Publications
Book Chapters
- The interplay between dust and radiation
A. J. Richings, 2024, in Astrochemical Modelling: Practical aspects of microphysics in numerical simulations, Edited by S. Bovino & T. Grassi, ISBN: 978-0-323-91746-9, Elsevier, p. 157-188
Refereed Journal Articles
- The evolution of the galaxy gas-phase mass-metallicity relation from z = 15 to z = 0 in the COLIBRE cosmological simulations
P. Sharda, J. Schaye, R. J. McGibbon, A. Benítez-Llambay, E. Chaikin, C. S. Frenk, J. Hodge, F. Huško, S. Ploeckinger, A. J. Richings, M. Schaller, 2026, arXiv:2606.25995, submitted to MNRAS - Investigating black hole accretion and feedback self-regulation in Seyfert galaxies using the FIRE-3 cosmological hydrodynamic simulations
J. Mercedes-Feliz, D. Anglés-Alcázar, J. Cevallos, B. K. Oh, S. García-Burillo, R. K. Cochrane, C. Ramos Almeida, C.-A. Faucher-Giguère, A. Alonso-Herrero, A. J. Richings, M. Pereira-Santaella, J. Moreno, N. C. Roy, T. Díaz-Santos, P. F. Hopkins, arXiv:2606.25025, submitted to MNRAS - Little Red Dots on FIRE: Exploring the formation and observational signatures of ultra-compact early galaxies
N. C. Roy, D. Anglés-Alcázar, R. K. Cochrane, A. J. Richings, J. Mercedes-Feliz, C. C. Hayward, C.-A. Faucher-Giguère, E. Lambrides, R. Feldmann, B. K. Oh, A. Marszewski, G. Sun, K. Davis, J. McKinney, C. M. Casey, T. Díaz-Santos, M. Brooks, G. Farrell, 2026, arXiv:2606.23683, submitted to MNRAS - Unveiling the population of massive quenched galaxies at z>=2 in the COLIBRE simulations -- II. The role of AGN feedback and environment on their emergence
Á. Chandro-Gómez, C. d. P. Lagos, C. Power, W. M. Baker, A. Benítez-Llambay, E. Chaikin, H. G. Chittenden, C. Correa, C. S. Frenk, F. Huško, K. Ito, R. J. McGibbon, T. Nanayakkara, S. Ploeckinger, A. J. Richings, M. Schaller, J. Schaye, J. W. Trayford, F. Valentino, 2026, arXiv:2605.31052, submitted to MNRAS - The galaxy ultraviolet luminosity function from z=7 to 15 in the COLIBRE simulations
S. Lu, C. S. Frenk, C. G. Lacey, A. Gebek, J. Schaye, S. Cole, S. Bose, A. Durrant, N. Andreadis, M. Baes, A. Benítez-Llambay, E. Chaikin, C. Correa, R. A. Crain, F. Huško, R. J. McGibbon, S. Ploeckinger, A. J. Richings, M. Schaller, J. W. Trayford, 2026, arXiv:2605.06782, submitted to MNRAS - Galaxy luminosity functions from far-UV to submillimetre at z=0 in the COLIBRE simulations
S. Lu, C. S. Frenk, C. G. Lacey, A. Gebek, J. Schaye, S. Cole, S. Bose, N. Andreadis, M. Baes, A. Benítez-Llambay, E. Chaikin, R. A. Crain, A. Durrant, F. Huško, S. Ploeckinger, A. J. Richings, M. Schaller, J. W. Trayford, 2026, arXiv:2605.02022, submitted to MNRAS - The morphologies of present-day galaxies in the COLIBRE simulations
V. J. Forouhar Moreno, J. Schaye, M. Schaller, A. Ludlow, R. J. McGibbon, A. Benítez-Llambay, E. Chaikin, C. S. Frenk, F. Huško, S. Ploeckinger, A. J. Richings, J. W. Trayford, 2026, arXiv:2604.03503, submitted to MNRAS - The tidal evolution of satellite galaxies in cosmological simulations: insights from COLIBRE
