Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Stopyra, Stephen"'
Autor:
Wempe, Ewoud, Lavaux, Guilhem, White, Simon D. M., Helmi, Amina, Jasche, Jens, Stopyra, Stephen
Publikováno v:
A&A 691, A348 (2024)
We present a novel approach based on Bayesian field-level inference capable of resolving individual galaxies within the Local Group (LG), enabling detailed studies of its structure and formation via posterior simulations. We extend the Bayesian Origi
Externí odkaz:
http://arxiv.org/abs/2406.02228
Autor:
Doeser, Ludvig, Jamieson, Drew, Stopyra, Stephen, Lavaux, Guilhem, Leclercq, Florent, Jasche, Jens
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 535, Issue 2, December 2024, Pages 1258-1277
Analysing next-generation cosmological data requires balancing accurate modeling of non-linear gravitational structure formation and computational demands. We propose a solution by introducing a machine learning-based field-level emulator, within the
Externí odkaz:
http://arxiv.org/abs/2312.09271
We construct an anti-halo void catalogue of $150$ voids with radii $R > 10\,h^{-1}\mathrm{\,Mpc}$ in the Local Super-Volume ($<135\,h^{-1}\mathrm{\,Mpc}$ from the Milky Way), using posterior resimulation of initial conditions inferred by field-level
Externí odkaz:
http://arxiv.org/abs/2311.12926
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 527, Issue 1, January 2024, Pages 1244-1256
We investigate the accuracy requirements for field-level inference of cluster and void masses using data from galaxy surveys. We introduce a two-step framework that takes advantage of the fact that cluster masses are determined by flows on larger sca
Externí odkaz:
http://arxiv.org/abs/2304.09193
Publikováno v:
New J. Phys. 24 033009 (2022)
We derive the best possible bounds that can be placed on Yukawa- and chameleon-like modifications to the Newtonian gravitational potential with a cavity optomechanical quantum sensor. By modelling the effects on an oscillating source-sphere on the op
Externí odkaz:
http://arxiv.org/abs/2108.00742
We investigate the extent to which the number of clusters of mass exceeding $10^{15}\,M_{\odot}\,h^{-1}$ within the local super-volume ($<135\mathrm{\,Mpc}h^{-1}$) is compatible with the standard $\Lambda$CDM cosmological model. Depending on the mass
Externí odkaz:
http://arxiv.org/abs/2107.06903
Cosmic voids provide a powerful probe of the origin and evolution of structures in the Universe because their dynamics can remain near-linear to the present day. As a result they have the potential to connect large scale structure at late times to ea
Externí odkaz:
http://arxiv.org/abs/2007.14395
We present genetIC, a new code for generating initial conditions for cosmological N-body simulations. The code allows precise, user-specified alterations to be made to arbitrary regions of the simulation (while maintaining consistency with the statis
Externí odkaz:
http://arxiv.org/abs/2006.01841
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We consider light scalar fields during inflation and show how the stochastic spectral expansion method can be used to calculate two-point correlation functions of an arbitrary local function of the field in de Sitter space. In particular, we use this
Externí odkaz:
http://arxiv.org/abs/1904.11917