We examine the nonlinear structure of gravitationally collapsed objects that form in our simulations wavelike cold dark matter ($\psi$DM), described by Schr\"{o}dinger-Poisson (SP) equation with a particle mass $\sim 10^{-22} {\rm eV}$. A distinct self-bound solitonic core is found at center every halo, profile quite different from cores modeled warm or self-interacting scenarios. Furthermore, we show each surrounded an extended halo composed large fluctuating granules which modulate density...

We present the Grackle chemistry and cooling library for astrophysical simulations models. provides a treatment of non-equilibrium primordial H, D, He species, including H2 formation on dust grains; tabulated metal cooling; multiple UV background models; support radiation transfer arbitrary heat sources. The has an easily implementable interface simulation codes written in C, C++, Fortran as well Python with added convenience functions semi-analytical As open-source project, community...

The newly established luminosity functions of high-z galaxies at $4 \lesssim z 10$ can provide a stringent check on dark matter models that aim to explain the core properties dwarf galaxies. cores spheroidal are understood be too large accounted for by free streaming warm without overly suppressing formation such Here we demonstrate with cosmological simulations wave matter, $\psi$DM, appropriate light bosons as axions, does not suffer this problem, given boson mass $m_{\psi} \ge 1.2 \times...

Although still under debate, observations generally suggest that dwarf spheroidal (dSph) galaxies exhibit large constant-density cores in the centres, which can hardly be explained by dissipationless cold dark matter simulations without baryonic feedback. Wave (ψDM), characterized a single parameter, particle mass mψ, predicts central soliton core every galaxy arising from quantum pressure against gravity. Here we apply Jeans analysis assuming profile to kinematic data of eight classical...

We present a time domain waveform model that describes the inspiral, merger and ringdown of compact binary systems whose components are nonspinning, which evolve on orbits with low to moderate eccentricity. The inspiral evolution is described using third-order post-Newtonian equations both for motion binary, its far-zone radiation field. This latter component also includes instantaneous, tails tails-of-tails contributions, contribution due nonlinear memory. framework reduces approximant...

We present the newly developed code, GAMER (GPU-accelerated Adaptive MEsh Refinement code), which has adopted a novel approach to improve performance of adaptive mesh refinement (AMR) astrophysical simulations by large factor with use graphic processing unit (GPU). The AMR implementation is based on hierarchy grid patches an oct-tree data structure. adopt three-dimensional relaxing TVD scheme for hydrodynamic solver, and multi-level relaxation Poisson solver. Both solvers have been...

Light axionic dark matter, motivated by string theory, is increasingly favored for the ``no weakly interacting massive particle era''. Galaxy formation suppressed below a Jeans scale of $\ensuremath{\simeq}{10}^{8}\text{ }\text{ }{M}_{\ensuremath{\bigodot}}$ setting axion mass to ${m}_{B}\ensuremath{\sim}{10}^{\ensuremath{-}22}\text{ }\mathrm{eV}$, and large cores dwarf galaxies are explained as solitons on de Broglie scale. This persuasive, but detection inherent scalar field oscillation at...

We present gamer-2, a GPU-accelerated adaptive mesh refinement (AMR) code for astrophysics. It provides rich set of features, including time-stepping, several hydrodynamic schemes, magnetohydrodynamics, self-gravity, particles, star formation, chemistry, and radiative processes with grackle, data analysis yt, memory pool efficient object allocation. gamer-2 is fully bitwise reproducible. For the performance optimization, it adopts hybrid OpenMP/MPI/GPU parallelization utilizes overlapping...

Wave dark matter ($\ensuremath{\psi}\mathrm{DM}$), which satisfies the Schr\"odinger-Poisson equation, has recently attracted substantial attention as a possible candidate. Numerical simulations have, in past, provided powerful tool to explore this new territory of possibility. Despite their successes revealing several key features $\ensuremath{\psi}\mathrm{DM}$, further progress is limited, that cosmological so far can only address formation halos below...

Using cosmological particle hydrodynamical simulations and uniform ultraviolet backgrounds, we compare Lyman-$α$ forest flux spectra predicted by the conventional cold dark matter (CDM) model, free-particle wave (FP$ψ$DM) model extreme-axion (EA$ψ$DM) models of different initial axion field angles against BOSS absorption with a fixed boson mass $m_b\sim 10^{-22}$eV. We recover results reported previously (Iršič et al. 2017b; Armengaud 2017) that CDM agrees better data than FP$ψ$DM large...

Simulations of ultralight, $\sim 10^{-22}\,\rm eV$, bosonic dark matter exhibit rich wave-like structure, including a soliton core within surrounding halo that continuously self-interferes on the de Broglie scale. We show here as an inherent consequence, undergoes confined random walk at base potential. This is significant for fate ancient central star cluster in Eridanus II, agitated gravitationally shakes and out time scale 100\,\rm Myr$, so complete tidal disruption can occur 1\,\rm Gyr$....