F. He, J. Han, J. Schaye, W. Wang, Z. Li, S. Ploeckinger, E. Chaikin, R. J. McGibbon, F. Huško, M. Schaller, A. Benítez-Llambay, A. J. Richings, J. W. Trayford, C. S. Frenk, F. Jiang, 2026, arXiv:2604.03105, submitted to MNRAS - The evolution of the sizes and angular momentum content of galaxies in the COLIBRE simulations
A. D. Ludlow, K. L. Proctor, J. Schaye, F. Huško, V. J. Forouhar Moreno, D. Obreschkow, E. Chaikin, M. Schaller, S. Ploeckinger, A. Benítez-Llambay, K. A. Oman, R. J. McGibbon, J. W. Trayford, C. S. Frenk, A. J. Richings, 2026, arXiv:2603.26200, submitted to MNRAS - Unveiling the properties and origin of massive quenched galaxies at z≥2 in the COLIBRE hydrodynamical simulations
Á. Chandro-Gómez, C. d. P. Lagos, C. Power, W. M. Baker, A. Benítez-Llambay, E. Chaikin, H. G. Chittenden, C. Correa, C. S. Frenk, F. Huško, R. J. McGibbon, T. Nanayakkara, S. Ploeckinger, A. J. Richings, M. Schaller, J. Schaye, J. W. Trayford, 2025, arXiv:2512.16208, submitted to MNRAS - The role of galactic winds fueling central starbursts and quasars in the FIRE cosmological simulations
J. Mercedes-Feliz, D. Anglés-Alcázar, B. K. Oh, R. K. Cochrane, S. Wellons, A. J. Richings, J. Moreno, C.-A. Faucher-Giguère, P. F. Hopkins, D. Kereš, 2025, arXiv:2510.19905, submitted to MNRAS - Columba: isolated dwarf galaxy populations in diverse cosmological environments simulated with a cold interstellar medium
J. M. Briggs, A. Fattahi, R. A. Crain, Y. M. Bahe, S. Ploeckinger, M. Schaller, A. Benítez-Llambay, E. Chaikin, A. J. Richings, J. Schaye, 2026, arXiv:2606.26445, accepted for publication in MNRAS - Kennicutt-Schmidt relation of galaxies over 13 billion years in the COLIBRE hydrodynamical simulations
C. d. P. Lagos, J. Schaye, M. Schaller, D. Obreschkow, Y. M. Bahé, A. Benítez-Llambay, E. Chaikin, C. Correa, T. A. Davis, C. S. Frenk, F. Huško, M. Kaasinen, R. J. McGibbon, K. Oman, S. Ploeckinger, A. J. Richings, J. W. Trayford, J. Wang, R. J. Wright, 2026, MNRAS, 549, stag947 - The evolution of the galaxy stellar mass function and star formation rates in the COLIBRE simulations from redshift 17 to 0
E. Chaikin, J. Schaye, M. Schaller, S. Ploeckinger, A. Benítez-Llambay, C. S. Frenk, F. Huško, R. McGibbon, A. J. Richings, J. W. Trayford, 2026, MNRAS, 548, stag740 - A subgrid model for chemical enrichment in cosmological simulations
C. A. Correa, J. Schaye, M. Schaller, J. W. Trayford, E. Chaikin, A. Benítez-Llambay, C. S. Frenk, S. Ploeckinger, A. J. Richings, 2026, MNRAS, 548, stag645 - COLIBRE: calibrating subgrid feedback in cosmological simulations that include a cold gas phase
E. Chaikin, J. Schaye, M. Schaller, S. Ploeckinger, Y. M. Bahé, A. Benítez-Llambay, C. Correa, V. J. Forouhar Moreno, C. S. Frenk, F. Huško, R. Kugel, R. McGibbon, A. J. Richings, J. W. Trayford, J. Borrow, R. A. Crain, J. C. Helly, C. G. Lacey, A. Ludlow, F. S. J. Nobels, 2026, MNRAS, 548, stag300 - The COLIBRE project: cosmological hydrodynamical simulations of galaxy formation and evolution
