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Artykuły w czasopismach na temat „Ultra Light Axion Dark Matter (ULADM)”

Autor: Grafiati
Data publikacji: 6 września 2023

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Sprawdź 16 najlepszych artykułów w czasopismach naukowych na temat „Ultra Light Axion Dark Matter (ULADM)”.

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1

Chakrabarti, Sayan, Bihag Dave, Koushik Dutta, and Gaurav Goswami. "Constraints on the mass and self-coupling of ultra-light scalar field dark matter using observational limits on galactic central mass." Journal of Cosmology and Astroparticle Physics 2022, no. 09 (2022): 074. http://dx.doi.org/10.1088/1475-7516/2022/09/074.

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Abstract It is well known that Ultra-Light Dark Matter (ULDM), usually scalar fields of mass m ∼ 10-22 eV, can solve some of the outstanding problems of the Cold Dark Matter (CDM) paradigm. Such a scalar field could have non-negligible self-coupling λ. In this work, using the known observational upper limit on the amount of centrally concentrated dark matter in a galaxy, we arrive at the observational constraints in the λ-m (self coupling-mass) parameter space. It is found that the observational limit on the mass m of the ULDM depends upon the sign and strength of the self-interactions. We dem
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Lee, Jae-Weon. "Brief History of Ultra-light Scalar Dark Matter Models." EPJ Web of Conferences 168 (2018): 06005. http://dx.doi.org/10.1051/epjconf/201816806005.

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This is a review on the brief history of the scalar field dark matter model also known as fuzzy dark matter, BEC dark matter, wave dark matter, or ultra-light axion. In this model ultra-light scalar dark matter particles with mass m = O(10-22)eV condense in a single Bose-Einstein condensate state and behave collectively like a classical wave. Galactic dark matter halos can be described as a self-gravitating coherent scalar field configuration called boson stars. At the scale larger than galaxies the dark matter acts like cold dark matter, while below the scale quantum pressure from the uncerta
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Sabiu, Cristiano G., Kenji Kadota, Jacobo Asorey, and Inkyu Park. "Probing ultra-light axion dark matter from 21 cm tomography using Convolutional Neural Networks." Journal of Cosmology and Astroparticle Physics 2022, no. 01 (2022): 020. http://dx.doi.org/10.1088/1475-7516/2022/01/020.

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Abstract We present forecasts on the detectability of Ultra-light axion-like particles (ULAP) from future 21 cm radio observations around the epoch of reionization (EoR). We show that the axion as the dominant dark matter component has a significant impact on the reionization history due to the suppression of small scale density perturbations in the early universe. This behavior depends strongly on the mass of the axion particle. Using numerical simulations of the brightness temperature field of neutral hydrogen over a large redshift range, we construct a suite of training data. This data is u
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Berman, Gennady P., Vyacheslav N. Gorshkov, and Vladimir I. Tsifrinovich. "Axionic dark matter halos in the gravitational field of baryonic matter." Modern Physics Letters A 35, no. 26 (2020): 2050248. http://dx.doi.org/10.1142/s021773232050248x.

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We consider a dark matter halo (DMH) of a spherical galaxy as a Bose–Einstein condensate (BEC) of the ultra-light axions (ULA) interacting with the baryonic matter. In the mean-field (MF) limit, we have derived the integro-differential equation of the Hartree–Fock type for the spherically symmetrical wave function of the DMH component. This equation includes two independent dimensionless parameters: (i) [Formula: see text] is the ratio of baryon and axion total mases and (ii) [Formula: see text] is the ratio of characteristic baryon and axion spatial parameters. We extended our “dissipation al
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Berman, Gennady P., Vyacheslav N. Gorshkov, Vladimir I. Tsifrinovich, Marco Merkli, and Xidi Wang. "Bose–Einstein condensate of ultra-light axions as a candidate for the dark matter galaxy halos." Modern Physics Letters A 34, no. 30 (2019): 1950361. http://dx.doi.org/10.1142/s0217732319503619.