ABSTRACT Wave (fuzzy) dark matter ($\psi \rm {DM}$) consists of ultralight bosons, featuring a solitonic core within granular halo. Here we extend $\psi {DM}$ to two components, with distinct particle masses m and coupled only through gravity, investigate the resulting soliton–halo structure via cosmological simulations. Specifically, assume contains 75 per cent major component 25 minor component, fix major-component mass $m_{\rm major}=1\times 10^{-22}\, eV$, explore different...

Fuzzy Dark Matter (FDM), consisting of ultralight bosons ($m_{\rm b} \sim 10^{-22}\ \rm eV$), is an intriguing alternative to Cold Matter. Numerical simulations that solve the Schr\"odinger-Poisson (SP) equation show FDM halos consist a central solitonic core, which ground state SP equation, surrounded by envelope interfering excited states. These states also interfere with soliton, causing it oscillate and execute confined random walk respect halo center mass. Using high-resolution...

Observations of massive supermassive black holes (SMBHs) in the early universe challenge existing hole formation models. We propose that soliton cores fuzzy dark matter (FDM) offer a potential solution to this timing problem. Our FDM cosmological zoom-in simulations confirm for particle mass $m_{\rm FDM}\sim 10^{-22}~{\rm eV}$, solitons are well developed at redshift $z \sim 7$ with masses $\sim10^9~M_\odot$, comparable observed SMBHs. then demonstrate using hydrodynamic that, compared cold...

Observations of massive supermassive black holes (SMBHs) in the early Universe challenge existing hole formation models. We propose that soliton cores fuzzy dark matter (FDM) offer a potential solution to this timing problem. Our FDM cosmological zoom-in simulations confirm that, for particle mass m_{FDM}∼10^{-22} eV, solitons are well developed at redshift z∼7 with masses ∼10^{9}M_{⊙}, comparable observed SMBHs. then demonstrate using hydrodynamic compared cold matter, these high-z M_{s}...

Fuzzy dark matter (FDM) has been a promising alternative to standard cold matter. The model consists of ultralight bosons with mass $m_b \sim 10^{-22}$ eV and features quantum-pressure-supported solitonic core that oscillates. In this work, we show the soliton density oscillations persist even after significant tidal stripping outer halo. We report two intrinsic yet distinct timescales associated, respectively, ground-state wavefunction $\tau_{00}$ $\tau_\text{soliton}$, obeying...

Fuzzy Dark Matter (FDM), consisting of ultralight bosons, is an intriguing alternative to Cold Matter. Numerical simulations solving the Schr\"odinger-Poisson (SP) equation, which governs FDM dynamics, show that halos consist a central solitonic core (representing ground state SP equation), surrounded by large envelope excited states. Wave interference gives rise order unity density fluctuations throughout and causes soliton undergo oscillations execute confined random walk in region halo....

ABSTRACT Fuzzy dark matter (FDM), an attractive candidate comprising ultralight bosons (axions) with a particle mass ma ∼ 10−22 eV, is motivated by the small-scale challenges of cold and features kpc-size de Broglie wavelength. Quantum wave interference inside FDM halo gives rise to stochastically fluctuating density granulation; resulting gravitational perturbations could drive significant disc thickening, providing natural explanation for galactic thick discs. Here we present first...

Wave dark matter ($\psi$DM) predicts a compact soliton core and granular halo in every galaxy. This work presents the first simulation study of an elliptical galaxy by including both stars $\psi$DM, focusing on systematic changes central granules. With addition inner halo, we find consistently becomes more prominent absorbing mass from host than that without stars, granules become "non-isothermal", "hotter" "cooler" outer as opposed to isothermal pure $\psi$DM cosmological simulations....

Abstract The fuzzy dark matter model (FDM; also known as quantum wave model) argues that light bosons with a mass of <?CDATA $\sim {10}^{-22}\,\mathrm{eV}$?> are possible candidate for in the universe. One most important predictions FDM is formation soliton core instead density cusp at center galaxies. If correct theory matter, then predicted can help form Central Molecular Zone (CMZ) Milky Way. We present high-resolution hydrodynamical simulations gas flow patterns to constrain properties...

Extremely light bosonic wave dark matter ($\ensuremath{\psi}\mathrm{DM}$) is an emerging candidate contesting the conventional cold paradigm and a model subject to intense scrutiny of late. This work for first time reports testable salient features pertinent gravitational lenses $\ensuremath{\psi}\mathrm{DM}$ halos. halos are distinctly filled with large-amplitude, small-scale density fluctuations $\ensuremath{\delta}\ensuremath{\rho}/{\ensuremath{\rho}}_{\mathrm{halo}}\ensuremath{\sim}1$ in...

We present the implementation and performance of a class directionally unsplit Riemann-solver-based hydrodynamic schemes on graphics processing units (GPUs). These schemes, including MUSCL-Hancock method, variant corner-transport-upwind are embedded into adaptive-mesh-refinement (AMR) code GAMER. Furthermore, hybrid MPI/OpenMP model is investigated, which enables full exploitation computing power in heterogeneous CPU/GPU cluster significantly improves overall performance. Performance...