Publications
2021
Some First Stars Were Red: Detecting Signatures of Massive Population III Formation through Long-term Stochastic Color Variations
Tyrone Woods, Chris Willott, John Regan, John Wise, Turlough Downes, Brian O'Shea & Michael Norman
The Active Fraction of Massive Black Holes in Dwarf Galaxies
Fabio Pacucci, Mar Mezcua & John Regan
Unveiling the gravitational universe at μ-Hz frequencies
2020
The Formation of Very Massive Stars in Early Galaxies and Implications for Intermediate Mass Black Holes
John Regan, John Wise, Tyrone Woods, Turlough Downes, Brian O'Shea, Michael Norman
Massive Star Formation in Metal-Enriched Haloes at High Redshift
John Regan, Zoltan Haiman, John Wise, Brian O'Shea, Michael Norman
The emergence of the first star-free atomic cooling haloes in the Universe
John Regan, John Wise, Brian O'Shea, Michael Norman
2019
Formation of Massive Black Holes in pre-Galactic Gas Clouds (Published in Nature, January 23rd 2019) PDF
John Wise, John Regan, Brian O'Shea, Michael Norman, Turlough Downes & Hao Xu
Super-Eddington Accretion and Feedback from the First Massive Seed Black Holes
John Regan, Turlough Downes, Marta Volonteri, Ricarda Beckmann, Alessandro Lupi, Maxime Trebitsch & Yohan Dubois
Titans of the Early Universe: The Prato Statement on the Origin of the First Supermassive Black Holes
Tyrone Woods et al. (John Regan co-author)
ENZO: An Adaptive Mesh Refinement Code for Astrophysics (Version 2.6)
Brunel-Smith et al. (John Regan co-author)
2018
The growth of black holes from Population III remnants in the Renaissance simulations
Britton Smith, John Regan, Turlough Downes, Michael Norman, Brian O'Shea & John Wise
Gravitational Wave Signals of the First Massive Black Hole Seeds
Tilman Hartwig, Bhaskar Agarwal & John Regan
Rise of the First Super Massive Stars
John Regan & Turlough Downes
Fragmentation inside atomic cooling haloes exposed to Lyman-Werner radiation
John Regan & Turlough Downes
2017
The formation of direct collapse black holes under the influence of streaming velocities
Anna Schauer, John Regan, Simon Glover & Ralk Klessen
An analytic resolution to the competition between Lyman-Werner radiation and metal winds in direct collapse black hole hosts
Bhaskar, Agarwal; John Regan, Ralf Klessen, Turlough Downes & Eric Zackrisson
Rapid Formation of Massive Black Holes in close proximity to Embryonic Proto Galaxies (Published in Nature Astronomy, 13th March 2017)
John Regan, Eli Visbal, John Wise, Zoltan Haiman, Peter Johansson & Greg Bryan
GRACKLE: a chemistry and cooling library for astrophysics
Smith, Britton D.;Bryan, Greg L.;Glover, Simon C. O.;Goldbaum, Nathan J.;Turk, Matthew J.;Regan, John;Wise, John H.;Schive, Hsi-Yu;Abel, Tom;Emerick, Andrew;O'Shea, Brian W.;Anninos, Peter;Hummels, Cameron B.; Khochfar, Sadegh
The Sherwood simulation suite: overview and data comparisons with the Lyman α forest at redshifts 2 ≤ z ≤ 5
Bolton, James S.;Puchwein, Ewald;Sijacki, Debora;Haehnelt, Martin G.;Kim, Tae-Sun;Meiksin, Avery;Regan, John A.; Viel, Matteo
2016
Positive or Negative? The Impact of X-ray Feedback on the Formation of Direct Collapse Black Hole Seeds
John Regan, Peter Johansson & John Wise
Forming Super-Massive Black Hole Seeds under the Influence of a Nearby Anisotropic Multi-Frequency Source
John Regan, Peter Johansson & John Wise
Music from the heavens - Gravitational waves from supermassive black hole mergers in the EAGLE simulations
Jaime Salcido, Richard Bower, Tom Theuns, Stuart McAlpine, Matthieu Schaller, Robert Crain, Joop Schaye & John Regan
2015
The effect of dark matter resolution on the collapse of baryons in high-redshift numerical simulations
John Regan, Peter Johansson & John Wise
2014
The Direct Collapse of a Massive Black Hole Seed under the Influence of an Anisotropic Lyman-Werner Source
John Regan, Peter Johansson & John Wise
Numerical resolution effects on simulations of massive black hole seeds
John Regan, Peter Johansson & Martin Haehnelt
2009
Pathways to massive black holes and compact star clusters in pre-galactic dark matter haloes with virial temperatures >~10000K
John Regan & Martin Haehnelt
The formation of compact massive self-gravitating discs in metal-free haloes with virial temperatures of ~13000-30000K
John Regan & Martin Haehnelt
Inside-out or outside-in: the topology of reionization in the photon-starved regime suggested by Lyα forest data
Tirth Choudhury, Martin Haehnelt & John Regan
2007
Numerical simulations of the Lyman α forest - a comparison of GADGET-2 and ENZO
John Regan, Martin Haehnelt & Matteo Viel
