Most papers are machine-translated to English; some are originally in English.
Showing 50 of 144 papers in Astronomy
The "Insight" Hard X-ray Modulation Telescope (abbreviated as Insight satellite, with the English name Insight Hard X-ray Modulation Telescope, abbreviated as Insight-HXMT or HXMT), launched on June 15, 2017, marks the birth of China's first domestically developed observatory-class X-ray telescope. …
Previous studies aiming to accelerate data processing have focused on enhancement algorithms, using the graphics processing unit (GPU) to speed up programs, and thread-level parallelism. These methods overlook maximizing the utilization of existing central processing unit (CPU) resources and reducin…
Radio environment plays an important role in radio astronomy observations. Further analysis is needed on the time and intensity distributions of interference signals for long-term radio environment monitoring. Sample variance is an important estimate of the interference signal decision threshold. He…
The Ground-based Wide-Angle Cameras array necessitates the integration of more than 100 hardware devices, 100 servers, and 2 500 software modules that must be synchronized within a 3-second imaging cycle. However, the complexity of real-time, high-concurrency processing of large datasets has histori…
The performance of the deconvolution algorithm plays a crucial role in data processing of radio interferometers. The multi-scale multi-frequency synthesis (MSMFS) CLEAN is a widely used deconvolution algorithm for radio interferometric imaging, which combines the advantages of both wide-band synthes…
The efficient operation of automated astronomical data processing pipelines relies on precise calibration reference data recommendation mechanisms. Consequently, comprehensive calibration reference data systems have emerged. This paper systematically reviews the calibration reference data recommenda…
During operation, ground-based laser interferometric gravitational wave detectors experience uncontrollable displacements in their internal optical systems due to various noise disturbances. To improve detector sensitivity and enable detection of weak gravitational wave signals, length sensing and c…
In recent years, China has achieved breakthrough progress in the development of infrared detectors. To meet the requirements of astronomical observation, comprehensive testing of all performance metrics relevant to astronomical detection has been conducted on this infrared detector, obtaining import…
The drive motors of radio telescope servo systems exhibit speed mismatch during operation, which, as telescope aperture increases and precision improves, severely impacts the high-precision pointing and tracking control of large-aperture radio telescopes. To reduce speed deviation during servo syste…
As one of the important methods for probing the cosmic reionization epoch, the core objective of low-frequency all-sky total-power experiments is to search for the extremely weak neutral hydrogen 21 cm signal from the cosmic reionization epoch in the all-sky total-power spectrum within the frequency…
High-amplitude delta Scuti variable stars (HADS) are a subclass of delta Scuti pulsating variables, characterized by short pulsation periods, large amplitudes, and single or multiple radial pulsation modes, making them important targets for asteroseismic studies. Using time-series photometric data p…
To date, a total of 72 black hole X-ray transients and their candidates have been detected, of which 19 have received dynamical confirmation. These transients are X-ray binary systems composed of stellar-mass black holes and low-mass stars. Measurements of the fundamental parameters of stellar-mass …
Outflows represent a crucial form of quasar feedback, playing a significant role in understanding the co-evolution of quasars and their host galaxies. We have collected relevant literature on velocity drifts in quasar outflow absorption lines, compiled case data, and conducted comparative analyses o…
Galaxy clusters, as the largest self-gravitating bound systems in the universe, serve not only as laboratories for studying galaxy formation and evolution, but also as precise tracers of the large-scale structure of the universe. This work primarily introduces the observational characteristics, phys…
Mantle convection is a crucial internal process in the evolution of terrestrial planets. This study summarizes the latest research advances on mantle convection in solar system terrestrial planets and large satellites, employing a comparative planetology methodology to address three fundamental ques…
We present a detailed review of the perihelion observational data and near-Earth observation events of active asteroid (3200) Phaethon, analyzing the activity mechanisms near perihelion, particularly those driven by thermal fracturing, water ice, and sodium sublimation. Based on investigations of Ph…
