Outputs (16)

Swift: A modern highly-parallel gravity and smoothed particle hydrodynamics solver for astrophysical and cosmological applications (2024)
Journal Article
Schaller, M., Borrow, J., Draper, P. W., Ivkovic, M., McAlpine, S., Vandenbroucke, B., Bahé, Y., Chaikin, E., Chalk, A. B. G., Chan, T. K., Correa, C., van Daalen, M., Elbers, W., Gonnet, P., Hausammann, L., Helly, J., Huško, F., Kegerreis, J. A., Nobels, F. S. J., Ploeckinger, S., …Xiang, Z. (2024). Swift: A modern highly-parallel gravity and smoothed particle hydrodynamics solver for astrophysical and cosmological applications. Monthly Notices of the Royal Astronomical Society, 530(2), 2378–2419. https://doi.org/10.1093/mnras/stae922

Numerical simulations have become one of the key tools used by theorists in all the fields of astrophysics and cosmology. The development of modern tools that target the largest existing computing systems and exploit state-of-the-art numerical method... Read More about Swift: A modern highly-parallel gravity and smoothed particle hydrodynamics solver for astrophysical and cosmological applications.

The impact and response of mini-haloes and the interhalo medium on cosmic reionization (2024)
Journal Article
Chan, T. K., Benítez-Llambay, A., Theuns, T., Frenk, C., & Bower, R. (2024). The impact and response of mini-haloes and the interhalo medium on cosmic reionization. Monthly Notices of the Royal Astronomical Society, 528(2), 1296-1326. https://doi.org/10.1093/mnras/stae114

An ionization front (I-front) that propagates through an inhomogeneous medium is slowed down by self-shielding and recombination's. We perform cosmological radiation hydrodynamics simulations of the I-front propagation during the epoch of cosmic reio... Read More about The impact and response of mini-haloes and the interhalo medium on cosmic reionization.

A halo model for cosmological Lyman-limit systems (2023)
Journal Article
Theuns, T., & Keung Chan, T. (2024). A halo model for cosmological Lyman-limit systems. Monthly Notices of the Royal Astronomical Society, 527(1), 689–705. https://doi.org/10.1093/mnras/stad3176

We present an analytical model for cosmological Lyman-limit systems (LLS) that successfully reproduces the observed evolution of the mean free path (λeff) of ionizing photons. The evolution of the co-moving mean free path is predominantly a consequen... Read More about A halo model for cosmological Lyman-limit systems.

Simulations of the reionization of the clumpy intergalactic medium with a novel particle-based two-moment radiative transfer scheme (2023)
Journal Article
Keung Chan, T., Benitez-Llambay, A., Theuns, T., & Frenk, C. (2023). Simulations of the reionization of the clumpy intergalactic medium with a novel particle-based two-moment radiative transfer scheme. Proceedings of the International Astronomical Union, 16(362), 15-20. https://doi.org/10.1017/s1743921322001235

The progress of cosmic reionization depends on the presence of over-dense regions that act as photon sinks. Such sinks may slow down ionization fronts as compared to a uniform intergalactic medium (IGM) by increasing the clumping factor. We present s... Read More about Simulations of the reionization of the clumpy intergalactic medium with a novel particle-based two-moment radiative transfer scheme.

The impact of cosmic rays on dynamical balance and disc–halo interaction in L⋆ disc galaxies (2022)
Journal Article
Chan, T., Kereš, D., Gurvich, A. B., Hopkins, P. F., Trapp, C., Ji, S., & Faucher-Giguère, C.-A. (2022). The impact of cosmic rays on dynamical balance and disc–halo interaction in L⋆ disc galaxies. Monthly Notices of the Royal Astronomical Society, 517(1), 597-615. https://doi.org/10.1093/mnras/stac2236

Cosmic rays (CRs) are an important component in the interstellar medium, but their effect on the dynamics of the disc–halo interface (<10 kpc from the disc) is still unclear. We study the influence of CRs on the gas above the disc with high-resolutio... Read More about The impact of cosmic rays on dynamical balance and disc–halo interaction in L⋆ disc galaxies.

