All Outputs (52)

The halo light cone catalogues of AbacusSummit (2021)
Journal Article
Hadzhiyska, B., Garrison, L. H., Eisenstein, D., & Bose, S. (2022). The halo light cone catalogues of AbacusSummit. Monthly Notices of the Royal Astronomical Society, 509(2), 2194-2208. https://doi.org/10.1093/mnras/stab3066

We describe a method for generating halo catalogues on the light-cone using the ABACUSSUMMIT suite of N-body simulations. The main application of these catalogues is the construction of realistic mock galaxy catalogues and weak lensing maps on the sk... Read More about The halo light cone catalogues of AbacusSummit.

compaso: A new halo finder for competitive assignment to spherical overdensities (2021)
Journal Article
Hadzhiyska, B., Eisenstein, D., Bose, S., Garrison, L. H., & Maksimova, N. (2022). compaso: A new halo finder for competitive assignment to spherical overdensities. Monthly Notices of the Royal Astronomical Society, 509(1), 501-521. https://doi.org/10.1093/mnras/stab2980

We describe a new method (COMPASO) for identifying groups of particles in cosmological N-body simulations. COMPASO builds upon existing spherical overdensity (SO) algorithms by taking into consideration the tidal radius around a smaller halo before c... Read More about compaso: A new halo finder for competitive assignment to spherical overdensities.

Galaxy assembly bias and large-scale distribution: a comparison between IllustrisTNG and a semi-analytic model (2021)
Journal Article
Hadzhiyska, B., Liu, S., Somerville, R. S., Gabrielpillai, A., Bose, S., Eisenstein, D., & Hernquist, L. (2021). Galaxy assembly bias and large-scale distribution: a comparison between IllustrisTNG and a semi-analytic model. Monthly Notices of the Royal Astronomical Society, 508(1), 698-718. https://doi.org/10.1093/mnras/stab2564

In this work, we compare large scale structure observables for stellar mass selected samples at z = 0, as predicted by two galaxy models, the hydrodynamical simulation IllustrisTNG and the Santa-Cruz semi-analytic model (SC-SAM). Although both models... Read More about Galaxy assembly bias and large-scale distribution: a comparison between IllustrisTNG and a semi-analytic model.

AbacusSummit: a massive set of high-accuracy, high-resolution N-body simulations (2021)
Journal Article
Maksimova, N. A., Garrison, L. H., Eisenstein, D. J., Hadzhiyska, B., Bose, S., & Satterthwaite, T. P. (2021). AbacusSummit: a massive set of high-accuracy, high-resolution N-body simulations. Monthly Notices of the Royal Astronomical Society, 508(3), 4017-4037. https://doi.org/10.1093/mnras/stab2484

We present the public data release of the ABACUSSUMMIT cosmological N-body simulation suite, produced with the ABACUS N-body code on the Summit supercomputer of the Oak Ridge Leadership Computing Facility. ABACUS achieves O(10−5) median fractional fo... Read More about AbacusSummit: a massive set of high-accuracy, high-resolution N-body simulations.

Universal structure of dark matter haloes over a mass range of 20 orders of magnitude (2020)
Journal Article
Wang, J., Bose, S., Frenk, C., Gao, L., Jenkins, A., Springel, V., & White, S. (2020). Universal structure of dark matter haloes over a mass range of 20 orders of magnitude. Nature, 585(7823), 39-42. https://doi.org/10.1038/s41586-020-2642-9

Cosmological models in which dark matter consists of cold elementary particles predict that the dark halo population should extend to masses many orders of magnitude below those at which galaxies can form1,2,3. Here we report a cosmological simulatio... Read More about Universal structure of dark matter haloes over a mass range of 20 orders of magnitude.

The little things matter: relating the abundance of ultrafaint satellites to the hosts’ assembly history (2020)
Journal Article
Frenk, C. S., Belokurov, V., Deason, A. J., & Bose, S. (2020). The little things matter: relating the abundance of ultrafaint satellites to the hosts’ assembly history. Monthly Notices of the Royal Astronomical Society, 495(1), 743-757. https://doi.org/10.1093/mnras/staa1199

Ultrafaint dwarf galaxies (M⋆ ≤ 105 M⊙) are relics of an early phase of galaxy formation. They contain some of the oldest and most metal-poor stars in the Universe which likely formed before the epoch of hydrogen reionisation. These galaxies are so f... Read More about The little things matter: relating the abundance of ultrafaint satellites to the hosts’ assembly history.

