A5103088771- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- Solar and Space Plasma Dynamics
- Calibration and Measurement Techniques
- Optical Polarization and Ellipsometry
- Adaptive optics and wavefront sensing
University of Chinese Academy of Sciences
2024
Abstract The Lobster Eye Imager for Astronomy (LEIA) detected a new X-ray transient on 2022 November 7, identified as superflare event occurring nearby K-type giant star HD 251108. flux increase was also in follow-up observations at X-ray, UV, and optical wavelengths. flare lasted about 40 days soft observations, reaching peak luminosity of ∼1.1 × 10 34 erg s −1 0.5–4.0 keV, which is roughly 60 times the quiescent luminosity. Optical brightening observed only one night. light curve well...
We present the analysis of 15 X-ray observations Mrk 477, a nearby Seyfert 2 active galactic nucleus, with objective to monitor its obscuring column density variability. The full dataset consists five archival observations, split into two XMM-Newton, NuSTAR and one Chandra observation, plus dedicated monitoring campaigns. campaigns were performed Swift-XRT NuSTAR, containing each. simultaneous using self-consistent torus models, deriving geometric properties as well obscuration along line...
Most of the supermassive black holes in Universe accrete material an obscured phase. While it is commonly accepted that ``dusty torus'' responsible for nuclear obscuration, its geometrical, physical, and chemical properties are far from being properly understood. In this paper, we take advantage multiple X-ray observations taken between 2007 2020, as well optical to infra-red (FIR) NGC 6300, a nearby (z=0.0037) Seyfert 2 galaxy. The goal project study emission obscuring medium, through...
Abstract Stellar activity cycles reveal continuous relaxation and induction of magnetic fields. The cycle is typically traced through the observation cyclic variations in total brightness or Ca H&K emission flux stars, as well orbital periods binary systems. In this work, we report identification a semidetached system (TIC 16320250) consisting white dwarf (0.67 M ⊙ ) an active (0.56 ). long-term multiband optical light curves spanning twenty years revealed three repeated patterns,...
Most of the super-massive black holes in Universe accrete material an obscured phase. While it is commonly accepted that "dusty torus" responsible for nuclear obscuration, its geometrical, physical, and chemical properties are far from being properly understood. In this paper, we take advantage multiple X-ray observations taken between 2007 2020, as well optical to infra-red (FIR) NGC 6300, a nearby ($z=0.0037$) Seyfert 2 galaxy. The goal project study emission obscuring medium, through...
Abstract We report the discovery of a close binary J0606+2132 (Gaia DR3 3423365496448406272) with P obs = 2.77 days containing possible massive white dwarf (WD) or neutron star (NS) using LAMOST spectroscopic data. By joint fitting radial velocity from and light curve TESS, we derived circular Keplerian orbit an inclination i 81.°31 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msubsup> <mml:mrow/> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>7.85</mml:mn>...