Professor Andrew Bunker: Publications

GA-NIFS: The core of an extremely massive proto-cluster at the Epoch of Reionization probed with JWST/NIRSpec

(2023)

Authors:

Santiago Arribas, Michele Perna, Bruno Rodríguez Del Pino, Isabella Lamperti, Francesco D'Eugenio, Pablo G Pérez-González, Gareth C Jones, Alejandro Crespo, Mirko Curti, Seunghwan Lim, Javier Álvarez-Márquez, Andrew J Bunker, Stefano Carniani, Stéphane Charlot, Peter Jakobsen, Roberto Maiolino, Hannah Übler, Chris J Willott, Torsten Böker, Jacopo Chevallard, Chiara Circosta, Giovanni Cresci, Nimisha Kumari, Eleonora Parlanti, Jan Scholtz, Giacomo Venturi, Joris Witstok

Metal enrichment and evolution in four z > 6.5 quasar sightlines observed with JWST/NIRSpec

Astronomy & Astrophysics EDP Sciences 680 (2023) a82

Authors:

L Christensen, P Jakobsen, C Willott, S Arribas, A Bunker, S Charlot, R Maiolino, M Marshall, M Perna, H Übler

JADES: A large population of obscured, narrow line AGN at high redshift

(2023)

Authors:

Jan Scholtz, Roberto Maiolino, Francesco D'Eugenio, Emma Curtis-Lake, Stefano Carniani, Stephane Charlot, Mirko Curti, Maddie S Silcock, Santiago Arribas, William Baker, Rachana Bhatawdekar, Kristan Boyett, Andrew J Bunker, Jacopo Chevallard, Chiara Circosta, Daniel J Eisenstein, Kevin Hainline, Ryan Hausen, Xihan Ji, Zhiyuan Ji, Benjamin D Johnson, Nimisha Kumari, Tobias J Looser, Jianwei Lyu, Michael V Maseda, Eleonora Parlanti, Michele Perna, Marcia Rieke, Brant Robertson, Bruno Rodríguez Del Pino, Fengwu Sun, Sandro Tacchella, Hannah Übler, Giacomo Venturi, Christina C Williams, Christopher NA Willmer, Chris Willott, Joris Witstok

Low-mass bursty galaxies in JADES efficiently produce ionizing photons and could represent the main drivers of reionization

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 527:3 (2023) 6139-6157

Authors:

C Simmonds, S Tacchella, K Hainline, BD Johnson, W McClymont, B Robertson, A Saxena, F Sun, C Witten, WM Baker, R Bhatawdekar, K Boyett, AJ Bunker, S Charlot, E Curtis-Lake, E Egami, DJ Eisenstein, R Hausen, R Maiolino, MV Maseda, J Scholtz, CC Williams, C Willott, J Witstok

Inside the bubble: exploring the environments of reionisation-era Lyman-α emitting galaxies with JADES and FRESCO

Astronomy & Astrophysics EDP Sciences 682 (2023) A40-A40

Authors:

Joris Witstok, Renske Smit, Aayush Saxena, Gareth C Jones, Jakob M Helton, Fengwu Sun, Roberto Maiolino, Nimisha Kumari, Daniel P Stark, Andrew J Bunker, Santiago Arribas, William M Baker, Rachana Bhatawdekar, Kristan Boyett, Alex J Cameron, Stefano Carniani, Stephane Charlot, Jacopo Chevallard, Mirko Curti, Emma Curtis-Lake, Daniel J Eisenstein, Ryan Endsley, Kevin Hainline, Zhiyuan Ji, Benjamin D Johnson

Abstract:

© 2024 The Author(s). Published by EDP Sciences. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY), https://creativecommons.org/licenses/by/4.0/We present a study of the environments of 17 Lyman-α emitting galaxies (LAEs) in the reionisation-era (5.8 5%) observed in our sample of LAEs, suggesting the presence of ionised hydrogen along the line of sight towards at least eight out of 17 LAEs. We find minimum physical 'bubble'sizes of the order of R ion ∼ 0.1- 1pMpc are required in a patchy reionisation scenario where ionised bubbles containing the LAEs are embedded in a fully neutral IGM. Around half of the LAEs in our sample are found to coincide with large-scale galaxy overdensities seen in FRESCO at z ∼ 5.8- 5.9 and z ∼ 7.3, suggesting Lyman-α transmission is strongly enhanced in such overdense regions, and underlining the importance of LAEs as tracers of the first large-scale ionised bubbles. Considering only spectroscopically confirmed galaxies, we find our sample of UV-faint LAEs (M UV ≳ -20mag) and their direct neighbours are generally not able to produce the required ionised regions based on the Lyman-α transmission properties, suggesting lower-luminosity sources likely play an important role in carving out these bubbles. These observations demonstrate the combined power of JWST multi-object and slitless spectroscopy in acquiring a unique view of the early Universe during cosmic reionisation via the most distant LAEs.Peer reviewe

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