The accuracy of weak lensing simulations (2020)
Journal Article
Hilbert, S., Barreira, A., Fabbian, G., Fosalba, P., Giocoli, C., Bose, S., Calabrese, M., Carbone, C., Davies, C. T., Li, B., Llineares, C., & Monaco, P. (2020). The accuracy of weak lensing simulations. Monthly Notices of the Royal Astronomical Society, 493(1), 305-319. https://doi.org/10.1093/mnras/staa281

We investigate the accuracy of weak lensing simulations by comparing the results of five independently developed lensing simulation codes run on the same input N-body simulation. Our comparison focuses on the lensing convergence maps produced by the... Read More about The accuracy of weak lensing simulations.

Speeding up N-body simulations of modified gravity: Vainshtein screening models (2015)
Journal Article
Barreira, A., Bose, S., & Li, B. (2015). Speeding up N-body simulations of modified gravity: Vainshtein screening models. Journal of Cosmology and Astroparticle Physics, 2015(12), Article 059. https://doi.org/10.1088/1475-7516/2015/12/059

We introduce and demonstrate the power of a method to speed up current iterative techniques for N-body modified gravity simulations. Our method is based on the observation that the accuracy of the final result is not compromised if the calculation of... Read More about Speeding up N-body simulations of modified gravity: Vainshtein screening models.

The Copernicus Complexio: Statistical Properties of Warm Dark Matter Haloes (2015)
Journal Article
Bose, S., Hellwing, W., Frenk, C., Jenkins, A., Lovell, M., Helly, J., & Li, B. (2016). The Copernicus Complexio: Statistical Properties of Warm Dark Matter Haloes. Monthly Notices of the Royal Astronomical Society, 455(1), 318-333. https://doi.org/10.1093/mnras/stv2294

The recent detection of a 3.5 keV X-ray line from the centres of galaxies and clusters by Bulbul et al. and Boyarsky et al. has been interpreted as emission from the decay of 7 keV sterile neutrinos which could make up the (warm) dark matter (WDM). A... Read More about The Copernicus Complexio: Statistical Properties of Warm Dark Matter Haloes.

Planes of satellite galaxies: when exceptions are the rule (2015)
Journal Article
Cautun, M., Bose, S., Frenk, C. S., Guo, Q., Han, J., Hellwing, W. A., Sawala, T., & Wang, W. (2015). Planes of satellite galaxies: when exceptions are the rule. Monthly Notices of the Royal Astronomical Society, 452(4), 3838-3852. https://doi.org/10.1093/mnras/stv1557

The detection of planar structures within the satellite systems of both the Milky Way (MW) and Andromeda (M31) has been reported as being in stark contradiction to the predictions of the standard cosmological model (Λ cold dark matter – ΛCDM). Given... Read More about Planes of satellite galaxies: when exceptions are the rule.

Testing the quasi-static approximation in f(R) gravity simulations (2015)
Journal Article
Bose, S., Hellwing, W. A., & Li, B. (2015). Testing the quasi-static approximation in f(R) gravity simulations. Journal of Cosmology and Astroparticle Physics, 2015(02), https://doi.org/10.1088/1475-7516/2015/02/034

Numerical simulations in modified gravity have commonly been performed under the quasi-static approximation—that is, by neglecting the effect of time derivatives in the equation of motion of the scalar field that governs the fifth force in a given mo... Read More about Testing the quasi-static approximation in f(R) gravity simulations.

Gauge theories and dessins d’enfants: beyond the torus (2015)
Journal Article
Bose, S., Gundry, J., & He, Y.-H. (2015). Gauge theories and dessins d’enfants: beyond the torus. Journal of High Energy Physics, 2015(1), Article 135. https://doi.org/10.1007/jhep01%282015%29135

Dessin d’enfants on elliptic curves are a powerful way of encoding doubly-periodic brane tilings, and thus, of four-dimensional supersymmetric gauge theories whose vacuum moduli space is toric, providing an interesting interplay between physics, geom... Read More about Gauge theories and dessins d’enfants: beyond the torus.