Results 41 to 50 of about 431,236 (340)
Prospects for 21 cm Galaxy Cross-correlations with HERA and the Roman High-latitude Survey
The Astrophysical Journal, 2023 The cross-correlation between the 21 cm field and the galaxy distribution is a potential probe of the Epoch of Reionization (EoR). The 21 cm signal traces neutral gas in the intergalactic medium and, on large spatial scales, this should be anticorrelated
Paul La Plante +4 more
doaj +1 more source
Machine-learning Cosmology from Void Properties
The Astrophysical Journal, 2023 Cosmic voids are the largest and most underdense structures in the Universe. Their properties have been shown to encode precious information about the laws and constituents of the Universe.
Bonny Y. Wang +3 more
doaj +1 more source
Impact of ultralight axion self-interactions on the large scale structure of the Universe [PDF]
, 2017 Ultralight axions have sparked attention because their tiny mass m∼10-22 eV, which leads to a kiloparsec-scale de Broglie wavelength comparable to the size of a dwarf galaxy, could alleviate the so-called small-scale crisis of massive cold dark matter ...
V. Desjacques, A. Kehagias, A. Riotto
semanticscholar +1 more source
The Astrophysical Journal, 2023 We present CAMELS-ASTRID, the third suite of hydrodynamical simulations in the Cosmology and Astrophysics with MachinE Learning (CAMELS) project, along with new simulation sets that extend the model parameter space based on the previous frameworks of ...
Yueying Ni +14 more
doaj +1 more source
Searching For Integrated Sachs-Wolfe Effect Beyond Temperature Anisotropies: CMB E-mode Polarization-Galaxy Cross Correlation [PDF]
, 2005 The cross-correlation between cosmic microwave background (CMB) temperature anisotropies and the large scale structure (LSS) traced by the galaxy distribution, or sources at different wavelengths, is now well known.
Alessandro Melchiorri +9 more
core +2 more sources
The Astrophysical Journal Letters, 2023 We report the first constraints on the growth rate of the universe, f ( z ) σ _8 ( z ), with intrinsic alignments (IAs) of galaxies. We measure the galaxy density-intrinsic ellipticity cross-correlation and intrinsic ellipticity autocorrelation functions
Teppei Okumura, Atsushi Taruya
doaj +1 more source
Searching for a dipole modulation in the large-scale structure of the Universe [PDF]
, 2014 Several statistical anomalies in the CMB temperature anisotropies seem to defy the assumption of a homogeneous and isotropic universe. In particular, a dipole modulation has been detected both in WMAP and Planck data. We adapt the methodology proposed by
Balbi, A. +5 more
core +2 more sources
CMBPol Mission Concept Study: Gravitational Lensing [PDF]
, 2008 Gravitational lensing of the cosmic microwave background by large-scale structure in the late universe is both a source of cosmological information and a potential contaminant of primordial gravity waves.
Alan Kogut +22 more
core +3 more sources
Cosmological Information in the Marked Power Spectrum of the Galaxy Field
The Astrophysical Journal, 2023 Marked power spectra are two-point statistics of a marked field obtained by weighting each location with a function that depends on the local density around that point. We consider marked power spectra of the galaxy field in redshift space that up-weight
Elena Massara +8 more
doaj +1 more source
Large-scale Filamentary Structure around the Protocluster at Redshift z=3.1 [PDF]
, 2005 We report the discovery of a large-scale coherent filamentary structure of Lyman alpha emitters in a redshift space at z=3.1. We carried out spectroscopic observations to map the three dimensional structure of the belt-like feature of the Lyman alpha ...
Hajime Tamura +14 more
core +2 more sources