A5103111979- Stellar, planetary, and galactic studies
- Pulsars and Gravitational Waves Research
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
- Astro and Planetary Science
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Gamma-ray bursts and supernovae
- Galaxies: Formation, Evolution, Phenomena
- Astrophysical Phenomena and Observations
- Adaptive optics and wavefront sensing
- Astrophysics and Cosmic Phenomena
- Astronomical Observations and Instrumentation
- History and Developments in Astronomy
Xinjiang Astronomical Observatory
2025
University of Chinese Academy of Sciences
2025
East China University of Technology
2023
Chinese Academy of Sciences
1999-2015
National Astronomical Observatories
2011-2015
Rochester Institute of Technology
2011
Shanghai Astronomical Observatory
1999
The nearly continuous light curves with micromagnitude precision provided by the space mission Kepler are revolutionising our view of pulsating stars. They have revealed a vast sea low-amplitude pulsation modes that were undetectable from Earth. long time base allows an accurate determination frequencies and amplitudes needed for in-depth asteroseismic modeling. However, study to be successful, first estimates stellar parameters need known they can not derived photometry itself. Input...
The anomalous orbits of trans-Neptunian objects can be accounted for by the planet 9 hypothesis. One intriguing possibility is that could a dilute axion star captured Solar System, with ratio to dark matter being approximately <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>1</a:mn><a:mo>/</a:mo><a:mn>10</a:mn></a:mrow></a:math>. Although stars emit monochromatic signals through two-photon decay, spontaneous decay signal too weak detected radio telescopes....
Linear polarization of diffuse Galactic emission is a signature magnetic fields in the interstellar medium our Galaxy. Observations at high frequencies are less affected by Faraday depolarization than those lower and able to detect polarized from more distant regions. We attempt perform sensitive survey disk 6 cm wavelength. made observations plane using Urumqi 25-m telescope covering area 60deg< l <129deg |b|<5deg. Missing large-scale structures were restored extrapolation WMAP data....
We explore the possibility that GSC 07396–00759 (spectral type M1e) is a widely separated (∼282, or projected separation ∼12,350 AU) companion to "old" (age ∼12 Myr) classical T Tauri binary system V4046 Sgr AB, as suggested by proximity and similar space motions of two systems. If systems are equidistant coeval, then 07396–00759, like must be spectroscopic with nearly equal-mass components, at least ∼8 Myr old. Analysis serendipitous Chandra X-ray grating spectrum light curve well...
Spectroscopic observations were made for a sample of 263 stars from three young open clusters IC 1805, NGC 654 and 6823 with CCD detectors in the blue yellow-red spectral regions. MKK types properly determined these by carefully comparing spectra program those complete grid standards, which observed same instruments as stars. For most precise assigned first time. A few early-type emission-line discovered or confirmed. The presence Be studied is discussed. Spectra standards also reveal lots...
The anomalous orbits of trans-Neptunian objects (TNOs) can be explained by the planet 9 hypothesis. We propose that an axion star. Axion stars are gravitational bound clusters condensed QCD axions or axionlike particles (ALPs), which we call for brevity. find probability capturing star solar system is same order magnitude as a free floating (FFP), and even higher case star, with mass...
The anomalous orbits of trans-Neptunian objects can be accounted for by the planet 9 hypothesis. One intriguing possibility is that could a dilute axion star captured solar system, with ratio to dark matter being approximately 1/10. Although stars emit monochromatic signals through two-photon decay, spontaneous decay signal too weak detected radio telescopes. However, we find stimulated star, which explains 9, occur directing beam power 50MW into star. resulting echo terrestrial telescopes...
Fast radio bursts (FRBs) can be explained by collapsing axion stars, imposing constraints on the parameter space and providing valuable guidance for experimental searches. In traditional post-inflationary model, stars could constitute up to $75\%$ of dark matter component, suggesting that some may exist within solar system. Electromagnetic radiation with an angular frequency equal half mass stimulate decay. Thus, directing a powerful beam at star trigger its stimulated decay, producing...
The standard model of cosmology shows that there is about 26.8% dark matter in the universe. Although many models have been proposed, nature still not clear at present. There are two major candidates for matter, particles and primordial black holes. However, it difficult to distinguish these kinds by using gravitational lensing effect matter. Based on influence asteroid motion, we find if composed particles, its motion very weak. If holes, may produce observational effect. Therefore, holes...
The anomalous orbits of Trans-Neptunian Objects (TNOs) can be explained by the Planet 9 hypothesis. We propose that an axion star. Axion stars are gravitational bound clusters condensed QCD axions or axion-like particles (ALPs), which we call for brevity. find probability capturing star solar system is same order magnitude as a free floating planet (FFP), and even higher case star, with mass $5M_\oplus\approx1.5\times10^{-5}M_\odot$ $Ω_{\rm{AS}}/Ω_{\rm{DM}}\simeq 1/10$. Although emit...