Dark matter distribution induced by a cosmic string wake in the nonlinear regime

Cunha, Disrael Camargo Neves da; Harnois-Déraps, Joachim; Brandenberger, Robert H.; Amara, Adam; Réfrégier, Alexandre

doi:10.1103/physrevd.98.083015

Cited by 15 publications

(9 citation statements)

References 64 publications

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“…Gravity The universal gravitational effects of cosmic strings are probed via a variety of effects on the cosmic microwave background [401][402][403][404][405][406][407] and cosmological probes have produced limits [408][409][410][411][412][413][414][415] that are close to probing GUT-scale strings. There is a large body of work on searching for cosmic strings, but for now we just note they may also also be probed by gravitational wave searches [416][417][418][419][420][421][422][423][424] and large-scale structure [425][426][427], and even in 21 cm experiments [428], among other ideas. We refer to the recent review [168] for further discussion.…”

Section: E Rate Estimate and Signaturesmentioning

confidence: 99%

A Cosmological Lithium Solution from Discrete Gauged Baryon Minus Lepton Number

Koren¹

2022

Preprint

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We propose the infrared gauge symmetry of our sector includes an unbroken discrete gauged subgroup of baryon minus lepton number of order 2 × 3 colors × 3 generations. We UV complete this at a scale Λ as the familiar U (1) B−NcL Abelian Higgs theory, and the early universe phase transition forms cosmic strings which are charged under an emergent higher-form generalized symmetry. These topological defects catalyze interactions which turn 3 baryons into 3 leptons at strong scale rates in an analogue of the Callan-Rubakov effect.The cosmological lithium problem-that the observed primordial abundance is lower than theoretical expectations by a factor of a few-is perhaps the most statistically significant anomaly of SM + ΛCDM, and has resisted decades of attempts by cosmologists, nuclear physicists, and astronomers alike to root out systematics. We write down a model in which B − N c L strings superconduct bosonic global baryon plus lepton number currents and catalyze solely 3p + → 3e + . We suggest that such cosmic strings have disintegrated O(1) of the lithium nuclei formed during Big Bang Nucleosynthesis and estimate the rate, with our benchmark model finding Λ ∼ 10 8 GeV gives the right number density of strings. Figure 0: Photo of a commissioned abstract artist's impression in acrylic on canvas by Bailey Lingen, a Chicago-based artist and trans rights activist who produces music under the name LiTHiUM THiEF.

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Section: E Rate Estimate and Signaturesmentioning

confidence: 99%

A Cosmological Lithium Solution from Discrete Gauged Baryon Minus Lepton Number

Koren¹

2022

Preprint

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“…In a recent paper [11] (see also [12]) we began a study of the dark matter distribution induced by string wakes [13][14][15][16] inserted at z = 31, using a simulation box of lateral size L = 64M pc/h and np = 512 particles per dimension. We found that the string signals for a wake with a string tension of Gµ = 10 −7 can be identified down to a redshift of z ≥ 10.…”

Section: Jcap06(2020)016mentioning

confidence: 99%

“…A method used to extract the wake signal from the dark matter distribution was presented in [11] and can be summarized as follows: for any direction of the sphere, we consider an associated projection axis passing through the origin of the box. We then consider slices of the simulation box perpendicular to that axis at each point x of this axis with thickness given by the grid size of the simulation, and we compute the mass density δ(x) of dark matter particles in that slice as a function of x.…”

Section: Jcap06(2020)016mentioning

confidence: 99%

Signature of a cosmic string wake at z=3

Cunha¹

2020

J. Cosmol. Astropart. Phys.

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In this paper, we describe the results of N-body simulation runs, which include a cosmic string wake of tension Gμ= 4 × 10−8 on top of the usual Λ CDM fluctuations. To obtain a higher resolution of the wake in the simulations compared to previous work, we insert the effects of the string wake at a lower redshift and perform the simulations in a smaller volume. A curvelet analysis of the wake and no-wake maps is applied, indicating that the presence of a wake can be extracted at a three-sigma confidence level from maps of the two-dimensional dark matter projection down to a redshift of z=3.

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“…So the accuracy of their numerical CWTs can be verified by the corresponding analytical results. Finally, it should be noted that the CWT for 1D signals is not trivial in astrophysics and cosmology, as it is also applicable to a wide range of scenarios, such as analyzing the light curves of astronomical sources (e.g., Tarnopolski et al 2020;Ren et al 2022), subtracting the foreground emission from the 21 cm signal (e.g., Gu et al 2013;Li et al 2019), measuring the smallscale structure in the Lyman-α forest (e.g., Lidz et al 2010;Garzilli et al 2012;Wolfson et al 2021), investigating the time-frequency properties of the gravitational waves (e.g., Tary et al 2018), characterizing the 1D density fields (e.g., da Cunha et al 2018;Wang & He 2021;, and so on. We publicly release the Fortran 95 implementation of the fast CWT algorithms described in this manuscript 1 , in the hope that the community will use them to perform wavelet analysis of 1D signals.…”

Section: Introductionmentioning

confidence: 99%

Comparisons between fast algorithms for the continuous wavelet transform and applications in cosmology: the one-dimensional case

Wang¹,

He²

2023

Preprint

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The continuous wavelet transform (CWT) is very useful for processing signals with intricate and irregular structures in astrophysics and cosmology. It is crucial to propose precise and fast algorithms for the CWT. In this work, we review and compare four different fast CWT algorithms for the 1D signals, including the FFTCWT, the V97CWT, the M02CWT, and the A19CWT. The FFTCWT algorithm implements the CWT using the Fast Fourier Transform (FFT) with a computational complexity of O(N log 2 N ) per scale. The rest algorithms achieve the complexity of O(N ) per scale by simplifying the CWT into some smaller convolutions. We illustrate explicitly how to set the parameters as well as the boundary conditions for them. To examine the actual performance of these algorithms, we use them to perform the CWT of signals with different wavelets. From the aspect of accuracy, we find that the FFTCWT is the most accurate algorithm, though its accuracy degrades a lot when processing the non-periodic signal with zero boundaries. The accuracy of O(N ) algorithms is robust to signals with different boundaries, and the M02CWT is more accurate than the V97CWT and A19CWT. From the aspect of speed, the O(N ) algorithms do not show an overall speed superiority over the FFTCWT at sampling numbers of N 10 6 , which is due to their large leading constants. Only the speed of the V97CWT with real wavelets is comparable to that of the FFTCWT. However, both the FFTCWT and V97CWT are substantially less efficient in processing the non-periodic signal because of zero padding. Finally, we conduct wavelet analysis of the 1D density fields, which demonstrate the convenience and power of techniques based on the CWT. We publicly release our CWT codes as resources for the community.

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Dark matter distribution induced by a cosmic string wake in the nonlinear regime

Abstract: The version presented here may differ from the published version or from the version of the record. Please see the repository URL above for details on accessing the published version and note that access may require a subscription.

Cited by 15 publications

References 64 publications

A Cosmological Lithium Solution from Discrete Gauged Baryon Minus Lepton Number

A Cosmological Lithium Solution from Discrete Gauged Baryon Minus Lepton Number

Signature of a cosmic string wake at z=3

Comparisons between fast algorithms for the continuous wavelet transform and applications in cosmology: the one-dimensional case

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