Publications
2025
First light and reionization epoch simulations (FLARES) ─ XIX. Supermassive black hole mergers in the early Universe and their environmental dependence Shihong Liao, Dimitrios Irodotou, Maxwell G. A. Maltz, Christopher C. Lovell, Zhen Jiang, Sophie L. Newman, Aswin P. Vijayan, Paurush Punyasheel, William J. Roper, Louise T. C. Seeyave, Sonja Soininen, Peter A. Thomas, & Stephen M. Wilkins MNRAS, 543(3), 3055-3070, 2025 DOI | ADS
Synthesizer: a Software Package for Synthetic Astronomical Observables Christopher C. Lovell, William J. Roper, Aswin P. Vijayan, Stephen M. Wilkins, Sophie Newman, & Louise Seeyave The Open Journal of Astrophysics, 8, 152, 2025 DOI | ADS
Learning the Universe: Cosmological and Astrophysical Parameter Inference with Galaxy Luminosity Functions and Colours Christopher C. Lovell, Tjitske Starkenburg, Matthew Ho, Daniel Anglés-Alcázar, Romeel Davé, Austen Gabrielpillai, Kartheik G. Iyer, Alice E. Matthews, William J. Roper, Rachel S. Somerville, Laura Sommovigo, & Francisco Villaescusa-Navarro MNRAS, 2025 DOI | ADS
Cloudy-Maraston: Integrating nebular continuum and line emission with the Maraston stellar population synthesis models Sophie L. Newman, Christopher C. Lovell, Claudia Maraston, William J. Roper, Aswin P. Vijayan, Stephen M. Wilkins, Mauro Giavalisco, & Aayush Saxena MNRAS, 2025 DOI | ADS
The Nature of High-Redshift Massive Quiescent Galaxies – Searching for RUBIES-UDS-QG-z7 in FLARES Jack C. Turner, Will J. Roper, Aswin P. Vijayan, Sophie L. Newman, Stephen M. Wilkins, Christopher C. Lovell, Shihong Liao, & Louise T. C. Seeyave arXiv e-prints, 2025 DOI | ADS
Interpreting nebular emission lines in the high-redshift Universe Aswin P. Vijayan, Robert M. Yates, Christopher C. Lovell, William J. Roper, Stephen M. Wilkins, Hiddo S. B. Algera, Shihong Liao, Paurush Punyasheel, Lucie E. Rowland, & Louise T. C. Seeyave arXiv e-prints, 2025 DOI | ADS
Synthesizer: Synthetic Observables For Modern Astronomy Will J. Roper, Christopher Lovell, Aswin Vijayan, Stephen Wilkins, Hollis Akins, Sabrina Berger, Connor Sant Fournier, Thomas Harvey, Kartheik Iyer, Marco Leonardi, Sophie Newman, Borja Pautasso, Ashley Perry, Louise Seeyave, & Laura Sommovigo arXiv e-prints, 2025 DOI | ADS
First Light and Reionization Epoch Simulations (FLARES) – XVIII: the ionising emissivities and hydrogen recombination line properties of early AGN Stephen M. Wilkins, Aswin P. Vijayan, Scott Hagen, Joseph Caruana, Christopher J. Conselice, Chris Done, Michaela Hirschmann, Dimitrios Irodotou, Christopher C. Lovell, Jorryt Matthee, Adèle Plat, William J. Roper, & Anthony J. Taylor arXiv e-prints, 2025 DOI | ADS
First Light And Reionisation Epoch Simulations (FLARES): XVI. Size evolution of massive dusty galaxies at cosmic dawn from the ultraviolet to infrared Paurush Punyasheel, Aswin P. Vijayan, Thomas R. Greve, William J. Roper, Hiddo Algera, Steven Gillman, Bitten Gullberg, Dimitrios Irodotou, Christopher C. Lovell, Louise T. C. Seeyave, Peter A. Thomas, & Stephen M. Wilkins A&A, 696, A234, 2025 DOI | ADS
First Light and Reionization Epoch Simulations (FLARES) - XVII. Learning the galaxy-halo connection at high redshifts Maxwell G. A. Maltz, Peter A. Thomas, Christoper C. Lovell, William J. Roper, Aswin P. Vijayan, Dimitrios Irodotou, Shihong Liao, Louise T. C. Seeyave, & Stephen M. Wilkins MNRAS, 538(4), 3084-3103, 2025 DOI | ADS
