Star Formation and AGN Activity 500 Myr after the Big Bang: Insights from JWST

Jordan C.J. D’Silva; Simon P. Driver; Claudia D.P. Lagos; Aaron S.G. Robotham; Jake Summers; Rogier A. Windhorst

doi:10.3847/2041-8213/ad103e

Star Formation and AGN Activity 500 Myr after the Big Bang: Insights from JWST

Jordan C.J. D’Silva, Simon P. Driver, Claudia D.P. Lagos, Aaron S.G. Robotham, Jake Summers, Rogier A. Windhorst

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

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Abstract

We consider the effect of including an active galactic nuclei (AGN) component when fitting spectral energy distributions of 109 spectroscopically confirmed z ≈ 3.5-12.5 galaxies with JWST. Remarkably, we find that the resulting cosmic star formation history is ≈0.4 dex lower at z ≳ 9.5 when an AGN component is included in the fitting. This alleviates previously reported excess star formation at z ≳ 9.5 compared to models based on typical baryon conversion efficiencies inside dark matter halos. We find that the individual stellar masses and star formation rates can be as much as ≈4 dex lower when fitting with an AGN component. These results highlight the importance of considering both stellar mass assembly and supermassive black hole growth when interpreting the light distributions of among the first galaxies to ever exist.

Original language	English
Article number	L18
Number of pages	11
Journal	Astrophysical Journal Letters
Volume	959
Issue number	2
DOIs	https://doi.org/10.3847/2041-8213/ad103e
Publication status	Published - 1 Dec 2023

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10.3847/2041-8213/ad103eLicence: CC BY

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title = "Star Formation and AGN Activity 500 Myr after the Big Bang: Insights from JWST",

abstract = "We consider the effect of including an active galactic nuclei (AGN) component when fitting spectral energy distributions of 109 spectroscopically confirmed z ≈ 3.5-12.5 galaxies with JWST. Remarkably, we find that the resulting cosmic star formation history is ≈0.4 dex lower at z ≳ 9.5 when an AGN component is included in the fitting. This alleviates previously reported excess star formation at z ≳ 9.5 compared to models based on typical baryon conversion efficiencies inside dark matter halos. We find that the individual stellar masses and star formation rates can be as much as ≈4 dex lower when fitting with an AGN component. These results highlight the importance of considering both stellar mass assembly and supermassive black hole growth when interpreting the light distributions of among the first galaxies to ever exist.",

author = "D{\textquoteright}Silva, {Jordan C.J.} and Driver, {Simon P.} and Lagos, {Claudia D.P.} and Robotham, {Aaron S.G.} and Jake Summers and Windhorst, {Rogier A.}",

note = "Funding Information: We thank the anonymous referee/s for reviewing and improving the quality of this work. J.C.J.D. is supported by the Australian Government Research Training Program (RTP) Scholarship. S.P.D. acknowledges funding by the Australian Research Council (ARC) Laureate Fellowship scheme (FL220100191). A.S.G.R. acknowledges funding by the Australian Research Council (ARC) Future Fellowship scheme (FT200100375). This research was supported by the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), through project number CE170100013. This work is based on observations made with the NASA/ESA Hubble Space Telescope (HST) and NASA/ESA/CSA James Webb Space Telescope (JWST) obtained from the Mikulski Archive for Space Telescopes (MAST) at the Space Telescope Science Institute (STScI), which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-03127 for JWST, and NAS 526555 for HST. The observations used in this work are associated with JWST programs 1345 and 1324. We acknowledge all those involved in the development of the JWST and the execution of these large observing programs. Publisher Copyright: {\textcopyright} 2023. The Author(s). Published by the American Astronomical Society.",

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doi = "10.3847/2041-8213/ad103e",

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AU - D’Silva, Jordan C.J.

AU - Driver, Simon P.

AU - Lagos, Claudia D.P.

AU - Robotham, Aaron S.G.

AU - Summers, Jake

AU - Windhorst, Rogier A.

N1 - Funding Information: We thank the anonymous referee/s for reviewing and improving the quality of this work. J.C.J.D. is supported by the Australian Government Research Training Program (RTP) Scholarship. S.P.D. acknowledges funding by the Australian Research Council (ARC) Laureate Fellowship scheme (FL220100191). A.S.G.R. acknowledges funding by the Australian Research Council (ARC) Future Fellowship scheme (FT200100375). This research was supported by the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), through project number CE170100013. This work is based on observations made with the NASA/ESA Hubble Space Telescope (HST) and NASA/ESA/CSA James Webb Space Telescope (JWST) obtained from the Mikulski Archive for Space Telescopes (MAST) at the Space Telescope Science Institute (STScI), which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-03127 for JWST, and NAS 526555 for HST. The observations used in this work are associated with JWST programs 1345 and 1324. We acknowledge all those involved in the development of the JWST and the execution of these large observing programs. Publisher Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

PY - 2023/12/1

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N2 - We consider the effect of including an active galactic nuclei (AGN) component when fitting spectral energy distributions of 109 spectroscopically confirmed z ≈ 3.5-12.5 galaxies with JWST. Remarkably, we find that the resulting cosmic star formation history is ≈0.4 dex lower at z ≳ 9.5 when an AGN component is included in the fitting. This alleviates previously reported excess star formation at z ≳ 9.5 compared to models based on typical baryon conversion efficiencies inside dark matter halos. We find that the individual stellar masses and star formation rates can be as much as ≈4 dex lower when fitting with an AGN component. These results highlight the importance of considering both stellar mass assembly and supermassive black hole growth when interpreting the light distributions of among the first galaxies to ever exist.

AB - We consider the effect of including an active galactic nuclei (AGN) component when fitting spectral energy distributions of 109 spectroscopically confirmed z ≈ 3.5-12.5 galaxies with JWST. Remarkably, we find that the resulting cosmic star formation history is ≈0.4 dex lower at z ≳ 9.5 when an AGN component is included in the fitting. This alleviates previously reported excess star formation at z ≳ 9.5 compared to models based on typical baryon conversion efficiencies inside dark matter halos. We find that the individual stellar masses and star formation rates can be as much as ≈4 dex lower when fitting with an AGN component. These results highlight the importance of considering both stellar mass assembly and supermassive black hole growth when interpreting the light distributions of among the first galaxies to ever exist.

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SN - 2041-8205

VL - 959

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

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M1 - L18

ER -

Star Formation and AGN Activity 500 Myr after the Big Bang: Insights from JWST

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Unveiling the mass of the Universe: stars, gas, plasma and dark matter

Hot Fuzz: The evolution of satellite galaxies via mergers and stripping

ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions

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Star Formation and AGN Activity 500 Myr after the Big Bang: Insights from JWST

Abstract

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Projects

Unveiling the mass of the Universe: stars, gas, plasma and dark matter

Hot Fuzz: The evolution of satellite galaxies via mergers and stripping

ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions

Cite this