z = 6.9 Interacting Galaxies of SPT0311-58. Astrophysical Journal, 949(2), Article 87. https://doi.org/10.3847/1538-4357/acc93a

Litke, KC, Marrone, DP, Aravena, M, Archipley, M, Béthermin, M, Burgoyne, J, Cathey, J, Chapman, SC, Gonzalez, AH, Greve, TR, Gururajan, G, Hayward, CC, Malkan, MA, Phadke, KA, Reuter, CA, Rotermund, KM, Spilker, JS, Stark, AA, Sulzenauer, N, Vieira, JD, Vizgan, D & Weiß, A 2023, 'The ISM in the z = 6.9 Interacting Galaxies of SPT0311-58', Astrophysical Journal, vol. 949, no. 2, 87. https://doi.org/10.3847/1538-4357/acc93a

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abstract = "SPT0311-58, a system of two interacting galaxies in the Epoch of Reionization, exists in one of the rarest, most massive dark matter halos theoretically possible in that era. Studying the interstellar medium (ISM) in these galaxies can illuminate the process of galaxy formation in the early Universe. In this work, we explore the multiphase ISM in this system, using ALMA observations of the [C ii] 158, [O i] 146, [N ii] 122, and [O iii] 88 fine-structure lines and dust continuum. We find wide variations in line ratios between the eastern and western galaxies, as well as across the western galaxy. Continuum colors indicate that SPT0311-58 E has a higher ionization parameter ( log U ≈ − 2.8 ) than SPT0311-58 W ( log U ≈ − 3.1 ). The ratio of [O iii] 88-[N ii] 122 and the ionization parameter constraints combine to demonstrate near-solar metallicity in these objects just 800 Myr after the Big Bang.",

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doi = "10.3847/1538-4357/acc93a",

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T1 - The ISM in the z = 6.9 Interacting Galaxies of SPT0311-58

AU - Litke, Katrina C.

AU - Marrone, Daniel P.

AU - Aravena, Manuel

AU - Archipley, Melanie

AU - Béthermin, Matthieu

AU - Burgoyne, James

AU - Cathey, Jared

AU - Chapman, Scott C.

AU - Gonzalez, Anthony H.

AU - Greve, Thomas R.

AU - Gururajan, Gayathri

AU - Hayward, Christopher C.

AU - Malkan, Matthew A.

AU - Phadke, Kedar A.

AU - Reuter, Cassie A.

AU - Rotermund, Kaja M.

AU - Spilker, Justin S.

AU - Stark, Antony A.

AU - Sulzenauer, Nikolaus

AU - Vieira, Joaquin D.

AU - Vizgan, David

AU - Weiß, Axel

PY - 2023/6/1

Y1 - 2023/6/1

N2 - SPT0311-58, a system of two interacting galaxies in the Epoch of Reionization, exists in one of the rarest, most massive dark matter halos theoretically possible in that era. Studying the interstellar medium (ISM) in these galaxies can illuminate the process of galaxy formation in the early Universe. In this work, we explore the multiphase ISM in this system, using ALMA observations of the [C ii] 158, [O i] 146, [N ii] 122, and [O iii] 88 fine-structure lines and dust continuum. We find wide variations in line ratios between the eastern and western galaxies, as well as across the western galaxy. Continuum colors indicate that SPT0311-58 E has a higher ionization parameter ( log U ≈ − 2.8 ) than SPT0311-58 W ( log U ≈ − 3.1 ). The ratio of [O iii] 88-[N ii] 122 and the ionization parameter constraints combine to demonstrate near-solar metallicity in these objects just 800 Myr after the Big Bang.

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The ISM in the z = 6.9 Interacting Galaxies of SPT0311-58

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