Some First Stars Were Red: Detecting Signatures of Massive Population III Formation through Long-term Stochastic Color Variations
Tyrone Woods, Chris Willott, John Regan, John Wise, Turlough Downes, Brian O'Shea & Michael Norman
The Active Fraction of Massive Black Holes in Dwarf Galaxies
Fabio Pacucci, Mar Mezcua & John Regan
Unveiling the gravitational universe at μ-Hz frequencies
2020
The Formation of Very Massive Stars in Early Galaxies and Implications for Intermediate Mass Black Holes
John Regan, John Wise, Tyrone Woods, Turlough Downes, Brian O'Shea, Michael Norman
Massive Star Formation in Metal-Enriched Haloes at High Redshift
John Regan, Zoltan Haiman, John Wise, Brian O'Shea, Michael Norman
The emergence of the first star-free atomic cooling haloes in the Universe
John Regan, John Wise, Brian O'Shea, Michael Norman
2019
Formation of Massive Black Holes in pre-Galactic Gas Clouds (Published in Nature, January 23rd 2019) PDF
John Wise, John Regan, Brian O'Shea, Michael Norman, Turlough Downes & Hao Xu
Super-Eddington Accretion and Feedback from the First Massive Seed Black Holes
John Regan, Turlough Downes, Marta Volonteri, Ricarda Beckmann, Alessandro Lupi, Maxime Trebitsch & Yohan Dubois
Titans of the Early Universe: The Prato Statement on the Origin of the First Supermassive Black Holes
Tyrone Woods et al. (John Regan co-author)
ENZO: An Adaptive Mesh Refinement Code for Astrophysics (Version 2.6)
Brunel-Smith et al. (John Regan co-author)
2018
The growth of black holes from Population III remnants in the Renaissance simulations
Britton Smith, John Regan, Turlough Downes, Michael Norman, Brian O'Shea & John Wise
Gravitational Wave Signals of the First Massive Black Hole Seeds
Tilman Hartwig, Bhaskar Agarwal & John Regan
Rise of the First Super Massive Stars
John Regan & Turlough Downes
Fragmentation inside atomic cooling haloes exposed to Lyman-Werner radiation
John Regan & Turlough Downes
2017
The formation of direct collapse black holes under the influence of streaming velocities
Anna Schauer, John Regan, Simon Glover & Ralk Klessen
An analytic resolution to the competition between Lyman-Werner radiation and metal winds in direct collapse black hole hosts
Bhaskar, Agarwal; John Regan, Ralf Klessen, Turlough Downes & Eric Zackrisson
Rapid Formation of Massive Black Holes in close proximity to Embryonic Proto Galaxies (Published in Nature Astronomy, 13th March 2017)
John Regan, Eli Visbal, John Wise, Zoltan Haiman, Peter Johansson & Greg Bryan
GRACKLE: a chemistry and cooling library for astrophysics
Smith, Britton D.;Bryan, Greg L.;Glover, Simon C. O.;Goldbaum, Nathan J.;Turk, Matthew J.;Regan, John;Wise, John H.;Schive, Hsi-Yu;Abel, Tom;Emerick, Andrew;O'Shea, Brian W.;Anninos, Peter;Hummels, Cameron B.; Khochfar, Sadegh
The Sherwood simulation suite: overview and data comparisons with the Lyman α forest at redshifts 2 ≤ z ≤ 5
Bolton, James S.;Puchwein, Ewald;Sijacki, Debora;Haehnelt, Martin G.;Kim, Tae-Sun;Meiksin, Avery;Regan, John A.; Viel, Matteo
2016
Positive or Negative? The Impact of X-ray Feedback on the Formation of Direct Collapse Black Hole Seeds
John Regan, Peter Johansson & John Wise
Forming Super-Massive Black Hole Seeds under the Influence of a Nearby Anisotropic Multi-Frequency Source
John Regan, Peter Johansson & John Wise
Music from the heavens - Gravitational waves from supermassive black hole mergers in the EAGLE simulations
Jaime Salcido, Richard Bower, Tom Theuns, Stuart McAlpine, Matthieu Schaller, Robert Crain, Joop Schaye & John Regan
2015
The effect of dark matter resolution on the collapse of baryons in high-redshift numerical simulations
John Regan, Peter Johansson & John Wise
2014
The Direct Collapse of a Massive Black Hole Seed under the Influence of an Anisotropic Lyman-Werner Source
John Regan, Peter Johansson & John Wise
Numerical resolution effects on simulations of massive black hole seeds
John Regan, Peter Johansson & Martin Haehnelt
2009
Pathways to massive black holes and compact star clusters in pre-galactic dark matter haloes with virial temperatures >~10000K
John Regan & Martin Haehnelt
The formation of compact massive self-gravitating discs in metal-free haloes with virial temperatures of ~13000-30000K
John Regan & Martin Haehnelt
Inside-out or outside-in: the topology of reionization in the photon-starved regime suggested by Lyα forest data
Tirth Choudhury, Martin Haehnelt & John Regan
2007
Numerical simulations of the Lyman α forest - a comparison of GADGET-2 and ENZO
John Regan, Martin Haehnelt & Matteo Viel