A5100379252- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Astro and Planetary Science
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Cosmic Phenomena
- History and Developments in Astronomy
- Lightning and Electromagnetic Phenomena
- Planetary Science and Exploration
- Inertial Sensor and Navigation
- Space Satellite Systems and Control
- Pulsars and Gravitational Waves Research
- Robotics and Sensor-Based Localization
- Geophysics and Gravity Measurements
- Particle Detector Development and Performance
- Radio Astronomy Observations and Technology
- Advanced Image and Video Retrieval Techniques
- High-Voltage Power Transmission Systems
- Infrared Target Detection Methodologies
- Advanced Optical Sensing Technologies
- Cold Atom Physics and Bose-Einstein Condensates
- Optical Systems and Laser Technology
Shanghai Astronomical Observatory
2016-2025
Beijing Normal University
2004-2025
University of Chinese Academy of Sciences
2015-2025
Chinese Academy of Sciences
2012-2025
Tiangong University
2019-2025
Institute of Geochemistry
2023-2025
Anhui University
2025
Nanjing University of Posts and Telecommunications
2025
Yunnan University
2025
Qilu Hospital of Shandong University
2025
The Large sky Area Multi-Object Spectroscopic Telescope (LAMOST) General Survey is a spectroscopic survey that will eventually cover approximately half of the celestial sphere and collect 10 million spectra stars, galaxies QSOs. Objects both in pilot first year general are included LAMOST First Data Release (DR1). started October 2011 ended June 2012, data have been released to public as Pilot August 2012. September completed its operation 2013. DR1 includes total 1202 plates containing...
We describe the current plans for a spectroscopic survey of millions stars in Milky Way galaxy using Guo Shou Jing Telescope (GSJT, formerly Large Area Multi-Object Spectroscopic - LAMOST). The will obtain spectra 2.5 million brighter than $r<19$ during dark/grey time, and 5 $r<17$ or $J<16$ on nights that are moonlit have low transparency. begin fall 2012, run at least four years. telescope design constrains optimal declination range observations to $10^\circ<\delta<50^\circ$, site...
Many phylogenomic studies based on transcriptomes have been limited to "single-copy" genes due methodological challenges in homology and orthology inferences. Only a relatively small number of explored analyses beyond reconstructing species relationships. We sampled 69 the hyperdiverse plant clade Caryophyllales 27 outgroups from annotated genomes across eudicots. Using combined similarity- phylogenetic tree-based approach, we recovered 10,960 homolog groups, where each was represented by at...
Abstract Tipping elements on Earth are components that undergo rapid and irreversible changes when climate change reaches a tipping point. They highly sensitive to variations serve as early warning signs of global change. Human activities, including pledges, significantly influence the state elements. Land external intuitive response change, making it essential identify shifts in land system. We produced 1-km system dataset for terrestrial years 2000, 2010, 2020, 2100 under pledges by...
Abstract GRB 230812B, detected by the Gamma-Ray Integrated Detectors constellation mission, is an exceptionally bright gamma-ray burst (GRB) with a duration of only 3 s. Sitting near traditional boundary (∼2 s) between long and short GRBs, 230812B notably associated supernova, indicating massive star progenitor. This makes it rare example short-duration resulting from stellar collapse. Our analysis, using time-evolving synchrotron model, suggests that has emission radius approximately 10...
We have compiled two new open cluster catalogs. In the first one, there are 119 objects with ages, distances, and metallicities available, while in second 144 both absolute proper motion radial velocity data, of which 45 clusters also metallicity data available. Taking advantage large number included our sample, we present an iron gradient about -0.063 ± 0.008 dex kpc-1 from is quite consistent most recent determination oxygen nebulae young stars, -0.07 kpc-1. By dividing into age groups,...
eXTP is a science mission designed to study the state of matter under extreme conditions density, gravity and magnetism. Primary goals are determination equation at supra-nuclear measurement QED effects in highly magnetized star, accretion strong-field regime gravity. targets include isolated binary neutron stars, strong magnetic field systems like magnetars, stellar-mass supermassive black holes. The carries unique unprecedented suite state-of-the-art scientific instruments enabling for...