J. Schaye, E. Chaikin, M. Schaller, S. Ploeckinger, F. Huško, R. McGibbon, J. W. Trayford, A. Benítez-Llambay, C. Correa, C. S. Frenk, A. J. Richings, V. J. Forouhar Moreno, Y. M. Bahé, J. Borrow, A. Durrant, A. Gebek, J. C. Helly, A. Jenkins, C. G. Lacey, A. Ludlow, F. S. J. Nobels, 2026, MNRAS, 548, stag375 - The HyLight model for hydrogen emission lines in simulated nebulae
Y. Liu, T. Theuns, T. K. Chan, A. J. Richings, A. F. McLeod, 2026, MNRAS, 547, stag429 - Dynamical disequilibrium in dwarf galaxies: rethinking gas dynamics, rotation curves, and dark matter inference
D. Dado, K. A. Oman, K. E. Harborne, F. Fragkoudi, J. Schaye, M. Schaller, A. Benítez-Llambay, E. Chaikin, C. S. Frenk, F. Huško, S. Ploeckinger, A. J. Richings, 2026, MNRAS, 547, stag356 - A hybrid active galactic nucleus feedback model with spinning black holes, winds and jets
F. Huško, C. G. Lacey, J. Schaye, M. Schaller, E. Chaikin, S. Ploeckinger, A. Benítez-Llambay, A. J. Richings, J. W. Trayford, 2026, MNRAS, 547, stag324 - Non-explosive pre-supernova feedback in the COLIBRE model of galaxy formation
A. Benítez-Llambay, S. Ploeckinger, J. Schaye, A. J. Richings, E. Chaikin, M. Schaller, J. W. Trayford, C. S. Frenk, F. Huško, C. Correa, 2026, MNRAS, 546, stag268 - Gravitational potential drives the concentration dependence of the stellar mass-halo mass relation
K. Wang, J. Schaye, A. Benítez-Llambay, E. Chaikin, C. S. Frenk, F. Huško, R. J. McGibbon, S. Ploeckinger, A. J. Richings, M. Schaller, J. W. Trayford, 2026, MNRAS, 546, stag110 - SPARCS - combining radiation hydrodynamics with non-equilibrium metal chemistry in the SWIFT astrophysical code
T. K. Chan, A. J. Richings, T. Theuns, Y. Liu, M. Schaller, M. Ivkovic, 2026, MNRAS, 546, stag004 - Modelling the evolution and influence of dust in cosmological simulations that include the cold phase of the interstellar medium
J. W. Trayford, J. Schaye, C. Correa, S. Ploeckinger, A. J. Richings, E. Chaikin, M. Schaller, A. Benítez-Llambay, C. Frenk, F. Huško, 2026, MNRAS, 545, staf2040 - Emission line tracers of galactic outflows driven by stellar feedback in simulations of isolated disk galaxies
E. L. Howatson, A. J. Richings, E. Roediger, C.-A. Faucher-Giguère, T. Theuns, Y. Liu, T. K. Chan, O. Thompson, C. Carr, D. Anglés-Alcázar, 2025, MNRAS, 543, 3428 - Hybrid-chimes: A model for radiative cooling and the abundances of ions and molecules in simulations of galaxy formation
S. Ploeckinger, A. J. Richings, J. Schaye, J. W. Trayford, M. Schaller, E. Chaikin, 2025, MNRAS, 543, 891 - Hydrodynamic simulations of the Disc of Gas Around Supermassive black holes (HDGAS) -II; The transition from neutral atomic to molecular gas phases
M. Raouf, S. Viti, R. Karimi, A. J. Richings, 2025, MNRAS, 539, 1516 - Tests of subgrid models for star formation using simulations of isolated disk galaxies