Hot-mode accretion and the physics of thin-disc galaxy formation (2022)
Journal Article
Hafen, Z., Stern, J., Bullock, J., Gurvich, A. B., Yu, S., Faucher-Giguère, C.-A., Fielding, D. B., Anglés-Alcázar, D., Quataert, E., Wetzel, A., Starkenburg, T., Boylan-Kolchin, M., Moreno, J., Feldmann, R., El-Badry, K., Chan, T., Trapp, C., Kereš, D., & Hopkins, P. F. (2022). Hot-mode accretion and the physics of thin-disc galaxy formation. Monthly Notices of the Royal Astronomical Society, 514(4), 5056-5073. https://doi.org/10.1093/mnras/stac1603

We use FIRE simulations to study disc formation in z ∼ 0, Milky Way-mass galaxies, and conclude that a key ingredient for the formation of thin stellar discs is the ability for accreting gas to develop an aligned angular momentum distribution via int... Read More about Hot-mode accretion and the physics of thin-disc galaxy formation.

The In Situ Origins of Dwarf Stellar Outskirts in FIRE-2 (2022)
Journal Article
Kado-Fong, E., Sanderson, R. E., Greene, J. E., Cunningham, E. C., Wheeler, C., Chan, T., El-Badry, K., Hopkins, P. F., Wetzel, A., Boylan-Kolchin, M., Faucher-Giguère, C.-A., Huang, S., Quataert, E., & Starkenburg, T. (2022). The In Situ Origins of Dwarf Stellar Outskirts in FIRE-2. Astrophysical Journal, 931(2), Article 152. https://doi.org/10.3847/1538-4357/ac6c88

Extended, old, and round stellar halos appear to be ubiquitous around high-mass dwarf galaxies (108.5 < M⋆/M⊙ < 109.6) in the observed universe. However, it is unlikely that these dwarfs have undergone a sufficient number of minor mergers to form ste... Read More about The In Situ Origins of Dwarf Stellar Outskirts in FIRE-2.

Gas infall and radial transport in cosmological simulations of milky way-mass discs (2021)
Journal Article
Trapp, C. W., Kereš, D., Chan, T. K., Escala, I., Hummels, C., Hopkins, P. F., Faucher-Giguère, C.-A., Murray, N., Quataert, E., & Wetzel, A. (2022). Gas infall and radial transport in cosmological simulations of milky way-mass discs. Monthly Notices of the Royal Astronomical Society, 509(3), 4149-4170. https://doi.org/10.1093/mnras/stab3251

Observations indicate that a continuous supply of gas is needed to maintain observed star formation rates in large, discy galaxies. To fuel star formation, gas must reach the inner regions of such galaxies. Despite its crucial importance for galaxy e... Read More about Gas infall and radial transport in cosmological simulations of milky way-mass discs.

Which AGN jets quench star formation in massive galaxies? (2021)
Journal Article
Su, K.-Y., Hopkins, P. F., Bryan, G. L., Somerville, R. S., Hayward, C. C., Anglés-Alcázar, D., Faucher-Giguère, C.-A., Wellons, S., Stern, J., Terrazas, B. A., Chan, T., Orr, M. E., Hummels, C., Feldmann, R., & Kereš, D. (2021). Which AGN jets quench star formation in massive galaxies?. Monthly Notices of the Royal Astronomical Society, 507(1), 175-204. https://doi.org/10.1093/mnras/stab2021

Without additional heating, radiative cooling of the halo gas of massive galaxies (Milky Way-mass and above) produces cold gas or stars exceeding that observed. Heating from active galactic nucleus (AGN) jets is likely required, but the jet propertie... Read More about Which AGN jets quench star formation in massive galaxies?.

Smoothed particle radiation hydrodynamics: two-moment method with local Eddington tensor closure (2021)
Journal Article
Chan, T., Theuns, T., Bower, R., & Frenk, C. (2021). Smoothed particle radiation hydrodynamics: two-moment method with local Eddington tensor closure. Monthly Notices of the Royal Astronomical Society, 505(4), 5784-5814. https://doi.org/10.1093/mnras/stab1686

We present a new smoothed particle hydrodynamics-radiative transfer method (SPH-M1RT) that is coupled dynamically with SPH. We implement it in the (task-based parallel) SWIFT galaxy simulation code but it can be straightforwardly implemented in other... Read More about Smoothed particle radiation hydrodynamics: two-moment method with local Eddington tensor closure.