ALMA Band 3 Selection of Ultra-high Redshift Dropouts: The final challenge to ΛCDM C. Lovell, M. Lee, A. Vijayan, T. Harvey, L. Sommovigo, A. Long, E. Lambrides, W. Roper, S. Wilkins, D. Narayanan, N. Adams, D. Austin, & M. Maltz arXiv e-prints, 2025 DOI | ADS
The effects of super-Eddington accretion and feedback on the growth of early supermassive black holes and galaxies Filip Huško, Cedric G. Lacey, William J. Roper, Joop Schaye, Jemima Mae Briggs, & Matthieu Schaller MNRAS, 537(3), 2559-2578, 2025 DOI | ADS
First Light and Reionization Epoch Simulations (FLARES) – XV: The physical properties of super-massive black holes and their impact on galaxies in the early universe Stephen Wilkins, Jussi K. Kuusisto, Dimitrios Irodotou, Shihong Liao, Christopher C. Lovell, Sonja Soininen, Sabrina C. Berger, Sophie L. Newman, William J. Roper, Louise T. C. Seeyave, Peter A. Thomas, & Aswin P. Vijayan The Open Journal of Astrophysics, 8, 29, 2025 DOI | ADS
2024
EPOCHS Paper V. The dependence of galaxy formation on galaxy structure at z < 7 from JWST observations Christopher J. Conselice, Justin T. F. Basham, Daniel O. Bettaney, Leonardo Ferreira, Nathan Adams, Thomas Harvey, Katherine Ormerod, Joseph Caruana, Asa F. L. Bluck, Qiong Li, William J. Roper, James Trussler, Dimitrios Irodotou, & Duncan Austin MNRAS, 531(4), 4857-4875, 2024 DOI | ADS
SWIFT: A modern highly-parallel gravity and smoothed particle hydrodynamics solver for astrophysical and cosmological applications Matthieu Schaller, Josh Borrow, Peter W. Draper, Mladen Ivkovic, Stuart McAlpine, Bert Vandenbroucke, Yannick Bahé, Evgenii Chaikin, Aidan B. G. Chalk, Tsang Keung Chan, Camila Correa, Marcel van Daalen, Willem Elbers, Pedro Gonnet, Loíc Hausammann, John Helly, Filip Huško, Jacob A. Kegerreis, Folkert S. J. Nobels, Sylvia Ploeckinger, Yves Revaz, William J. Roper, Sergio Ruiz-Bonilla, Thomas D. Sandnes, Yolan Uyttenhove, James S. Willis, & Zhen Xiang MNRAS, 530(2), 2378-2419, 2024 DOI | ADS
FOOD I: A New Division Scheme For The Stelliferous Era Stephen M. Wilkins, Sophie L. Newman, & Will J. Roper arXiv e-prints, 2024 DOI | ADS
EPOCHS VI: the size and shape evolution of galaxies since z 8 with JWST Observations K. Ormerod, C. J. Conselice, N. J. Adams, T. Harvey, D. Austin, J. Trussler, L. Ferreira, J. Caruana, G. Lucatelli, Q. Li, & W. J. Roper MNRAS, 527(3), 6110-6125, 2024 DOI | ADS
First Light and Reionization Epoch Simulations (FLARES) - XIV. The Balmer/4000 \rA breaks of distant galaxies Stephen M. Wilkins, Christopher C. Lovell, Dimitrios Irodotou, Aswin P. Vijayan, Anton Vikaeus, Erik Zackrisson, Joseph Caruana, Elizabeth R. Stanway, Christopher J. Conselice, Louise T. C. Seeyave, William J. Roper, Katherine Chworowsky, & Steven L. Finkelstein MNRAS, 527(3), 7965-7973, 2024 DOI | ADS
First Light And Reionisation Epoch Simulations (FLARES) - XII: The consequences of star-dust geometry on galaxies in the EoR Aswin P. Vijayan, Peter A. Thomas, Christopher C. Lovell, Stephen M. Wilkins, Thomas R. Greve, Dimitrios Irodotou, William J. Roper, & Louise T. C. Seeyave MNRAS, 527(3), 7337-7354, 2024 DOI | ADS
2023
First light and reionization epoch simulations (FLARES) IX: the physical mechanisms driving compact galaxy formation and evolution William J. Roper, Christopher C. Lovell, Aswin P. Vijayan, Dimitrios Irodotou, Jussi K. Kuusisto, Jasleen Matharu, Louise T. C. Seeyave, Peter A. Thomas, & Stephen M. Wilkins MNRAS, 526(4), 6128-6144, 2023 DOI | ADS
