Nonlinear cosmological structure with ultralight bosons via modified gravity

Medellín-González, Stefany G.; Ureña–López, L. Arturo; González‐Morales, Alma X.

doi:10.1103/physrevd.103.083509

Cited by 4 publications

(6 citation statements)

References 62 publications

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“…Here, we show the self‐consistency of the solutions for the SFDM model using this approach and further validation of the results we obtained in previous work (Medellín‐González et al 2021). We start in Section 2 with a review of the SFDM equations of motion and their implementation in the code MG‐PICOLA.…”

Section: Introductionsupporting

confidence: 88%

“…Here, we see that the particle number necessary for the self‐consistency of the solutions must be fixed at 1024 3 and larger. As a reference, we show that the vertical dashed line used as a confidence limit in (Medellín‐González et al 2021) for the largest wavenumber k in the simulations was a conservative choice, and then our results are reliable at higher values of k .…”

Section: Cosmological Simulationsmentioning

confidence: 64%

“…One of the main advantages of the simulations generated by MG‐PICOLA is that they take only a fraction of the computational time compared to other implementations, as shown in our previous work (Medellín‐González et al 2021) where we compared our results with the simulations reported in (Nori & Baldi 2018).…”

Section: Cosmological Simulationsmentioning

confidence: 97%

“…In addition to the aforementioned computational cost, solving the structure formation for this model has been proven to be a challenge (Lancaster et al 2020; Mocz et al 2017, 2019; Mocz et al 2018; Mocz et al 2020; Nori et al 2019; Nori & Baldi 2018; Schive et al 2014; Schwabe et al 2020; Woo & Chiueh 2009). These approaches have some scale of validity, due to the fact that at the moment it is necessary to choose between solving small scales, where the interference at scales near the De Broglie wavelength becomes important, using the full Schrodinger‐Poisson dynamics, such as the one shown in (May & Springel 2021), or studying larger volumes as in (Medellín‐González et al 2021; Nori & Baldi 2018).…”

Section: Introductionmentioning

confidence: 99%

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Consistency tests of structure formation simulations of scalar field dark matter

2023

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The so‐called scalar field dark matter model assumes that dark matter is an ultralight axon, with its De Broglie wavelength around λ ∼ 1kpc. This can lead to a scale suppression of the mass power spectrum at sub‐galactic scales, as compared with the standard cosmological model Λcold dark matter. In this work, we show numerical tests of cosmological simulations of scalar field dark matter using an amended version of the code MG‐PICOLA with a double purpose: to validate the results in (Medellín‐González et al. 2021), and extend them to higher numerical resolutions. Our cosmological observable of interest is the mass power spectrum, and we make dedicated comparisons with that of cold dark matter to quantify the differences in the nonlinear growth of density perturbations in both models.

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Section: Introductionsupporting

confidence: 88%

Section: Cosmological Simulationsmentioning

confidence: 64%

Section: Cosmological Simulationsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Consistency tests of structure formation simulations of scalar field dark matter

2023

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“…The main objective of this work is to study the quantum character of SFDM at cosmological scales. We do not intend to analyze the evolution of the fluctuation with the scalar field, this has already been done in [10]; [36]; [11]; [37] and [38]. Instead, we want to explicitly show the quantum behavior of the scalar field during the evolution of the universe.…”

Section: Introductionmentioning

confidence: 99%

The quantum character of the Scalar Field Dark Matter

Matos

2022

Monthly Notices of the Royal Astronomical Society

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The Scalar Field Dark Matter (SFDM) model, also called Fuzzy, Wave, Bose-Einstein, Ultra-light Dark Matter, has received a lot of attention because it has been able to provide simpler and more natural explanations for various features of galaxies, such as the number of satellite galaxies and the cusp-core problem. We recently showed that this model is able to explain the vast polar orbits of satellite galaxies around their host, the so-called VPO, and to explain the X-ray and gamma-ray emissions in the vacuum regions of our galaxy, that is, the Fermi Bubbles. In all these phenomena the quantum character of SFDM has been crucial. In this work we study the quantum effects of SFDM at the cosmological level, to see these effects not only at the galactic scale, but also at the cosmological scale. Using a convenient ansatz, we were able to integrate the perturbed equations to show that the shape of the SFDM halos resembling atoms is a generic result. The main conclusion of this work is that quantum mechanics, the successful microworld theory, could also explain the dark side of the cosmos.

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Cosmological structure formation and soliton phase transition in fuzzy dark matter with axion self-interactions

Mocz

Fialkov

Vogelsberger

et al. 2023

Monthly Notices of the Royal Astronomical Society

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We investigate cosmological structure formation in Fuzzy Dark Matter (FDM) with an attractive self-interaction (SI) with numerical simulations. Such a SI would arise if the FDM boson were an ultra-light axion, which has a strong CP symmetry-breaking scale (decay constant). Although weak, the attractive SI may be strong enough to counteract the quantum ‘pressure’ and alter structure formation. We find in our simulations that the SI can enhance small-scale structure formation, and soliton cores above a critical mass undergo a phase transition, transforming from dilute to dense solitons.

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Nonlinear cosmological structure with ultralight bosons via modified gravity

Cited by 4 publications

References 62 publications

Consistency tests of structure formation simulations of scalar field dark matter

Consistency tests of structure formation simulations of scalar field dark matter

The quantum character of the Scalar Field Dark Matter

Cosmological structure formation and soliton phase transition in fuzzy dark matter with axion self-interactions

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