A5100428101- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Adaptive optics and wavefront sensing
- Cosmology and Gravitation Theories
- Gamma-ray bursts and supernovae
- Dark Matter and Cosmic Phenomena
- CCD and CMOS Imaging Sensors
- Astrophysical Phenomena and Observations
- Laser-Matter Interactions and Applications
- Radio Astronomy Observations and Technology
- Solar and Space Plasma Dynamics
- Astrophysics and Cosmic Phenomena
- Solid State Laser Technologies
- Scientific Research and Discoveries
- Advanced Fiber Laser Technologies
- Atomic and Molecular Physics
- Black Holes and Theoretical Physics
- Astronomical Observations and Instrumentation
- stochastic dynamics and bifurcation
- Advanced Harmonic Analysis Research
- Laser-Plasma Interactions and Diagnostics
- Plant Water Relations and Carbon Dynamics
- Quantum Electrodynamics and Casimir Effect
- Ionosphere and magnetosphere dynamics
National Astronomical Observatories
2016-2025
University of Chinese Academy of Sciences
2013-2025
Chinese Academy of Sciences
2016-2025
First Affiliated Hospital of Gannan Medical University
2025
National Engineering Research Center for Information Technology in Agriculture
2025
Heilongjiang University
2025
Wuhan Institute of Technology
2025
Institute of Zoology
2023-2025
Beijing Normal University
2008-2024
Shenzhen Institutes of Advanced Technology
2022-2024
Abstract. The changes in streamflow and sediment discharge the middle reaches of Yellow River are a focus. In this paper, based on precipitation, series data (1950–2008), variation its impact precipitation/response to human activities have been analysis. results show that significant decreasing trends annual existed since late 1950s (P = 0.01). Change-point analyses further revealed transition years abrupt decline began 1985 1981, respectively, 0.05). Adoption conservation measures 1980s...
Abstract The Chinese Space Station Optical Survey (CSS-OS) is a planned full sky survey operated by the Telescope (CSST). It can simultaneously perform photometric imaging and spectroscopic slitless surveys, will probe weak strong gravitational lensing, galaxy clustering, individual galaxies clusters, active galactic nucleus, so on. aims to explore properties of dark matter energy other important cosmological problems. In this work, we focus on two main CSS-OS scientific goals, i.e., lensing...
Testicular aging is associated with declining reproductive health, but the molecular mechanisms are unclear. Here we generate a dataset of 214,369 single-cell transcriptomes from testicular cells 35 individuals aged 21–69, offering resource for studying and physiology. Machine learning analysis reveals stronger response in somatic compared to germ cells. Two waves aging-related changes identified: first peritubular donors their 30s, marked by increased basement membrane thickness, indicating...
The kinematics of satellite galaxies reflect the masses extended dark matter haloes in which they orbit, and thus shed light on mass-luminosity relation (MLR) their corresponding central galaxies. In this paper we select a large sample centrals satellites from Sloan Digital Sky Survey (SDSS) measure (velocity dispersions) as function $r$-band luminosity Using analytical framework presented Paper I, use these data to infer {\it both} mean scatter MLR galaxies, carefully taking account...
Galaxy clustering and galaxy-galaxy lensing probe the connection between galaxies their dark matter haloes in complementary ways. On one hand, halo occupation statistics inferred from observed properties of are degenerate with adopted cosmology. Consequently, different cosmologies imply mass-to-light ratios for haloes. other yields direct constraints on actual it can be used to break this degeneracy, thus constrain cosmological parameters. In paper we establish link galaxy luminosity mass...
We perform full spectrum fitting stellar population analysis and Jeans Anisotropic modelling of the kinematics for about 2000 early-type galaxies (ETGs) spiral from MaNGA DR14 sample. Galaxies with different morphologies are found to be located on a remarkably tight mass plane which is close prediction virial theorem, extending previous results ETGs. By examining an inclined projection ('the mass–size' plane), we find that occupy regions plane, their properties (i.e. age, metallicity,...
We present a study on the stellar age and metallicity distributions for 1105 galaxies using starlight software MaNGA (Mapping Nearby Galaxies at APO) integral field spectra. derive gradients by fitting straight lines to radial profiles, explore their correlations with total mass M*, NUV − r colour environments, as identified both large-scale structure (LSS) type local density. find that mean are close zero but slightly negative, which is consistent inside-out formation scenario. Within our...
ABSTRACT This is the first paper in our series on combined analysis of Dynamics and stellar Population (DynPop) for MaNGA survey final SDSS Data Release 17 (DR17). Here, we present a catalogue dynamically determined quantities over 10 000 nearby galaxies based integral-field kinematics from survey. The dynamical properties are extracted using axisymmetric Jeans Anisotropic Modelling (JAM) method, which was previously shown to be most accurate this kind study. We assess systematic...
ABSTRACT The distribution of mass in galaxy-scale strong gravitational lenses is often modelled as an elliptical power-law plus ‘external shear’, which notionally accounts for neighbouring galaxies and cosmic shear along our line sight. A small amount external could come from these sources, but we show that the vast majority does not. Except a handful rare systems, best-fitting values do not correlate with independent measurements line-of-sight shear: weak lensing 45 Hubble Space Telescope...