First light and reionisation epoch simulations (FLARES) - VIII. The emergence of passive galaxies at z \geq 5 Christopher C. Lovell, Will Roper, Aswin P. Vijayan, Louise Seeyave, Dimitrios Irodotou, Stephen M. Wilkins, Christopher J. Conselice, Flaminia Fortuni, Jussi K. Kuusisto, Emiliano Merlin, Paola Santini, & Peter Thomas MNRAS, 525(4), 5520-5539, 2023 DOI | ADS
Cosmic Evolution Early Release Science (CEERS) survey: The colour evolution of galaxies in the distant Universe Stephen M. Wilkins, Jack C. Turner, Micaela B. Bagley, Steven L. Finkelstein, Ricardo O. Amor’in, Adrien Aufan Stoffels D Hautefort, Peter Behroozi, Rachana Bhatawdekar, Avishai Dekel, James Donnellan, Nicole E. Drakos, Flaminia Fortuni, Nimish P. Hathi, Michaela Hirschmann, Benne W. Holwerda, Dimitrios Irodotou, Anton M. Koekemoer, Christopher C. Lovell, Emiliano Merlin, Will J. Roper, Louise T. C. Seeyave, Aswin P. Vijayan, & L. Y. Aaron Yung arXiv e-prints, 2023 DOI | ADS
Untitled William Roper PhD Thesis, University of Sussex, UK, 2023 ADS
The JWST Hubble Sequence: The Rest-frame Optical Evolution of Galaxy Structure at 1.5 < z < 6.5 Leonardo Ferreira, Christopher J. Conselice, Elizaveta Sazonova, Fabricio Ferrari, Joseph Caruana, Clár-Br’id Tohill, Geferson Lucatelli, Nathan Adams, Dimitrios Irodotou, Madeline A. Marshall, Will J. Roper, Christopher C. Lovell, Aprajita Verma, Duncan Austin, James Trussler, & Stephen M. Wilkins ApJ, 955(2), 94, 2023 DOI | ADS
First light and reionization epoch simulations (FLARES) X III: the lyman-continuum emission of high-redshift galaxies Louise T. C. Seeyave, Stephen M. Wilkins, Jussi K. Kuusisto, Christopher C. Lovell, Dimitrios Irodotou, Charlotte Simmonds, Aswin P. Vijayan, Peter A. Thomas, William J. Roper, Conor M. Byrne, Gareth T. Jones, Jack C. Turner, & Christopher J. Conselice MNRAS, 525(2), 2422-2440, 2023 DOI | ADS
First light and reionization epoch simulations (FLARES) X: environmental galaxy bias and survey variance at high redshift Peter A. Thomas, Christopher C. Lovell, Maxwell G. A. Maltz, Aswin P. Vijayan, Stephen M. Wilkins, Dimitrios Irodotou, William J. Roper, & Louise Seeyave MNRAS, 524(1), 43-59, 2023 DOI | ADS
Seeing sharper and deeper: JWST’s first glimpse of the photometric and spectroscopic properties of galaxies in the epoch of reionization James A. A. Trussler, Nathan J. Adams, Christopher J. Conselice, Leonardo Ferreira, Duncan Austin, Rachana Bhatawdekar, Joseph Caruana, Brenda L. Frye, Tom Harvey, Christopher C. Lovell, Massimo Pascale, William J. Roper, Aprajita Verma, Aswin P. Vijayan, & Stephen M. Wilkins MNRAS, 523(3), 3423-3440, 2023 DOI | ADS
First light and reionization epoch simulations (FLARES) XI: [O III] emitting galaxies at 5 < z < 10 Stephen M. Wilkins, Christopher C. Lovell, Aswin P. Vijayan, Dimitrios Irodotou, Nathan J. Adams, William J. Roper, Joseph Caruana, Jorryt Matthee, Louise T. C. Seeyave, Christopher J. Conselice, Pablo G. Pérez-González, Jack C. Turner, James M. S. Donnellan, Aprajita Verma, & J. A. A. Trussler MNRAS, 522(3), 4014-4027, 2023 DOI | ADS
Galaxy Evolution in $μ̈$ based Cosmologies Will J. Roper, Stephen M. Wilkins, Stephen Riggs, Jessica Pilling, Aswin P. Vijayan, Dimitrios Irodotou, Violetta Korbina, & Jussi Kuusisto arXiv e-prints, 2023 DOI | ADS
