111 citations · 497 across the 18 of their papers we have counts for
18 papers
A small scale structure model of jet based on the observation of microvariability
Jingran Xu, Shaoming Hu, Xu Chen +2
We developed a multi-region radiation model for the evolution of flux and spectral index with time. In this model, each perturbation component in the jet produces an independent fl…
Spectroscopic evidence for a large spot on the dimming Betelgeuse
Sofya Alexeeva, Gang Zhao, Dong-Yang Gao +4
During October 2019 and March 2020, the luminous red supergiant Betelgeuse demonstrated an unusually deep minimum of its brightness. It became fainter by more than one magnitude an…
A possible tidal disruption event candidate in the black hole binary system of OJ 287
Shifeng Huang, Shaoming Hu, Hongxing Yin +4
The BL Lacertae OJ 287 is a supermassive black holes binary (SMBHB) system with complex physics of its irregular flares. During 2016 October -- 2017 April period, a surprising outb…
Simulating Photometric Images of Moving Targets with Photon-mapping
Junju Du, Shaoming Hu, Xu Chen +2
We present a novel, easy-to-use method based on the photon-mapping technique to simulate photometric images of moving targets. Realistic images can be created in two passes: photon…
Photometric study and absolute parameters estimation of six totally eclipsing contact binaries
Kai Li, Qi-Qi Xia, Chun-Hwey Kim +6
High precision CCD observations of six totally eclipsing contact binaries were presented and analyzed. It is found that only one target is an A-type contact binary (V429 Cam), whil…
The first light curve modeling and orbital period change investigation of nine contact binaries around the short period cut-off
Kai Li, Chun-Hwey Kim, Qi-Qi Xia +5
In this paper, we present the first light curve synthesis and orbital period change analysis of nine contact binaries around the short period limit. It is found that all these syst…
Spitzer + VLTI-GRAVITY Measure the Lens Mass of a Nearby Microlensing Event
Weicheng Zang, Subo Dong, Andrew Gould +24
We report the lens mass and distance measurements of the nearby microlensing event TCP J05074264+2447555. We measure the microlens parallax vector using Spitzer and gro…
The NLTE Analyses of Carbon Emission Lines in the Atmospheres of O and B type Stars
Sofya Alexeeva, Kozo Sadakane, Masayoshi Nishimura +2
We present a model atom for C I - C II - C III - C IV using the most up-to-date atomic data and evaluated the non-local thermodynamic equilibrium (NLTE) line formation in classical…
Statistical analysis of micro-variability properties of the blazar S5 0716+714
Jingran Xu, Shaoming Hu, James R. Webb +5
The typical blazar S5 0716714 is very interesting due to its rapid and large amplitude variability and high duty cycle of micro-variability in optical band. We analyze the obser…
Photometric investigations on two totally eclipsing contact binaries: V342 UMa and V509 Cam
Kai Li, Qi-Qi Xia, Jin-Zhong Liu +6
By analyzing two sets of complete light curves of V342 UMa and three sets of complete light curves of V509 Cam, we determined that the two systems are both W-…
Contact binaries at the short period cut-off I. statistics and the first photometric investigations of ten totally eclipsing systems
Kai Li, Qi-Qi Xia, Raul Michel +5
The period distribution of contact binaries exhibits a very sharp short period cut-off at 0.22 days. In order to provide valuable information on this short period limit, we observe…
Radio-loud AGN variability from three-dimensional propagating relativistic jets
Yutong Li, Paul J. Wiita, Terance Schuh +2
The enormous sizes and variability of emission of radio-loud AGNs arise from the relativistic flows of plasma along two oppositely directed jets. We use the Athena hydrodynamics co…
NLTE line formation for Mg\ione\ and Mg\ii\ in atmospheres of B-A-F-G-K stars
Sofya Alexeeva, Tatiana Ryabchikova, Lyudmila Mashonkina +1
Non-local thermodynamical equilibrium (NLTE) line formation for Mg I and Mg II lines is considered in classical 1D-LTE model atmospheres of the Sun and 17 stars with reliable atmos…
Locations of optical and -ray emitting regions in the jet of PMN J2345-1555
Yun-Guo Jiang, Shao-Ming Hu, Xu Chen +2
We collect long term -ray, optical and radio GHz light curves of quasar object PMN J2345-1555. The correlation analyses between them are performed via the local cross-corre…
Transiting Exoplanet Monitoring Project (TEMP). I. Refined System Parameters and Transit Timing Variations of HAT-P-29b
Songhu Wang, Xian-Yu Wang, Yong-Hao Wang +19
We report the photometry of six transits of the hot Jupiter HAT-P-29b obtained from 2013 October to 2015 January. We analyze the new light curves, in combination with the published…
Transiting Exoplanet Monitoring Project (TEMP). IV. Refined System Parameters, Transit Timing Variations and Orbital Stability of the Transiting Planetary System HAT-P-25
Xian-Yu Wang, Songhu Wang, Tobias C. Hinse +12
We present eight new light curves of the transiting extra-solar planet HAT-P-25b obtained from 2013 to 2016 with three telescopes at two observatories. We use the new light curves,…
Statistical analysis of variability properties of the Kepler blazar W2R 1926+42
Yutong Li, Shaoming Hu, Paul J. Wiita +1
We analyzed Kepler light curves of the blazar W2R 1926+42 that provided nearly continuous coverage from quarter 11 through quarter 17 (589 days between 2011 and 2013) and examined…
Transiting Exoplanet Monitoring Project (TEMP). III. On the Relocation of the Kepler-9~b Transit
Songhu Wang, Dong-Hong Wu, Brett C. Addison +24
The Kepler-9 system harbors three known transiting planets. The system holds significant interest for several reasons. First, the outer two planets exhibit a period ratio that is c…