A5005732792- Galaxies: Formation, Evolution, Phenomena
- Cosmology and Gravitation Theories
- Astronomy and Astrophysical Research
- Astrophysics and Cosmic Phenomena
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- Scientific Research and Discoveries
- Stellar, planetary, and galactic studies
- Radio Astronomy Observations and Technology
- SAS software applications and methods
- Geophysics and Gravity Measurements
- Dark Matter and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Ionosphere and magnetosphere dynamics
- Geochemistry and Geologic Mapping
- Reservoir Engineering and Simulation Methods
- Lightning and Electromagnetic Phenomena
- Relativity and Gravitational Theory
- Advanced Differential Geometry Research
- Computational Physics and Python Applications
- Remote Sensing in Agriculture
- Image Processing Techniques and Applications
- Natural Products and Biological Research
- Marine and environmental studies
- Earth Systems and Cosmic Evolution
Zhongshan Hospital
2025
Sun Yat-sen University
2020-2024
Shanghai Jiao Tong University
2024
Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)
2022
Korea Institute for Advanced Study
2018-2021
Institut de Microélectronique, Electromagnétisme et Photonique
2019
Korea Astronomy and Space Science Institute
2015-2019
Wuhan University
2019
Shanghai Astronomical Observatory
2013-2015
This paper reviews the research progress of conductive hydrogel 3D printing for flexible electronics, with emphasis on methods, classification and materials synthesis application fields.
Our current understanding of the Universe is established through pristine measurements structure in cosmic microwave background (CMB) and distribution shapes galaxies tracing large scale (LSS) Universe. One key ingredient that underlies cosmological observables field sources observed assumed to be initially Gaussian with high precision. Nevertheless, a minimal deviation from Gaussianityis perhaps most robust theoretical prediction models explain Universe; itis necessarily present even...
Abstract Shortly after its discovery, General Relativity (GR) was applied to predict the behavior of our Universe on largest scales, and later became foundation modern cosmology. Its validity has been verified a range scales environments from Solar system merging black holes. However, experimental confirmations GR cosmological have so far lacked accuracy one would hope for — applications those being largely based extrapolation there sometimes questioned in shadow discovery unexpected cosmic...
Abstract We investigate the feasibility of using comoving Lagrangian acceleration ( COLA ) technique to efficiently generate galaxy mock catalogs that can accurately reproduce statistical properties observed galaxies. Our proposed scheme combines subhalo abundance-matching (SHAM) procedure with simulations, only three free parameters: scatter magnitude σ scat in SHAM, initial redshift z init simulation, and time stride da used by . In this proof-of-concept study, we focus on a subset BOSS...
A critical requirement of spectroscopic large scale structure analyses is correcting for selection which galaxies to observe from an isotropic target list. This often limited by the hardware used perform survey will impose angular constraints simultaneously observable targets, requiring multiple passes all them. In SDSS this manifested solely as collision physical fibers and plugs placed in plates. DESI, there additional constraint robotic positioner controls each fiber being a finite patrol...
Context. The DESI Legacy Imaging Survey DR9, with its extensive dataset of galaxy locations and photometric redshifts, presents an opportunity to study Baryon Acoustic Oscillations (BAO) in the region covered by ongoing spectroscopic survey. Aims. We aim investigate differences between different parts DR9 footprint. Furthermore, we want measure BAO scale for luminous red galaxies within them. Our selected redshift range 0.6 0.8 corresponds bin which a tension Y1 eBOSS was found. Methods....
The Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Survey DR9 (DR9 hereafter), with its extensive dataset of galaxy locations and photometric redshifts, presents an opportunity to study baryon acoustic oscillations (BAOs) in the region covered by ongoing spectroscopic survey DESI. We aim investigate differences between different parts footprint. Furthermore, we want measure BAO scale for luminous red galaxies within them. Our selected redshift range 0.6 0.8 corresponds bin which...
Massive spectroscopic redshift surveys open a promising window to accurately measure peculiar velocity at cosmological distances through space distortion (RSD). In Paper I Zhang et al. [Phys. Rev. D 87, 063526 (2013)] of this series work, we proposed decomposing into three eigenmodes (${\mathbf{v}}_{\ensuremath{\delta}}$, ${\mathbf{v}}_{S}$, and ${\mathbf{v}}_{B}$) in order facilitate the RSD modeling reconstruction. current paper dark matter RSD-related statistics set N-body simulations....
Abstract The baryonic feedback effect is an important systematic error in the weak lensing (WL) analysis. It contributes partly to S 8 tension literature. With next generations of large scale structure (LSS) and CMB experiments, high signal-to-noise kinetic Sunyaev-Zel'dovich (kSZ) detection can tightly constrain baryon distribution around dark matter halos, quantify statistics. In this work, we apply Fisher matrix technique predict future kSZ constraints on 3 kSZ-sensitive Baryon Correction...
Massive spectroscopic surveys will measure the redshift space distortion (RSD) induced by galaxy peculiar velocity to unprecedented accuracy. We develop a new method improve RSD modeling and carry out robust reconstruction of 3D large scale through surveys, in light RSD. (1) propose mathematically unique physically motivated decomposition into three eigen-components different origins, dependences impacts on (2) This has potential simplify modeling. derive formula for power spectrum. Under...
