Search Results - "Lague, Alex"
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1
Intensity mapping as a probe of axion dark matter
Published in Monthly notices of the Royal Astronomical Society (01-01-2021)“…ABSTRACT We consider intensity mapping (IM) of neutral hydrogen (H i) in the redshift range 0 ≲ z ≲ 3 employing a halo model approach where H i is assumed to…”
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2
Fuzzy dark matter and the Dark Energy Survey Year 1 data
Published in Monthly notices of the Royal Astronomical Society (19-08-2022)“…ABSTRACT Gravitational weak lensing by dark matter haloes leads to a measurable imprint in the shear correlation function of galaxies. Fuzzy dark matter (FDM),…”
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Evolving ultralight scalars into non-linearity with Lagrangian perturbation theory
Published in Monthly notices of the Royal Astronomical Society (01-06-2021)“…ABSTRACT Many models of high energy physics suggest that the cosmological dark sector consists of not just one, but a spectrum of ultralight scalar particles…”
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4
Fuzzy dark matter and the Dark Energy Survey Year 1 data
Published in Monthly notices of the Royal Astronomical Society (25-07-2022)“…Gravitational weak lensing by dark matter haloes leads to a measurable imprint in the shear correlation function of galaxies. Fuzzy dark matter (FDM), composed…”
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5
Ultralight Axions and the Cosmic Web
Published 01-01-2022“…The ΛCDM model suggests that most of the mass in our Universe is composed of dark matter of unknown origin. Among the most promising dark matter candidates are…”
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Dissertation -
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The Atacama Cosmology Telescope: DR6 Gravitational Lensing Map and Cosmological Parameters
Published 12-08-2024“…The Astrophysical Journal, Volume 962, 2024, Page 113 We present cosmological constraints from a gravitational lensing mass map covering 9400 sq. deg…”
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The Atacama Cosmology Telescope: A Measurement of the DR6 CMB Lensing Power Spectrum and its Implications for Structure Growth
Published 11-04-2023“…We present new measurements of cosmic microwave background (CMB) lensing over $9400$ sq. deg. of the sky. These lensing measurements are derived from the…”
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8
Prospects and Limitations for Constraining Light Relics with Primordial Abundance Measurements
Published 23-09-2019“…Phys. Rev. D 101, 043509 (2020) The light relic density affects the thermal and expansion history of the early Universe leaving a number of observable…”
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Constraints on local primordial non-Gaussianity with 3d Velocity Reconstruction from the Kinetic Sunyaev-Zeldovich Effect
Published 12-11-2024“…The cosmic velocity field is an unbiased probe of the total matter distribution but is challenging to measure directly at intermediate and high redshifts. The…”
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10
Constraints on Dark Matter-Dark Energy Scattering from ACT DR6 CMB Lensing
Published 12-02-2024“…The predicted present-day amplitude of matter fluctuations based on cosmic microwave background (CMB) anisotropy data has sometimes been found discrepant with…”
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Improved Halo Model Calibrations for Mixed Dark Matter Models of Ultralight Axions
Published 17-09-2024“…We study the implications of relaxing the requirement for ultralight axions to account for all dark matter in the Universe by examining mixed dark matter (MDM)…”
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Cosmological simulations of mixed ultralight dark matter
Published 30-10-2023“…The era of precision cosmology allows us to test the composition of the dark matter. Mixed ultralight or fuzzy dark matter (FDM) is a cosmological model with…”
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13
Improved Mixed Dark Matter Halo Model for Ultralight Axions
Published 24-02-2023“…Phys.Rev.D 107 (2023) 6, 063526 We present a complete halo model for mixed dark matter composed of cold dark matter (CDM) and ultralight axion-like particles…”
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14
Fuzzy Dark Matter and the Dark Energy Survey Year 1 Data
Published 26-08-2022“…Gravitational weak lensing by dark matter halos leads to a measurable imprint in the shear correlation function of galaxies. Fuzzy dark matter (FDM), composed…”
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Journal Article -
15
Ultra-light axions and the $S_8$ tension: joint constraints from the cosmic microwave background and galaxy clustering
Published 19-01-2023“…JCAP 06 (2023) 023 We search for ultra-light axions as dark matter (DM) and dark energy particle candidates, for axion masses $10^{-32}\,\mathrm{eV} \leq…”
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16
The Atacama Cosmology Telescope: Large-scale velocity reconstruction with the kinematic Sunyaev--Zel'dovich effect and DESI LRGs
Published 08-10-2024“…The kinematic Sunyaev--Zel'dovich (kSZ) effect induces a non-zero density-density-temperature bispectrum, which we can use to reconstruct the large-scale…”
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17
Intensity Mapping as a Probe of Axion Dark Matter
Published 19-12-2020“…MNRAS 500.3, 3162 (2021) Intensity mapping (IM) of spectral lines has the potential to revolutionize cosmology by increasing the total number of observed modes…”
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Journal Article -
18
Constraining Ultralight Axions with Galaxy Surveys
Published 11-06-2021“…Ultralight axions and other bosons are dark matter candidates present in many high energy physics theories beyond the Standard Model. In particular, the string…”
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19
Evolving Ultralight Scalars into Non-Linearity with Lagrangian Perturbation Theory
Published 17-04-2020“…Many models of high energy physics suggest that the cosmological dark sector consists of not just one, but a spectrum of ultralight scalar particles with…”
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Journal Article -
20
Cosmic Microwave Background Spectral Distortions from Cosmic String Loops
Published 28-10-2015“…JCAP 2 047 (2016) Cosmic string loops contain cusps which decay by emitting bursts of particles. A significant fraction of the released energy is in the form…”
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Journal Article