We derived constraints on cosmological parameters using weak lensing peak statistics measured the $\sim130~{\rm deg}^2$ of Canada-France-Hawaii Telescope Stripe 82 Survey (CS82). This analysis demonstrates feasibility in studies. For our measurements, we considered peaks with signal-to-noise ratio range $\nu=[3,6]$. a flat $\Lambda$CDM model only $(\Omega_{\rm m}, \sigma_8)$ as free parameters, constrained following relation $\Sigma_8=\sigma_8(\Omega_{\rm m}/0.27)^{\alpha}$ to be:...
The cold dark matter (CDM) cosmological model unambigously predicts that a large number of haloes should survive as subhaloes when they are accreted into larger halo. CDM would be ruled out if such substructures were shown not to exist. By contrast, the consists warm particles (WDM), then below threshold mass depends on particle far fewer present. Finding certain rule masses some value. Strong gravitational lensing provides clean method measure subhalo function through distortions in...
We study the properties of 66 galaxies with kinematically misaligned gas and stars from MaNGA survey. The fraction varies galaxy physical parameters, i.e. M*, SFR sSFR. According to their sSFR, we further classify these into three categories, 10 star-forming, 26 "Green Valley" 30 quiescent ones. different types are in that star-forming ones have positive gradient D4000 higher gas-phase metallicity, while green valley/quiescent negative gradients lower metallicity on average. There is...
The Chinese Space Station Optical Survey (CSS-OS) is a major science project of the Application System China Manned Program. This survey planned to perform both photometric imaging and slitless spectroscopic observations, it will focus on different cosmological astronomical goals. Most these goals are tightly dependent accuracy redshift (photo-z) measurement, especially for weak gravitational lensing as main driver. In this work, we assess if current filter definition can provide accurate...
Strong gravitational lensing, which can make a background source galaxy appears multiple times due to its light rays being deflected by the mass of one or more foreground lens galaxies, provides astronomers with powerful tool study dark matter, cosmology and most distant Universe.PyAutoLens is an open-source Python 3.6+ package for strong core features including fully automated modeling galaxies clusters, support direct imaging interferometer datasets comprehensive tools simulating samples...
Abstract The human gut microbiome has been extensively explored, while the archaeal viruses remain largely unknown. Here, we present a comprehensive analysis of from metagenomes and existing virus collections using CRISPR spacer viral signature-based approach. This results in 1279 species, which, 95.2% infect Methanobrevibacteria_A , 56.5% shared high identity (>95%) with proviruses, 37.2% have host range across 55.7% are highly prevalent population (>1%). A methanogenic virus-specific...
Observations suggest that the dark matter and stars in early-type galaxies `conspire' to produce a surprisingly simple distribution of total mass, $\rho(r)\propto\rho^{-\gamma}$, with $\gamma\approx2$. We measure mass 48 gravitationally lens resolved background source. By fitting source light every pixel images from Hubble Space Telescope, we find mean $\langle\gamma\rangle=2.075_{-0.024}^{+0.023}$ intrinsic scatter between $\sigma_\gamma=0.172^{+0.022}_{-0.032}$ for overall sample. This is...
ABSTRACT This is the second paper of Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) Dynamics and stellar Population (DynPop) series, which analyses global population, radial gradients, non-parametric star-formation history ∼10K galaxies from MaNGA Survey final data release 17 relates them with dynamical properties galaxies. We confirm correlation between population velocity dispersion σe, but also find that younger are more metal-poor fixed σe. Stellar age, metallicity,...
The defining characteristic of the cold dark matter (CDM) hypothesis is presence a very large number low-mass haloes, too small to have made visible galaxy. Other hypotheses for nature matter, such as warm (WDM), predict much smaller haloes. Strong lensing systems offer possibility detecting small-mass haloes through distortions they induce in lensed image. Here we show that main contribution image comes from along line sight rather than subhaloes lens has normally been assumed so far. These...
We assess the effectiveness of Jeans-Anisotropic-MGE (JAM) technique with a state-of-the-art cosmological hydrodynamic simulation, Illustris project. perform JAM modelling on 1413 simulated galaxies stellar mass M^* > 10^{10}M_{sun}, and construct an axisymmetric dynamical model for each galaxy. Combined Markov Chain Monte Carlo (MCMC) we recover projected root-mean-square velocity (V_rms) field component, investigate constraints mass-to-light ratio, M^*/L, fraction dark matter f_{DM} within...
Abstract We perform Jeans anisotropic modeling (JAM) on elliptical and spiral galaxies from the MaNGA DR13 sample. By comparing stellar mass-to-light ratios estimated population synthesis JAM, we find a systematic variation of initial mass function (IMF) similar to that in earlier <?CDATA ${\mathrm{ATLAS}}^{3{\rm{D}}}$?> results. Early-type (elliptical lenticular) with lower velocity dispersions within one effective radius are consistent Chabrier-like IMF, while higher more bottom-heavy IMF...
By comparing the dynamical and lensing masses of early-type lens galaxies, one can constrain both cosmological parameters density profiles galaxies. We explore constraining power on effect mass model in this method with 161 galaxy-scale strong systems, which is currently largest sample high resolution imaging stellar data. assume a power-law for lenses, consider three different parameterizations $\gamma$ (i.e., slope total profile) to include dependence redshift surface density. When...