Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Chinese Academy of SciencesCN5.9k papers
- University of Chinese Academy of SciencesCN2.2k papers
- Peking UniversityCN1.2k papers
- Centre National de la Recherche ScientifiqueFR759 papers
- Yunnan ObservatoriesCN679 papers
- Shanghai Astronomical ObservatoryCN633 papers
- Beijing Normal UniversityCN629 papers
- Purple Mountain ObservatoryCN616 papers
- Tsinghua UniversityCN578 papers
- Kavli Institute for Theoretical SciencesCN552 papers
- Nanjing UniversityCN462 papers
- Center for Astrophysics Harvard & SmithsonianUS455 papers
21 papers · 2 filters
On the spatial distribution and the origin of hypervelocity stars
Youjun Lu, Fupeng Zhang, Qingjuan Yu
Hypervelocity stars (HVSs) escaping away from the Galactic halo are dynamical products of interactions of stars with the massive black hole(s) (MBH) in the Galactic Center (GC). Th…
The orbits of open clusters in the Galaxy
Zhen-Yu Wu, Xu Zhou, Jun Ma +1
We present and analyze kinematics and orbits for a sample of 488 open clusters in the Galaxy. The velocity ellipsoid for our present sample is derived as (, , $σ_{W})…
Simulated SKA maps from Galactic 3D-emission models
X. H. Sun, W. Reich
(Abridged) We present maps for various Galactic longitudes and latitudes at 1.4 GHz, which is the frequency where deep SKA surveys are proposed. The maps are about 1.5 deg in size…
Narrow double-peaked emission lines of SDSS J131642.90+175332.5: signature of a single or a binary AGN in a merger, jet-cloud interaction, or unusual narrow-line region geometry
Dawei Xu, S. Komossa
We present an analysis of the active galaxy SDSS J131642.90+175332.5, which is remarkable because all of its narrow emission lines are double-peaked, and because it additionally sh…
Binaries of massive black holes in rotating clusters: Dynamics, gravitational waves, detection and the role of eccentricity
Pau Amaro-Seoane, Christoph Eichhorn, Edward K. Porter +1
The dynamical evolution of binaries of intermediate-massive black holes (IMBHs, massive black holes with a mass ranging between and ) in stellar clusters has…
Eddington ratio governs the equivalent width of MgII emission line in active galactic nuclei
Xiao-Bo Dong, Ting-Gui Wang, Jian-Guo Wang +4
We have investigated the ensemble regularities of the equivalent widths (EWs) of MgII 2800 emission line of active galactic nuclei (AGNs), using a uniformly selected sample of 2092…
Chemical Compositions of Kinematically Selected Outer Halo Stars
Lan Zhang, Miho Ishigaki, Wako Aoki +2
Chemical abundances of 26 metal-poor dwarfs and giants are determined from high-resolution and high signal-to-noise ratio spectra obtained with Subaru/HDS. The sample is selected s…
General Polytropic Magnetofluid under Self-Gravity: Voids and Shocks
Yu-Qing Lou, Ren-Yu Hu
We study the self-similar magnetohydrodynamics (MHD) of a quasi-spherical expanding void (viz. cavity or bubble) in the centre of a self-gravitating gas sphere with a general polyt…
Major Dry-Mergers In Early-Type Brightest Cluster Galaxies
F. S. Liu, Shude Mao, Z. G. Deng +2
We search for ongoing major dry-mergers in a well selected sample of local Brightest Cluster Galaxies (BCGs) from the C4 cluster catalogue. 18 out of 515 early-type BCGs with redsh…
Radio properties of the low surface brightness SNR G65.2+5.7
L. Xiao, W. Reich, E. Fürst +1
Many physical properties of this SNR such as spectrum and polarization can only be investigated by radio observations. The 11 cm and 6\ cm continuum and polarization observat…
N-body simulations for testing the stability of triaxial galaxies in MOND
Xufen Wu, HongSheng Zhao, Yougang Wang +2
We perform a stability test of triaxial models in MOdified Newtonian Dynamics (MOND) using N-body simulations. The triaxial models considered here have densities that vary with $r^…
A Study of Active Galactic Nuclei in Low Surface Brightness Galaxies with Sloan Digital Sky Survey Spectroscopy
Lin Mei, Weimin Yuan, Xiaobo Dong
Active galactic nuclei (AGN) in low surface brightness galaxies (LSBGs) have received little attention in previous studies. In this paper, we present detailed spectral analysis of…
What controls the Fe II strength in active galactic nuclei?
Xiaobo Dong, Jianguo Wang, Luis C. Ho +5
We used a large, homogeneous sample of 4178 z <= 0.8 Seyfert 1 galaxies and QSOs selected from the Sloan Digital Sky Survey to investigate the strength of Fe II emission and its co…
The spiral structure of our Milky Way Galaxy
L. G. Hou, J. L. Han, W. B. Shi
The spiral structure of our Milky Way Galaxy is not yet known. HII regions and giant molecular clouds are the most prominent spiral tracers. We collected the spiral tracer data of…
Ultra-cool dwarfs: new discoveries, proper motions, and improved spectral typing from SDSS and 2MASS photometric colors
Z. H. Zhang, R. S. Pokorny, H. R. A. Jones +6
Aims. We try to identify ultra-cool dwarfs from the seventh Data Release of the Sloan Digital Sky Survey (SDSS DR7) with SDSS i-z and r-z colors. We also obtain proper motion data…
Magnetic structure of our Galaxy: A review of observations
J. L. Han
The magnetic structure in the Galactic disk, the Galactic center and the Galactic halo can be delineated more clearly than ever before. In the Galactic disk, the magnetic structure…
A Catalog of Moving Group Candidates in The Solar Neighborhood
Jingkun Zhao, Gang Zhao, Yuqin Chen
Based on the kernel estimator and wavelet technique, we have identified 22 moving group candidates in the solar neighborhood from a sample which includes around 14,000 dwarfs and 6…
NTT, Spitzer and Chandra spectroscopy of SDSSJ095209.56+214313.3: the most luminous coronal-line supernova ever observed, or a stellar tidal disruption event ?
S. Komossa, H. Zhou, A. Rau +9
The galaxy SDSSJ0952+2143 showed remarkable emission-line properties first reported in 2008 (paper I), which are the consequence of a powerful high-energy flare. Here we report fol…
Estimating the H I gas fractions of galaxies in the local Universe
Wei Zhang, Cheng Li, Guinevere Kauffmann +5
We use a sample of 800 galaxies with H I mass measurements from the HyperLeda catalogue and optical photometry from the fourth data release of the Sloan Digital Sky Survey to calib…
An Orbit Fit for the Grillmair Dionatos Cold Stellar Stream
Benjamin A. Willett, Heidi Jo Newberg, Haotong Zhang +2
We use velocity and metallicity information from SDSS and SEGUE stellar spectroscopy to fit an orbit to the narrow stellar stream of Grillmair and Dionatos. The stars in…
Optical Variability of the Radio Source J 1128+5925 -- II. Confirmation of its Optical Quietness
Jianghua Wu, Xu Zhou, Jun Ma +3
The source J 1128+5925 was found recently to show strong intraday variability at radio wavelengths and its radio variability may come from interstellar scintillation. In optical, t…