A5020856284- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Galaxies: Formation, Evolution, Phenomena
- Gamma-ray bursts and supernovae
- Astronomical Observations and Instrumentation
- Astrophysics and Star Formation Studies
- Muon and positron interactions and applications
- Radiation Detection and Scintillator Technologies
- Neutrino Physics Research
- Astrophysical Phenomena and Observations
- Geophysics and Gravity Measurements
- Atomic and Molecular Physics
- Advanced Chemical Physics Studies
- CCD and CMOS Imaging Sensors
- Scientific Research and Discoveries
- Cosmology and Gravitation Theories
- Calibration and Measurement Techniques
National Astronomical Observatories
2022-2025
Chinese Academy of Sciences
2022-2025
Astronomy and Space
2025
University of Chinese Academy of Sciences
2022-2025
Beijing Planetarium
2024
Ludong University
2020-2021
Abstract Changing-look active galactic nuclei (CL AGNs) can be generally confirmed by the emergence (turn-on) or disappearance (turn-off) of broad emission lines (BELs), associated with a transient timescale (about 100 ∼ 5000 days) that is much shorter than predicted traditional accretion disk models. We carry out systematic CL AGN search crossmatching spectra coming from Dark Energy Spectroscopic Instrument and Sloan Digital Sky Survey. Following previous studies, we identify AGNs based on...
Abstract Extremely metal-poor galaxies (XMPGs) at relatively low redshift are excellent laboratories for studying galaxy formation and evolution in the early universe. Much effort has been spent on identifying them from large-scale spectroscopic surveys or follow-up observations. Previous work identified a few hundred XMPGs. In this work, we obtain large sample of 223 XMPGs z < 1 data Dark Energy Spectroscopic Instrument (DESI). The oxygen abundance is determined using direct T e method...
The measurement of cosmological distances using baryon acoustic oscillations (BAO) is crucial for studying the universe's expansion. Chinese Space Station Telescope (CSST) galaxy redshift survey, with its vast volume and sky coverage, provides an opportunity to address key challenges in cosmology. However, uncertainties surveys can degrade both angular radial distance estimates. In this study, we forecast precision BAO measurements mock CSST samples, applying a two-point correlation function...
Abstract The China Space Station Telescope (CSST) is a forthcoming space-based optical telescope designed to co-orbit with the Chinese Station. With planned slitless spectroscopic survey spanning broad wavelength range of 255 − 1000 nm and an average spectral resolution exceeding 200, CSST holds significant potential for cosmic large-scale structure analysis. In this study, we focus on redshift determinations from spectra through emission line analysis within framework. Our tailored...
Abstract In this study, we present the construction of a new proper-motion catalog utilizing photometric data from Sloan Digital Sky Survey (SDSS) and Dark Energy Spectroscopic Instrument (DESI) imaging surveys, with median time baseline about 13 yr. To mitigate systematic errors, DESI galaxy positions are employed to establish reference frame correct position-, magnitude-, color-dependent discrepancies between SDSS sets. Spanning 12,589 deg 2 , encompasses 223.7 million non-Gaia objects...
Abstract We present the identification of changing-look active galactic nuclei (CL-AGNs) from Dark Energy Spectroscopic Instrument First Data Release and Sloan Digital Sky Survey 16 at z ≤ 0.9. To confirm CL-AGNs, we utilize spectral flux calibration assessment via an [O iii ]-based calibration, pseudophotometry examination, visual inspection. This rigorous selection process allows us to compile a statistical catalog 561 encompassing 527 H β , 149 α 129 Mg ii CL behaviors. In this sample,...
Photometric redshift (photo-z) is a fundamental parameter for multi-wavelength photometric surveys, while galaxy clusters are important cosmological probers and ideal objects exploring the dense environmental impact on evolution. We extend our previous work estimating photo-z detecting to latest data releases of Dark Energy Spectroscopic Instrument (DESI) imaging Survey (DES), Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) surveys make corresponding catalogs publicly available more...
We present the identification of changing-look active galactic nuclei (CL-AGNs) from Dark Energy Spectroscopic Instrument First Data Release and Sloan Digital Sky Survey 16 at z \leq 0.9. To confirm CL-AGNs, we utilize spectral flux calibration assessment via an [O\,{\sc iii}]-based calibration, pseudo-photometry examination, visual inspection. This rigorous selection process allows us to compile a statistical catalog 561 encompassing 527 $\rm H\beta$, 149$\rm H\alpha$, 129 Mg II CL...
Abstract We have conducted photometric and spectroscopic observations of the peculiar Type Ia supernova (SN Ia) 2016ije that was discovered through Tsinghua-NAOC Transient Survey. This object exploded in outskirts a metal-poor, low-surface brightness galaxy (i.e., M g = −14.5 mag). Our analysis reveals SN is subluminous ( <?CDATA ${M}_{B,\max }$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi>M</mml:mi> </mml:mrow>...
Abstract Green-pea galaxies are a special class of star-forming compact with strong [O iii ] λ 5007 and considered as analogs high-redshift Ly α -emitting potential sources for cosmic reionization. In this paper, we identify 76 at z < 0.35 from DR16 the Sloan Digital Sky Survey. These present relatively low stellar mass, high star-formation rate, metallicity. Both main-sequence (SFMS) relation mass–metallicity (MZR) investigated compared green-pea blueberry collected literature. It is...
Changing-look Active Galactic Nuclei (CL AGN) can be generally confirmed by the emergence (turn-on) or disappearance (turn-off) of broad emission lines, associated with a transient timescale (about $100\sim5000$ days) that is much shorter than predicted traditional accretion disk models. We carry out systematic CL AGN search cross-matching spectra coming from Dark Energy Spectroscopic Instrument and Sloan Digital Sky Survey. Following previous studies, we identify based on $\rm{H}\alpha $,...
Extremely metal-poor galaxies (XMPGs) at relatively low redshift are excellent laboratories for studying galaxy formation and evolution in the early universe. Much effort has been spent on identifying them from large-scale spectroscopic surveys or follow-up observations. Previous work identified a few hundred XMPGs. In this work, we obtain large sample of 223 XMPGs $z<1$ data Dark Energy Spectroscopic Instrument (DESI). The oxygen abundance is determined using direct $T_{\rm e}$ method based...
In this study, we present the construction of a new proper motion catalog utilizing photometric data from Sloan Digital Sky Survey (SDSS) and Dark Energy Spectroscopic Instrument (DESI) imaging surveys, with median time baseline about 13 years. To mitigate systematic errors, DESI galaxy positions are employed to establish reference frame correct position-, magnitude-, color-dependent discrepancies between SDSS datasets. Spanning 12,589 square degrees, encompasses 206.6 million non-Gaia...
We have conducted photometric and spectroscopic observations of the peculiar Type Ia supernova (SN Ia) 2016ije that was discovered through Tsinghua-NAOC Transient Survey. This object exploded in outskirts a metal-poor, low-surface brightness galaxy (i.e., $M_{g}$ = $-$14.5 mag). Our analysis reveals SN is subluminous ($M_{B,\rm{max}}$ $-$17.65$\pm$0.06 mag) but exhibits relatively broad light curves ($Δm_{15}(B)$ 1.35$\pm$0.14 mag), similar to behavior 2002es. bolometric curve indicates only...