A5100391012- Stellar, planetary, and galactic studies
- Galaxies: Formation, Evolution, Phenomena
- Astro and Planetary Science
- Astrophysical Phenomena and Observations
- Solar and Space Plasma Dynamics
- Planetary Science and Exploration
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
- Superconducting and THz Device Technology
- Lightning and Electromagnetic Phenomena
- Ionosphere and magnetosphere dynamics
- Astrophysics and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Gamma-ray bursts and supernovae
- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Advanced Chemical Physics Studies
- Icing and De-icing Technologies
- Bone health and osteoporosis research
- Crystallography and molecular interactions
- Solar Radiation and Photovoltaics
- Advanced Thermodynamic Systems and Engines
- Advanced X-ray Imaging Techniques
- High voltage insulation and dielectric phenomena
- Noncommutative and Quantum Gravity Theories
Tsinghua University
2022-2024
Xiangtan University
2023
University of Utah
2020-2023
University of Maryland, College Park
2002-2023
Xi’an University of Posts and Telecommunications
2023
University of Missouri
2023
Space Engineering University
2022
China National Space Administration
2020-2021
National Engineering Research Center for Information Technology in Agriculture
2019
Xi'an University of Technology
2018
Abstract Diffuse radio sources known as relics are direct tracers of shocks in the outskirts merging galaxy clusters. PSZ2 G200.95–28.16, a low-mass cluster ( M 500 = (2.7 ± 0.2) × 10 14 ⊙ ), features prominent relic, first identified by R. Kale et al. We name this relic Seahorse. The MeerKAT Galaxy Cluster Legacy Survey has confirmed two additional relics, R2 and R3, cluster. present new observations with upgraded Giant Metrewave Radio Telescope (uGMRT) at 400 650 MHz, paired Chandra X-ray...
Abstract The Ophiuchus galaxy cluster exhibits a curious concave gas density discontinuity at the edge of its cool core. It was discovered in Chandra X-ray image by Werner and collaborators, who considered possibility it being boundary an active galactic nucleus (AGN)-inflated bubble located outside core, but discounted this because required much too powerful AGN outburst. Using low-frequency (72–240 MHz) radio data from Murchison Widefield Array/GLEAM Giant Metrewave Radio Telescope, we...
As the only natural satellite of Earth, Moon is first target for human space exploration, due to its unique location, highly characteristic environmental resources and abundant material resources. The Earth-Moon system proving ground exploration solar system, a transit point towards farther deep space. Lunar science plays an important role in promoting development science. utilization lunar great significance sustainable mankind. In recent years, China’s has achieved remarkable achievements....
ABSTRACT We present results from a deep Chandra X-ray observation of merging galaxy cluster A520. A high-resolution gas temperature map reveals long trail dense, cool clumps—apparently the fragments core that has been stripped infalling subcluster by ram pressure. The clumps should still be connected stretched magnetic field lines. observed variations imply thermal conductivity is suppressed factor <?CDATA $\gt 100$?> across presumed direction (as found in other clusters), and also along...
This paper reviews the worldwide development course and current status of heliospheric boundary exploration. On basis trends revealed recently, we illustrate four categories scientific objectives solar system exploration propose some formulations for overall objectives, phased goals, short-term missions Chinas explorations in future. Additionally, summarize six types key techniques that may help make breakthroughs field. study provides preliminary results further demonstration implementation...
We studied the prominent bow shock in merging galaxy cluster A520 using a deep Chandra X-ray observation and archival VLA radio data. This is useful diagnostic tool, owing to its clear geometry relatively high Mach number. At "nose" of shock, we measure number $M=2.4_{-0.2}^{+0.4}$. The becomes oblique away from merger axis, with falling $\simeq$1.6 around 30$^{\circ}$ nose. electron temperature immediately behind nose consistent that Rankine-Hugoniot adiabat, higher (at 95% confidence) than...
Hot Universe Baryon Surveyor (HUBS) is a proposed space-borne observatory for X-ray astronomy. The primary scientific objectives of the mission are to fill void in probing ecosystem galaxies and thus advance our understanding galaxy formation evolution, which fundamental importance cosmology. More specifically, HUBS aims at directly detecting soft emission from diffuse gas temperature exceeding 106 K, theoretically postulated permeate large structures cosmic web also extended halo galaxies....
