Results 1 to 10 of about 10,896 (240)
The Astrophysical Journal Supplement SeriesReconstructing the mass density, velocity, and tidal (MTV) fields of dark matter from galaxy surveys is essential for advancing our understanding of the large-scale structure of the Universe.
Feng Shi +12 more
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The Astrophysical Journal LettersWe investigated the alignment between the angular momenta of galaxy groups and the spines of their associated cosmic filaments. Our results demonstrate a significant tendency for these two orientations to be perpendicular, indicating that the rotation of
Yu Rong, Peng Wang, Xiao-xiao Tang
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Recovering Cosmic Structure with a Simple Physical Constraint
The Astrophysical JournalRadio observation of the large-scale structure (LSS) of our Universe faces major challenges from foreground contamination, which is many orders of magnitude stronger than the cosmic signal.
Tian-Cheng Luan +5 more
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The large-scale structure of the universe
, 2016 In this thesis, several theoretical concepts relating to the large-scale structure of the universe are presented. In particular, various aspects of the hierarchical scenario are investigated. The initial perturbation field and its early evolution are discussed in Chapter 3.
McGill, C, McGill, Colin Andrew
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Enhancing Morphological Measurements of the Cosmic Web with Delaunay Tessellation Field Estimation
The Astrophysical Journal Supplement SeriesThe density fields constructed by traditional mass assignment methods are susceptible to irritating discreteness, which hinders morphological measurements of cosmic large-scale structure (LSS) through Minkowski functionals (MFs). To alleviate this issue,
Yu Liu, Yu Yu, Pengjie Zhang, Hao-Ran Yu
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Correlation-based Beam Calibration of 21 cm Intensity Mapping
The Astrophysical Journal Supplement SeriesForeground removal presents a significant obstacle in both current and forthcoming intensity-mapping surveys. While numerous techniques have been developed that show promise in simulated data sets, their efficacy often diminishes when they are applied to
Jiacheng Ding +3 more
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The Cosmic Dance: Observational Detection of Coherent Spin in Galaxy Clusters
The Astrophysical Journal LettersThe spin of galaxy clusters encodes key information about their formation, dynamics, and the influence of large-scale structure. However, whether clusters possess statistically significant spin and how to measure it observationally remain open questions.
Xiao-xiao Tang +4 more
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Luminosity Distance Dispersion in Swiss-cheese Cosmology as a Function of the Hole Size Distribution
The Astrophysical JournalThe luminosity distance–redshift ( D _L – z ) relation derived from Type Ia supernovae (SNe Ia) yields evidence for a nonzero cosmological constant.
T. Cheunchitra +2 more
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Constraining Neutrino Cosmologies with Nonlinear Reconstruction
The Astrophysical JournalNonlinear gravitational evolution induces strong nonlinearities in the observed cosmological density fields, leading to positive off-diagonal correlations in the power spectrum covariance. This has caused the information saturation in the power spectrum,
Shi-Hui Zang, Hong-Ming Zhu
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Joint Analysis of Small-scale Galaxy Clustering and Galaxy–Galaxy Lensing from BOSS Galaxies
The Astrophysical JournalWe present a joint analysis of galaxy clustering and galaxy–galaxy lensing measurements from BOSS galaxies using a simulation-based emulation method combined with a halo occupation distribution model.
Wenhao Gao +10 more
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