Using high-sensitivity, high-resolution mapping observations of the 12CO (J = 1–0, J is the angular momentum quantum number) molecular line obtained with the 13.7 m millimeter-wave telescope at the Purple Mountain Observatory Qinghai Station, extremely high-velocity gas with a total velocity width o…
Iron low-ionization broad absorption line quasars (Fe Low-ionization Board Absorption Line Quasar, FeLoBALQ) represent one of the rarest subclasses of quasars. The radiation from these objects violently expels surrounding material, forming powerful high-velocity outflows in which low-ionization spec…
To address the problem of low computational efficiency in calculating thermally induced deformation of large reflector antennas, a method for rapidly predicting antenna thermal deformation is proposed. The method first establishes a thermal analysis model for a single antenna panel, then analyzes th…
For the catalog management of large batches of space debris, the correlation matching between wide-area surveillance orbit measurement data and cataloged targets is a prerequisite and key factor. The correlation accuracy rate not only affects normal catalog processing but also influences observation…
Galaxy structural parameters are fundamental to understanding galaxy formation and evolution. Existing galaxy fitting software, such as GALFIT and 2DPHOT, suffer from limitations including slow runtime performance, heavy reliance on manual intervention, and sensitivity to initial values. To circumve…
In response to the current situation of inconsistent conclusions among existing asteroid collision monitoring systems, this study investigates the linear approximation method employed by line of variation collision monitoring systems, concluding that the deviation between the orbital distribution ob…
Within the atmospheric isoplanatic angle, simultaneous measurement of interference fringes from both the scientific target and the tracking target enables microarcsecond-level astrometric precision through precise determination of the optical path difference between the two fringe patterns. For high…
This study defines entropy related to mass ordering in multi-planetary systems and investigates the impact of planetary system dynamical evolution on planetary mass-ordering entropy using Monte Carlo simulations and $N$-body dynamical numerical simulations. The results demonstrate that behaviors suc…
In the hierarchical clustering model of galaxy formation and evolution, interactions and merger processes between galaxies serve as important mechanisms for galaxy mass growth, producing low surface brightness tidal structures around galaxies. Observationally, long exposure times combined with speci…
Employing the standard MIT bag model, we investigate the influence of non-Newtonian gravitational effects on the structure of color-flavor locked phase strange stars. The results demonstrate that the maximum mass of color-flavor locked phase strange stars increases not only with increasing color-sup…
Using molecular line mapping with the Institut de Radioastronomie Millimétrique (IRAM) 30 m radio telescope in the 1.3–4.0 mm band, combined with 70–870 μm continuum data and mapping of the $ {\rm{NH}}3$$(J, K)=(1, 1)$ and $(2, 2)$ lines with the Green Bank Telescope (GBT) (where $J$ is the total an…
Dark matter detection has long been a major scientific objective in modern astronomy and physics. Among these, the axion in Quantum Chromodynamics (QCD) is considered a natural candidate for dark matter. Currently, electromagnetic response detection of axions with micro-electronvolt-scale mass has r…
Searching for primordial gravitational waves in the cosmic microwave background (CMB) polarization signal is one of the key topics in modern cosmology. Cutting-edge CMB telescopes require thousands of pixels to maximize mapping speed. Using a modular design, the telescope focal plane is simplified t…
The availability of large data sets containing stellar parameters, distances, and extinctions for stars in the Milky Way, particularly within the Galactic disk, is essential for advancing our understanding of the Galaxy's stellar populations, structure, kinematics, and chemical evolution. In this st…
The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) has become a crucial resource in astronomical research, offering a vast amount of spectral data for stars, galaxies, and quasars. This paper presents the data processing methods used by LAMOST, focusing on the classification and …
Before solar eruptions, a short-term slow-rise phase is often observed, during which the pre-eruption structure ascends at speeds much greater than the photospheric motions but much less than those of the eruption phase. Numerical magnetohydrodynamic (MHD) simulations of the coronal evolution driven…
The China Space Station Telescope (CSST) is primarily designed for large-scale multi-color imaging and seamless spectroscopic survey, while also accommodating observations with an integral field spectrograph (IFS), multi-channel imaging, direct imaging of exoplanets, and terahertz-band observations.…