F. S. J. Nobels, J. Schaye, M. Schaller, S. Ploeckinger, E. Chaikin, A. J. Richings, 2024, MNRAS, 532, 3299 - Predictions for CO emission and the CO-to-H2 conversion factor in galaxy simulations with non-equilibrium chemistry
O. A. Thompson, A. J. Richings, B. K. Gibson, C.-A. Faucher-Giguère, R. Feldmann, C. C. Hayward, 2024, MNRAS, 532, 1948 - Dense stellar clump formation driven by strong quasar winds in the FIRE cosmological hydrodynamic simulations
J. Mercedes-Feliz, D. Anglés-Alcázar, B. Kiat Oh, C. C. Hayward, R. K. Cochrane, A. J. Richings, C.-A. Faucher-Giguère, S. Wellons, B. A. Terrazas, J. Moreno, K. Y. Su, P. F. Hopkins, 2024, MNRAS, 530, 2795 - [CII] 158 μm emission as an indicator of galaxy star formation rate
L. Liang, R. Feldmann, N. Murray, D. Narayanan, C. C. Hayward, D. Anglés-Alcázar, L. Bassini, A. J. Richings, C.-A. Faucher-Giguère, D. T. Chung, J. Y. H. Chan, O. Çatmabacak, D. Kereš, P. F. Hopkins, 2024, MNRAS, 528, 499 - Local positive feedback in the overall negative: the impact of quasar winds on star formation in the FIRE cosmological simulations
J. Mercedes-Feliz, D. Anglés-Alcázar, C. C. Hayward, R. K. Cochrane, B. A. Terrazas, S. Wellons, A. J. Richings, C.-A. Faucher-Giguère, J. Moreno, K. Y. Su, P. F. Hopkins, E. Quataert, D. Kereš, 2023, MNRAS, 524, 3446 - Hydrodynamic simulations of the Disk of Gas Around Supermassive black holes (HDGAS) -I; Molecular Gas Dynamics
M. Raouf, S. Viti, S. García-Burillo, A. J. Richings, J. Schaye, A. Bemis, F. S. J. Nobels, M. Guainazzi, K.-Y. Huang, M. Schaller, V. Impellizzeri, J. Holdship, 2023, MNRAS, 524, 786 - Rapid disc settling and the transition from bursty to steady star formation in Milky Way-mass galaxies
A. B. Gurvich, J. Stern, C.-A. Faucher-Giguère, P. F. Hopkins, A. Wetzel, J. Moreno, C. C. Hayward, A. J. Richings, Z. Hafen, 2023, MNRAS, 519, 2598 - The effects of local stellar radiation and dust depletion on non-equilibrium interstellar chemistry
A. J. Richings, C.-A. Faucher-Giguère, A. B. Gurvich, J. Schaye, C. C. Hayward, 2022, MNRAS, 517, 1557 - Unravelling the physics of multiphase AGN winds through emission line tracers
A. J. Richings, C.-A. Faucher-Giguère, J. Stern, 2021, MNRAS, 503, 1568 - The changing circumgalactic medium over the last 10 Gyr I: Physical and dynamical properties
E. Huscher, B. D. Oppenheimer, A. Lonardi, R. A. Crain, A. J. Richings, J. Schaye, 2021, MNRAS, 500, 1476 - Reproducing the CO-to-H2 conversion factor in cosmological simulations of Milky Way-mass galaxies
L. C. Keating, A. J. Richings, N. Murray, C.-A. Faucher-Giguère, P. F. Hopkins, A. Wetzel, D. Kereš, S. Benincasa, R. Feldmann, S. Loebman, M. E. Orr, 2020, MNRAS, 499, 837 - Pressure balance in the multiphase ISM of cosmologically simulated disk galaxies
A. Gurvich, C.-A. Faucher-Giguère, A. J. Richings, P. F. Hopkins, M. Y. Grudić, Z. Hafen, S. Wellons, J. Stern, E. Quataert, T. K. Chan, M. E. Orr, D. Kereš, A. Wetzel, C. C. Hayward, S. R. Loebman, N. Murray, 2020, MNRAS, 498, 3664 - The multiphase circumgalactic medium traced by low metal ions in EAGLE zoom simulations