The most striking characteristics of the mysterious 2175 Angstrom extinction bump, strongest spectroscopic absorption feature seen on interstellar curve, are invariant central wavelength and variable bandwidth: its peak position at is remarkably constant while bandwidth varies from one line sight to another. However, recent studies lines toward a number Herbig Ae/Be stars have revealed that bump exhibits substantial shifts canonical Angstrom. In this work we revisit these take physical...
We analysed the deep archival Chandra observations of high-temperature galaxy cluster Abell 2319 to investigate prominent cold front in its core. The main sharp arc shows wiggles, or variations radius density jump along arc. At southern end is a feature that resembles Kelvin-Helmholtz (KH) eddy, beyond which dissolves. These features suggest KH instabilities develop at front. Under this assumption, we can place an upper limit on ICM viscosity several times below isotropic Spitzer value....
We analyzed 200 ks of Chandra ACIS observations the merging galaxy cluster A2142 to examine its prominent cold fronts in detail. find that southern front exhibits well-developed Kelvin-Helmholtz (KH) eddies seen sky plane. Comparing their wavelength and amplitude with those hydrodynamic simulations viscous gas, estimating gas tangential velocity from centripetal acceleration, we constrain effective viscosity be at most 1/5 Spitzer isotropic viscosity, but consistent full Braginskii...
The Bowen code, developed in the 1980s and 1990s, was optimized for studying mass loss mechanism as a system. It allowed inclusion of pulsation with shock development, non‐LTE coupling gas to radiation field departures from radiative equilibrium, grain formation acceleration by radiation, on molecules. Most these were found play important roles development massive wind. All treated simple parameterized relations that could be adjusted test effects using information more detailed...
Abstract Galaxy clusters are the most recently formed and massive, gravitationally bound structures in Universe. The number of galaxy is highly dependent on cosmological parameters, such as dark matter density, σ 8 , Ω m . density a function cluster mass, which can be estimated from temperature profiles intracluster medium under assumption hydrostatic equilibrium. plasma, hence its calculated X-ray spectra. However, effective-area calibration uncertainties soft band result significantly...
The measurement performance of the atom interferometry absolute gravimeter is strongly affected by ground vibration noise. We propose a noise evaluation scheme using Michelson laser interferometer constructed intrinsic Raman atomic gravimeter. Theoretical analysis shows that phase accuracy better than 4 mrad, which corresponds to about 10 −10 g for single shot gravity measurement. Compared with commercial seismometer or accelerometer, this method simple, low cost, direct, and fully...
DIffuse X-ray Explorer (DIXE) is a proposed high-resolution spectroscopic sky surveyor on the China Space Station (CSS). DIXE will focus studying hot baryons in Milky Way. Galactic like emitting Way halo and eROSITA bubbles are best observed survey mode with large field of view. take advantage orbital motion CSS to scan fraction sky. High-resolution spectroscopy, enabled by superconducting microcalorimeters based transition-edge sensor (TES) technology, probe physical properties (e.g.,...
We use a multilevel path integral Monte-Carlo (PIMC) method to simulate the arrangement of He atoms around single Al atom doped in cluster. High-level ab initio Al-He pair potentials and Balling Wright pairwise Hamiltonian model are used describe full potential electronic asymmetry arising from open-shell character its ground excited states. Our calculations show that doping 3p electron strongly influences packing. The results PIMC simulation predict excitation spectrum an embedded clusters....
Lightning is one of the main reasons for failure wind turbine, arc generated by lightning strikes arrester on blade, and current passes through inside blade then to hub, nacelle tower, finally into earth. Overvoltage overcurrent are produced in this process, causing equipment damage even threatening other units farm. This article built turbine model ATPdraw simulation software. First all, according characteristics a certain area, transient caused simulated analyzed. Then, influence points...
Abstract The analysis of samples returned from a planetary body is important to understand the origin, composition, evolution, and interactions with space or atmospheric weathering planet. In particular, pristine rocks, which are not affected by weathering, can be collected during sampling work. will significantly promote calibration, verification, interpretation remote sensing data improve knowledge interior materials using geophysical measurements. Chang’e-5 lander, first Chinese science...