Abstract We systematically searched for open clusters in the solar neighborhood within 500 pc using pyUPMASK and HDBSCAN clustering algorithms based on Gaia DR3. Taking into consideration that physical size most is less than 50 pc, we adopted a slicing approach different distance shells identified 324 neighboring clusters, including 223 reported 101 newly discovered named here as Open Cluster of Solar Neighborhood. Our discovery has increased number by about 45%. In this work, larger spatial...
A project of a spectroscopic survey Galactic structure and evolution with Large sky Area Multi-Object fiber Spectroscopic Telescope (LAMOST) is presented. The consists two observational modes for various targets in our Galaxy. One major the Milky Way aimed at systematic study stellar abundance chemical through low resolution (R = 1000−2000) spectroscopy. Another follow-up observation medium 10000) spectrographs detailed studies selected stars different composition, kinematics dynamics.
A novel polymer inclusion membrane (PIM) was prepared for the preconcentration and separation of heavy rare earth element (HREE) Lutetium (Lu) from dilute solution. The composed poly(vinylidene fluoride) (PVDF) as a matrix bifunctional ionic liquid extractant [tricaprylmethylammonium][di(2-ethylhexyl)orthophosphinate] ([A336][P507]) carrier, without any plasticizer. weak physical effect existed between PVDF chain segment [A336][P507], but no chemical interaction. Structure characterization...
Since September 2018, LAMOST starts a new 5-year medium-resolution spectroscopic survey (MRS) using bright/gray nights. We present the scientific goals of LAMOST-MRS and propose near optimistic strategy survey. A complete footprint is also provided. Not only regular survey, but time-domain being conducted since 2018 will be end in 2023. According to detailed plan, we expect that can observe about 2 million stellar spectra with ~7500 limiting magnitude around G=15 mag. Moreover, it provide...
We derive the proper motions, membership probabilities, and velocity dispersions of stars in regions young (∼2-4 Myr old) open clusters NGC 2244 (the central cluster Monoceros R2 association) 6530 dominant Sgr OB1 from photographic plate material obtained at Shanghai Astronomical Observatory, with time baselines 34 87 yr, respectively. Both show clear evidence mass segregation, but they do not exhibit any significant velocity-mass (or, equivalently, velocity-luminosity) dependence. This...
In Gaia DR2, the unprecedented high-precision level reached in sub-mas for astrometry and mmag photometry. Using cluster members identified with these photometry we can obtain a reliable determination of properties. However, because shortcoming spectroscopic observation dealing densely crowded region, number radial velocity metallicity member stars from DR2 is still lacking. this study, aim to improve properties by combining LAMOST spectra. particular, provide list parameters as an add-value...
Abstract We report 541 new open-cluster candidates in Gaia EDR3 through revisiting the cluster results from an earlier analysis of DR2, which revealed nearly 1000 solar neighborhood (mostly d <3 kpc) residing at Galactic latitudes ∣ b < 20°. A subsequent comparison with lists known clusters shows a large increase samples within 2 kpc Sun. assign membership probabilities to stars open-source pyUPMASK algorithm, and also estimate physical parameters isochrone fitting for each candidate....
The Force Concept Inventory (FCI) is a 30-question multiple-choice assessment that has been building block for much of the physics education research done today. In practice, there are often concerns regarding length test and possible test-retest effects. Since many studies in literature use mean score FCI as primary variable, it would be useful then to have different shorter tests can produce FCI-equivalent scores while providing benefits being quicker administer overcoming this study, we...
Abstract A sub-array of the Large High Altitude Air Shower Observatory (LHAASO), KM2A is mainly designed to observe a large fraction northern sky hunt for γ-ray sources at energies above 10 TeV. Even though detector construction still underway, half array has been operating stably since end 2019. In this paper, we present data analysis pipeline and first observation Crab Nebula, standard candle in very high energy astronomy. We detect signals from Nebula both ranges 100 TeV with...
Abstract With the help of Gaia data, it is noted that in addition to core components, there are low-density outer halo components extended region open clusters. In order study structure beyond radius cluster (∼10 pc), based on Early Data Release 3, taking up 50 pc as searching radius, we use pyUPMASK algorithm redetermine member stars within 1–2 kpc. We obtain 256 clusters, especially those located Furthermore, find radial density profile for most clusters deviates from Kings profile. better...