First light and reionization epoch simulations (FLARES) V: the redshift frontier Stephen M. Wilkins, Aswin P. Vijayan, Christopher C. Lovell, William J. Roper, Dimitrios Irodotou, Joseph Caruana, Louise T. C. Seeyave, Jussi K. Kuusisto, Peter A. Thomas, & Shedeur A. K. Parris MNRAS, 519(2), 3118-3128, 2023 DOI | ADS
First Light And Reionization Epoch Simulations (FLARES) VII: The star formation and metal enrichment histories of galaxies in the early Universe Stephen M. Wilkins, Aswin P. Vijayan, Christopher C. Lovell, William J. Roper, Erik Zackrisson, Dimitrios Irodotou, Louise T. C. Seeyave, Jussi K. Kuusisto, Peter A. Thomas, Joseph Caruana, & Christopher J. Conselice MNRAS, 518(3), 3935-3948, 2023 DOI | ADS
2022
First Light and Reionisation Epoch Simulations (FLARES) - VI. The colour evolution of galaxies z = 5-15 Stephen M. Wilkins, Aswin P. Vijayan, Christopher C. Lovell, William J. Roper, Dimitrios Irodotou, Joseph Caruana, Louise T. C. Seeyave, Jussi K. Kuusisto, & Peter A. Thomas MNRAS, 517(3), 3227-3235, 2022 DOI | ADS
The BLUETIDES mock image catalogue: simulated observations of high-redshift galaxies and predictions for JWST imaging surveys Madeline A. Marshall, Katelyn Watts, Stephen Wilkins, Tiziana Di Matteo, Jussi K. Kuusisto, William J. Roper, Aswin P. Vijayan, Yueying Ni, Yu Feng, & Rupert A. C. Croft MNRAS, 516(1), 1047-1061, 2022 DOI | ADS
First Light And Reionisation Epoch Simulations (FLARES) - IV. The size evolution of galaxies at z \geq 5 William J. Roper, Christopher C. Lovell, Aswin P. Vijayan, Madeline A. Marshall, Dimitrios Irodotou, Jussi K. Kuusisto, Peter A. Thomas, & Stephen M. Wilkins MNRAS, 514(2), 1921-1939, 2022 DOI | ADS
The impact of dust on the sizes of galaxies in the Epoch of Reionization Madeline A. Marshall, Stephen Wilkins, Tiziana Di Matteo, William J. Roper, Aswin P. Vijayan, Yueying Ni, Yu Feng, & Rupert A. C. Croft MNRAS, 511(4), 5475-5491, 2022 DOI | ADS
First Light And Reionisation Epoch Simulations (FLARES) - III. The properties of massive dusty galaxies at cosmic dawn Aswin P. Vijayan, Stephen M. Wilkins, Christopher C. Lovell, Peter A. Thomas, Peter Camps, Maarten Baes, James Trayford, Jussi Kuusisto, & William J. Roper MNRAS, 511(4), 4999-5017, 2022 DOI | ADS
COWS all tHE way Down (COWSHED) I: Could cow based planetoids support methane atmospheres? William J. Roper, Todd L. Cook, Violetta Korbina, Jussi K. Kuusisto, Roisin O’Connor, Stephen D. Riggs, David J. Turner, & Reese Wilkinson arXiv e-prints, 2022 DOI | ADS
2021
First Light And Reionization Epoch Simulations (FLARES) - II: The photometric properties of high-redshift galaxies Aswin P. Vijayan, Christopher C. Lovell, Stephen M. Wilkins, Peter A. Thomas, David J. Barnes, Dimitrios Irodotou, Jussi Kuusisto, & William J. Roper MNRAS, 501(3), 3289-3308, 2021 DOI | ADS
First Light And Reionization Epoch Simulations (FLARES) - I. Environmental dependence of high-redshift galaxy evolution Christopher C. Lovell, Aswin P. Vijayan, Peter A. Thomas, Stephen M. Wilkins, David J. Barnes, Dimitrios Irodotou, & Will Roper MNRAS, 500(2), 2127-2145, 2021 DOI | ADS
2020
MEGA: Merger graphs of structure formation William J. Roper, Peter A. Thomas, & Chaichalit Srisawat MNRAS, 494(3), 4509-4524, 2020 DOI | ADS