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We suggest that the dark matter halo in some of the spiral galaxies can be described as the ground state of the Bose–Einstein condensate of ultra-light self-gravitating axions. We have also developed an effective “dissipative” algorithm for the solution of nonlinear integro-differential Schrödinger equation describing self-gravitating Bose–Einstein condensate. The mass of an ultra-light axion is estimated.
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POLLOCK, M. D. "IS NEUTRALINO DARK MATTER POSSIBLE IN THE SUPERSTRING THEORY?" International Journal of Modern Physics D 13, no. 05 (2004): 819–30. http://dx.doi.org/10.1142/s0218271804004797.

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In the heterotic superstring theory, the decay constant of the QCD axion lies within the range 3×1016≲fa GeV ≲1018, the lower limit referring to the model-independent axion, while the upper limit is due to dimension-five, non-renormalizable effects first calculated by Cvetič. Consequently, the neutralino χ0, assumed to be a nearly pure B-ino, decays into the axino ã on the time scale obtained by Covi et al., [Formula: see text], which is ≲10-3 times the age of the Universe t0≈4×1017 s , but can only be made less than the time t≈1 s of the onset of Big-Bang nucleosynthesis by revising mχ0 to an
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Castillo, Andrés, Jorge Martin-Camalich, Jorge Terol-Calvo, et al. "Searching for dark-matter waves with PPTA and QUIJOTE pulsar polarimetry." Journal of Cosmology and Astroparticle Physics 2022, no. 06 (2022): 014. http://dx.doi.org/10.1088/1475-7516/2022/06/014.

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Abstract The polarization of photons emitted by astrophysical sources might be altered as they travel through a dark matter medium composed of ultra light axion-like particles (ALPs). In particular, the coherent oscillations of the ALP background in the galactic halo induce a periodic change on the polarization of the electromagnetic radiation emitted by local sources such as pulsars. Building up on previous works, we develop a new, more robust, analysis based on the generalised Lomb-Scargle periodogram to search for this periodic signal in the emission of the Crab supernova remnant observed b
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Kawasaki, Masahiro, Kazuyoshi Miyazaki, Kai Murai, Hiromasa Nakatsuka, and Eisuke Sonomoto. "Anisotropies in cosmological 21 cm background by oscillons/I-balls of ultra-light axion-like particle." Journal of Cosmology and Astroparticle Physics 2022, no. 08 (2022): 066. http://dx.doi.org/10.1088/1475-7516/2022/08/066.

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Abstract Ultra-light axion-like particle (ULAP) with mass m ∼ 10-22 eV has recently been attracting attention as a possible solution to the small-scale crisis. ULAP forms quasi-stable objects called oscillons/I-balls, which can survive up to a redshift z ∼ 10 and affect the structure formation on a scale ∼ 𝒪(0.1) Mpc by amplifying the density fluctuations. We study the effect of oscillons on 21 cm anisotropies caused by neutral hydrogen in minihalos. It is found that this effect can be observed in a wide mass range by future observations such as Square Kilometer Array (SKA) if the fraction of
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9

Rogers, Keir K., Renée Hložek, Alex Laguë, et al. "Ultra-light axions and the S 8 tension: joint constraints from the cosmic microwave background and galaxy clustering." Journal of Cosmology and Astroparticle Physics 2023, no. 06 (2023): 023. http://dx.doi.org/10.1088/1475-7516/2023/06/023.

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Abstract We search for ultra-light axions as dark matter (DM) and dark energy particle candidates, for axion masses 10-32 eV ≤ m a ≤ 10-24 eV, by a joint analysis of cosmic microwave background (CMB) and galaxy clustering data — and consider if axions can resolve the tension in inferred values of the matter clustering parameter S 8. We give legacy constraints from Planck 2018 CMB data, improving 2015 limits on the axion density Ωa h 2 by up to a factor of three; CMB data from the Atacama Cosmology Telescope and the South Pole Telescope marginally weaken Planck bounds at m a = 10-25 eV, owing t
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10

Gong, Yan, Bin Yue, Ye Cao, and Xuelei Chen. "Fuzzy Dark Matter as a Solution to Reconcile the Stellar Mass Density of High-z Massive Galaxies and Reionization History." Astrophysical Journal 947, no. 1 (2023): 28. http://dx.doi.org/10.3847/1538-4357/acc109.