Abstract We report a ∼5.2 σ detection of the kinetic Sunyaev–Zel’dovich (kSZ) effect in Fourier space, by combining DESI galaxy groups and Planck data. use density-weighted pairwise kSZ power spectrum as summary statistic, detailed procedure its measurement is presented this paper. Meanwhile, we analyze redshift space group density to constrain bias parameters photo- z uncertainties. These best-fitted are substituted nonlinear model, fit measured with model optical depth <?CDATA $\bar{\tau...
In this paper, we set out to construct a of reference mock galaxy redshift surveys (MGRSs) for the future Chinese Space-station Survey Telescope (CSST) observation, where subsequent survey selection effects can be added and evaluated. This MGRSs is generated using dark matter subhalos extracted from high-resolution Jiutian $N$-body simulation standard $\Lambda$CDM cosmogony with $\Omega_m=0.3111$, $\Omega_{\Lambda}=0.6889$, $\sigma_8=0.8102$. The has boxsize $1~h^{-1} {\rm Gpc}$, consists...
Cosmology based on large scale peculiar velocity preferes volume weighted statistics. However, measuring the statistics from inhomogeneously distributed galaxies (simulation particles/halos) suffer an inevitable and significant sampling artifact. We study this artifact in power spectrum measured by nearest-particle (NP) assignment method(Zheng et al. 2013, PRD). derive analytical expression of leading higher order terms. find that suppresses $z=0$ E-mode $\sim 10\%$ at $k=0.1h/$Mpc , for...
Measuring the volume weighted velocity power spectrum suffers from a severe systematic error, due to imperfect sampling of field inhomogeneous distribution dark matter particles/halos in simulations or galaxies with measurement. This "sampling artifact" depends on both mean particle number density $\bar{n}_P$ and intrinsic large scale structure (LSS) fluctuation distribution. (1) We report robust detection this artifact N-body simulations. It causes $\sim 12$% underestimation at $k=0.1$h/Mpc...
A profound assumption in peculiar velocity cosmology is ${b}_{v}=1$ at sufficiently large scales, where ${b}_{v}$ the volume-weighted halo(galaxy) bias with respect to matter field. However, this fundamental has not been robustly verified numerical simulations. Furthermore, it challenged by structure formation theory (Bardeen, Bond, Kaiser and Szalay, Astrophys. J. 304, 15 (1986); Desjacques Sheth, Phys. Rev D 81, 023526 (2010), which predicts existence of (at least for proto-halos) due fact...
We investigate impacts of massive neutrinos on the cosmic velocity fields, employing high-resolution cosmological $N$-body simulations provided by information-optimized CUBE code, where are evolved using collisionless hydrodynamics and their perturbations can be accurately resolved. In this study we focus, for first time, analysis massive-neutrino induced suppression effects in various field components magnitude, divergence, vorticity dispersion. By varying neutrino mass sum $M_\nu$ from 0...
The mapping of dark matter clustering from real space to redshift introduces the anisotropic property measured density power spectrum in space, known as distortion effect. formula is intrinsically non-linear, which complicated by higher order polynomials due indefinite cross correlations between and velocity fields, Finger-of-God effect randomness peculiar field. Whilst full remain unknown, other systematics can be controlled consistently within same truncation expansion formula, shown this...
The redshift-space distortion (RSD) in the observed distribution of galaxies is known as a powerful probe cosmology. Observations large-scale RSD have given tight constraints on linear growth rate structures universe. On other hand, small-scale RSD, caused by galaxy random motions inside clusters, has not been much used cosmology, but also cosmological information because universes with different parameters halo mass functions and virialized velocities. We focus projected correlation...
We report a $5\sigma$ detection of the pairwise kinematic Sunyaev-Zel'dovich (kSZ) effect, combining galaxy clusters in DESI imaging surveys and Planck temperature maps. The is facilitated by both improvements data analysis method. For data, we adopt recently released group catalog (Y20: \cite{yang2020extended}) with $\sim 10^6$ robustly-identified groups, construct various cluster samples for kSZ measurement. Y20 catalogue also provides estimation halo mass, which further improves...
Abstract We develop an improved Alcock–Paczynski (AP) test method that uses the redshift-space two-point correlation function (2pCF) of galaxies. Cosmological constraints can be obtained by examining redshift dependence normalized 2pCF, which should not change apart from expected small nonlinear evolution. An incorrect choice cosmology used to convert comoving distance will manifest itself as redshift-dependent 2pCF. Our decomposes difference two-dimensional into Legendre polynomials whose...
Large-scale cosmic filaments may have played an important role in shaping the properties of galaxies. Meanwhile, are believed to harbor a substantial portion missing baryons at redshift z < 2. To inspect these issues, many need be examined, including their lengths, thicknesses, and density profiles. However, measuring some poses challenges. This study concentrates on estimating filament width/thickness, investigating potential correlations between local width dark matter halos within...
Abstract A long-standing issue in peculiar velocity cosmology is whether the halo/galaxy bias b v = 1 at large scale. The resolution of this important must resort to high-precision cosmological simulations. However, hampered by another “sampling artifact” problem volume-weighted measurement. We circumvent with a hybrid approach. first measure statistics free sampling artifacts, then link them theory, and finally solve for bias. (determined our method) not only artifacts but also cosmic...
Both multi-streaming (random motion) and bulk motion cause the Finger-of-God (FoG) effect in redshift space distortion (RSD). We apply a direct measurement of RSD from simulations, proving that it induces an additional, non-negligible FoG damping to density power spectrum. show that, including effect, modelling is significantly improved. also provide theoretical explanation based on halo model for measured fitting formula with one two free parameters. The improved understanding helps break...