B. D. Oppenheimer, J. Schaye, R. A. Crain, J. K. Werk, A. J. Richings, 2018, MNRAS, 481, 835 - Radiative cooling of swept up gas in AGN-driven galactic winds and its implications for molecular outflows
A. J. Richings, C.-A. Faucher-Giguère, 2018, MNRAS, 478, 3100 - Flickering AGN can explain the strong circumgalactic O VI observed by COS-Halos
B. D. Oppenheimer, M. Segers, J. Schaye, A. J. Richings, R. A. Crain, 2018, MNRAS, 474, 4740 - The origin of fast molecular outflows in quasars: molecule formation in AGN-driven galactic winds
A. J. Richings, C.-A. Faucher-Giguère, 2018, MNRAS, 474, 3673 - Metals in the circumgalactic medium are out of ionization equilibrium due to fluctuating active galactic nuclei
M. C. Segers, B. D. Oppenheimer, J. Schaye, A. J. Richings, 2017, MNRAS, 471, 1026 - Chemical evolution of giant molecular clouds in simulations of galaxies
A. J. Richings, J. Schaye, 2016, MNRAS, 460, 2297 - Bimodality of low-redshift circumgalactic O VI in non-equilibrium EAGLE zoom simulations
B. D. Oppenheimer, R. A. Crain, J. Schaye, A. Rahmati, A. J. Richings, J. W. Trayford, J. Tumlinson, R. G. Bower, M. Schaller, T. Theuns, 2016, MNRAS, 460, 2157 - The effects of metallicity, UV radiation and non-equilibrium chemistry in high-resolution simulations of galaxies
A. J. Richings, J. Schaye, 2016, MNRAS, 458, 270 - Non-equilibrium chemistry and cooling in the diffuse interstellar medium - II. Shielded Gas
A. J. Richings, J. Schaye, B. D. Oppenheimer, 2014, MNRAS, 442, 2780
Supplementary material can be found here. - Non-equilibrium chemistry and cooling in the diffuse interstellar medium - I. Optically Thin Regime
A. J. Richings, J. Schaye, B. D. Oppenheimer, 2014, MNRAS, 440, 3349
Supplementary material can be found here. - The connection between radio loudness and central surface brightness profiles in optically selected low-luminosity active galaxies
A. J. Richings, P. Uttley & E. Kording, 2011, MNRAS, 415, 2158 - Field and Globular Cluster Low-mass X-ray Binaries in NGC 4278
G. Fabbiano, N. J. Brassington, L. Lentati, L. Angelini, R. L. Davies, J. Gallagher, V. Kalogera, D.-W. Kim, A. R. King, A. Kundu, S. Pellegrini, A. J. Richings, G. Trinchieri, A. Zezas, S. Zepf, 2010, ApJ, 725, 1824 - The Hot Interstellar Medium of the Interacting Galaxy NGC 4490
A. J. Richings, G. Fabbiano, Junfeng Wang & T. P. Roberts, 2010, ApJ, 723, 1375
Conference Proceedings
- Constraining the driving mechanism of galaxy-scale winds with emission line spectra
J. Stern, J. Oñorbe, A. J. Richings, S. D. Johnson, C.-A. Faucher-Giguère, 2024, Black Hole Winds at All Scales, held 12-16 March, 2023 in Haifa, Israel. Edited by Gabriele Bruni, Maria Diaz Trigo, Sibasish Laha and Keigo Fukumura. Proceedings of the International Astronomical Union, Volume 378, pp. 45-49, doi:10.1017/S1743921323002831
Last modified: Thu Jul 4 14:55:45 BST 2024
Email: alexander.j.richings@durham.ac.uk