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Abstract The JWST early release data show unexpected high stellar mass densities of massive galaxies at 7 < z < 11. A high star formation efficiency is probably needed to explain this. However, such a high star formation efficiency would greatly increase the number of ionizing photons, which would be in serious conflict with current cosmic microwave background (CMB) and other measurements of cosmic reionization history. To solve this problem, we explore fuzzy dark matter (FDM), which is composed of ultra-light scalar particles, e.g., ultra-light axions, and calculate its halo mass functi
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11

Ivanov, M. M., Y. Y. Kovalev, M. L. Lister, et al. "Constraining the photon coupling of ultra-light dark-matter axion-like particles by polarization variations of parsec-scale jets in active galaxies." Journal of Cosmology and Astroparticle Physics 2019, no. 02 (2019): 059. http://dx.doi.org/10.1088/1475-7516/2019/02/059.

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12

Ferreira, Elisa G. M. "Ultra-light dark matter." Astronomy and Astrophysics Review 29, no. 1 (2021). http://dx.doi.org/10.1007/s00159-021-00135-6.

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AbstractUltra-light dark matter is a class of dark matter models (DM), where DM is composed by bosons with masses ranging from $$10^{-24}\, \mathrm {eV}< m < \mathrm {eV}$$ 10 - 24 eV < m < eV . These models have been receiving a lot of attention in the past few years given their interesting property of forming a Bose–Einstein condensate (BEC) or a superfluid on galactic scales. BEC and superfluidity are some of the most striking quantum mechanical phenomena that manifest on macroscopic scales, and upon condensation, the particles behave as a single coherent state, described by the
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13

Laroche, Alexander, Daniel Gilman, Xinyu Li, Jo Bovy, and Xiaolong Du. "Quantum fluctuations masquerade as haloes: Bounds on ultra-light dark matter from quadruply-imaged quasars." Monthly Notices of the Royal Astronomical Society, September 22, 2022. http://dx.doi.org/10.1093/mnras/stac2677.

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Abstract Ultra-light dark matter (ULDM) refers to a class of theories, including ultra-light axions, in which particles with mass $m_{\psi } < 10^{-20}\, \rm {eV}$ comprise a significant fraction of the dark matter. A galactic scale de Broglie wavelength distinguishes these theories from cold dark matter (CDM), suppressing the overall abundance of structure on sub-galactic scales, and producing wave-like interference phenomena in the density profiles of haloes. With the aim of constraining the particle mass, we analyse the flux ratios in a sample of eleven quadruple-image strong gravita
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14

Chakrabarti, Soumya. "Collapse of an axion scalar field." European Physical Journal C 81, no. 2 (2021). http://dx.doi.org/10.1140/epjc/s10052-021-08930-2.

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AbstractThe manuscript deals with an interacting scalar field that mimics the evolution of the so-called axion scalar dark matter or axion like particles with ultra-light masses. It is discussed that such a scalar along with an ordinary fluid description can collapse under strong gravity. The end state of the collapse depends on how the axion interacts with geometry and ordinary matter. For a self-interacting axion and an axion interacting with geometry the collapse may lead to a zero proper volume singularity or a bounce and total dispersal of the axion. However, for an axion interacting with
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15

Montero, Miguel, Julian B. Muñoz, and Georges Obied. "Swampland bounds on dark sectors." Journal of High Energy Physics 2022, no. 11 (2022). http://dx.doi.org/10.1007/jhep11(2022)121.

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Abstract We use Swampland principles to theoretically disfavor regions of the parameter space of dark matter and other darkly charged particles that may exist. The Festina Lente bound, the analogue of the Weak-Gravity conjecture in de Sitter, places constraints on the mass and charge of dark particles, which here we show cover regions in parameter space that are currently allowed by observations. As a consequence, a broad set of new ultra-light particles are in the Swampland, independently of their cosmic abundance, showing the complementarity of Quantum Gravity limits with laboratory and astr
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Mocz, Philip, Anastasia Fialkov, Mark Vogelsberger, et al. "Cosmological structure formation and soliton phase transition in Fuzzy Dark Matter with axion self-interactions." Monthly Notices of the Royal Astronomical Society, March 6, 2023. http://dx.doi.org/10.1093/mnras/stad694.

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Abstract 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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