Photometric redshifts of galaxies obtained from multi-wavelength data are widely used in photometric surveys due to their high efficiency. Although various methods have been developed, template fitting remains one of the most popular approaches. Its accuracy strongly depends on the quality of spectr…
We present the application of a machine learning based galaxy group finder to real observational data from the Sloan Digital Sky Survey Data Release 13 (SDSS DR13). Originally designed and validated using simulated galaxy surveys in redshift space, our method utilizes deep neural networks to recogni…
δ Scuti (δ Sct) stars are potential distance tracers for studying the Milky Way structure. We conduct a comprehensive analysis of the period–luminosity (PL) and period–luminosity–metallicity (PLZ) relations for δ Sct stars, integrating data from the Zwicky Transient Facility, the Transiting Exoplane…
In this manuscript, we report evidence to support the dependence of Dn4000 (4000 Å break strength to trace stellar ages) on central active galactic nuclei (AGN) activity traced by narrow emission line properties in local Type-2 AGN in SDSS DR16. Based on the measured Dn4000 and flux ratios of [O iii…
The study of multiple molecular spectral lines in gas infalling sources can provide the physical and chemical properties of these sources and help us estimate their evolutionary stages. We report line detections within the 3 mm band using the FTS wide-sideband mode of the IRAM 30 m telescope toward …
The central compact object XMMU J173203.3−344518 in the supernova remnant HESS J1731−347 challenges conventional neutron star models due to its low mass and high redshifted surface temperature eV (). We investigate the observational properties of XMMU J173203.3−344518 within a color-flavor-locked(CF…
LB-1 is a binary system that has drawn great attention since its discovery in 2019. The two components of LB-1 are suggested to be a B-type star plus a black hole (BH). In this paper, we first calculate the wind mass-loss rate of the B-type star. We then calculate the mass capture rate by the BH, wi…
We demonstrate by three-dimensional hydrodynamical simulations of energy deposition into the envelope of a red supergiant model the inflation of a Rayleigh–Taylor unstable envelope that forms a compact clumpy circumstellar material (CSM). Our simulations mimic vigorous core activity years to months …
The Spectral Imaging CoronaGraph (SICG) serves as the optical observation equipment of E-corona in the Chinese Meridian Project Phase II, which aims at monitoring the initial source of solar activities. For the purpose of in-depth exploration and space weather forecast in the full chain of Sun–Earth…
The study of carbon-enhanced metal-poor (CEMP) stars is of great significance for understanding the chemical evolution of the early universe and stellar formation. CEMP stars are characterized by carbon overabundance and are classified into several subclasses based on the abundance patterns of neutr…
Numerous experiments have been designed to investigate the Cosmic Dawn (CD) and Epoch of Reionization (EoR) by examining redshifted 21 cm emissions from neutral hydrogen. Detecting the global spectrum of redshifted 21 cm signals is typically achieved through single-antenna experiments. However, this…
Accurate measurements of stellar positions and velocities are crucial for studying galactic and stellar dynamics. We aim to create a Cartesian catalog from Gaia DR3 to serve as a high-precision database for further research using stellar coordinates and velocities. To avoid the negative parallax val…
Recent JWST observations have revealed that dwarf galaxies start to cease star formation at redshifts z > 1, yet the quenching process remains unclear. In this study, we selected a large sample of 3405 dwarf galaxies with stellar masses below 10^9.5 M⊙ and redshifts ranging from 1.0 to 1.5 across al…
We explore the feasibility of H i galaxy redshift surveys with the Five-hundred-meter Aperture Spherical Telescope (FAST) and its proposed Core Array interferometry. Using semi-analytical simulations, we compare the performance of the FAST single-dish and Core Array modes in drift scan (DS) and on-t…
Pulsar candidate identification is an indispensable task in pulsar science. Based on the characteristics of imbalanced and diverse pulsar data sets, and the lack of a unified processing framework, we first used dimensionality reduction and visualization to analyze potential deficiencies caused by th…
In this paper, new light curve fitting and orbital period change analysis of two contact binaries NSVS 9023048 and NSVS 2461789 are presented. We found that both of them are totally eclipsing contact binaries. Our photometric solutions suggest that NSVS 9023048 is a deep contact binary (q = 10.14, f…
This study addresses the critical technical need to enhance the 1–10 day prediction accuracy of polar motion (PM) in satellite autonomous navigation and deep space exploration, with a focus on optimizing the convolution input accuracy within the least squares and autoregression with effective angula…
