A5079510187- Cosmology and Gravitation Theories
- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Global Education and Multiculturalism
- Adaptive optics and wavefront sensing
- Gamma-ray bursts and supernovae
- Teacher Professional Development and Motivation
- Education and Work Dynamics
- Higher Education and Teaching Methods
- Advanced Adaptive Filtering Techniques
- Blind Source Separation Techniques
- Innovative Teaching Methods
- Scientific Research and Discoveries
- Science Education and Pedagogy
- Emotional Intelligence and Performance
- Engineering Education and Curriculum Development
- Critical and Liberation Pedagogy
- Education and Vocational Training
- Educational Research and Pedagogy
- Educational Philosophies and Pedagogies
- Innovative Educational Technologies
- Ideological and Political Education
- Astrophysical Phenomena and Observations
- Particle physics theoretical and experimental studies
- Education and Critical Thinking Development
Chinese Academy of Sciences
2022-2024
University of Chinese Academy of Sciences
2019-2024
National Astronomical Observatories
2022-2024
Soochow University
2002-2013
Abstract The reconstruction method was proposed more than a decade ago to boost the signal of baryonic acoustic oscillations measured in galaxy redshift surveys, which is one key probes for dark energy. After moving observed overdensities surveys back their initial position, reconstructed density field closer linear Gaussian field, with higher-order information moved into power spectrum. We find that by jointly analysing spectra from pre- and post-reconstructed samples, beyond 2-point...
Abstract We develop methods to extract key dark energy information from cosmic distance measurements including the BAO scales and supernova (SN) luminosity distances. Demonstrated using simulated data sets of complete DESI, LSST Roman surveys designed for SN measurements, we show that our method, dynamical behavior energy, pressure, equation state (with its time derivative) deceleration function can all be accurately recovered high-quality data, which allows robust diagnostic tests models.
In this work, we develop a theoretical model for the cross-power spectrum of galaxy density field before and after standard baryonic acoustic oscillation (BAO) reconstruction. Using model, extract redshift-space distortion (RSD) parameter from spectrum. The is validated against suite high-resolution $N$-body simulations, demonstrating its accuracy robustness cosmological analyses.
Abstract In this work, we investigate a joint fitting approach based on theoretical models of power spectra associated with density-field reconstruction. Specifically, consider the matter auto-power before and after baryon acoustic oscillation (BAO) reconstruction, as well cross-power spectrum between pre- post-reconstructed density fields. We present redshift-space for these three at one-loop level within framework standard perturbation theory (SPT), perform analysis using types spectra,...
We extract key information of dark energy from current observations BAO, OHD and $H_0$, find hints dynamical behaviour energy. In particular, a model whose equation state crosses $-1$ is favoured by observations. also that the Universe has started accelerating at lower redshift than expected.
ABSTRACT We perform a multitracer full-shape analysis in Fourier space based on the effective field theory of large-scale structure (EFTofLSS) using complete Sloan Digital Sky Survey IV (SDSS-IV) extended Baryon Oscillation Spectroscopic (eBOSS) DR16 luminous red galaxy (LRG) and emission line (ELG) samples. study detail impact volume projection effect different prior choices when doing EFTofLSS model. show that adopting combination Jeffreys Gaussian can mitigate avoid exploring unphysical...
We perform a multi-tracer full-shape analysis in Fourier space based on the effective field theory of large-scale structure (EFTofLSS) using complete Sloan Digital Sky Survey IV (SDSS-IV) extended Baryon Oscillation Spectroscopic (eBOSS) DR16 luminous red galaxy (LRG) and emission line (ELG) samples. study detail impact volume projection effect different prior choices when doing EFTofLSS model. show that adopting combination Jeffreys Gaussian can mitigate avoid exploring unphysical regions...
Abstract The "reconstruction" method was proposed more than a decade ago to boost the signal of baryonic acoustic oscillations measured in galaxy redshift surveys, which is one key probes for dark energy. After moving observed galaxies surveys back their initial position, reconstructed density field closer linear Gaussian field, with higher-order information moved into power spectrum. By combining spectra from pre- and post-reconstructed samples, beyond 2-point spectrum can be efficiently...
The ``reconstruction" method was proposed more than a decade ago to boost the signal of baryonic acoustic oscillations measured in galaxy redshift surveys, which is one key probes for dark energy. After moving observed overdensities surveys back their initial position, reconstructed density field closer linear Gaussian field, with higher-order information moved into power spectrum. We find that by jointly analysing spectra from pre- and post-reconstructed samples, beyond 2-point spectrum can...
We develop methods to extract key dark energy information from cosmic distance measurements including the BAO scales and supernovae luminosity distances. Demonstrated using simulated datasets of complete DESI, LSST Roman surveys designed for SNe measurements, we show that our method, dynamical behaviour energy, pressure, equation state (with its time derivative) deceleration function can all be accurately recovered high-quality data, which allows robust diagnostic tests models.
Abstract We extract key information on dark energy from current observations of BAO, OHD and H 0 , find hints dynamical behavior energy. In particular, a model whose equation state crosses −1 is favored by observations. also that the Universe has started accelerating at lower redshift than expected.
Abstract We propose a new consistency test for the ΛCDM cosmology using baryonic acoustic oscillations (BAO) and redshift space distortion (RSD) measurements from galaxy surveys. Specifically, we determine peak position of f σ 8 ( z ) in offered by an RSD measurement, compare it to one predicted BAO observables assuming flat cosmology. demonstrate this simulated data DESI survey, argue that complements those background alone, is less subject systematics analysis, compared traditional methods...
<xhtml:span xmlns:xhtml="http://www.w3.org/1999/xhtml" xml:lang="en">How China's National Teacher Training Project is boosting the skills and effectiveness of country's science educators.</xhtml:span>
Chinese secondary school students completed a questionnaire on how they learn physics. This analysis of the results shows where difficulties in physics teaching are and can be reformed.
First Page
The aims and principles underlying recent reforms in the junior school physics course China are explained here. focus is on developing students' abilities benefits of experiments rather than simple transfer knowledge from teacher to students.