29 citations · 132 across the 14 of their papers we have counts for
14 papers
SN 2021pfs: A Type Ia Supernova Likely Affected by Progenitor Metallicity, as Revealed by Comparison with Its Twin Counterpart
Abdusamatjan Iskandar, Xiaofeng Wang, Ali Esamdin +16
We present extensive photometric and spectroscopic observations of the normal type Ia supernovae (SNe Ia) 2021pfs, which occurred in the Seyfert 2 galaxy NGC 5427 at a redshift 0.0…
AT 2024wpp: the most luminous fast-evolving optical transient linked to the merger explosion of a black-hole binary
Jialian Liu, Bao Wang, Xiaofeng Wang +48
Fast blue optical transients (FBOTs) represent one of the most exotic astrophysical transients, exhibiting unusually strong emission across X-ray, optical, and radio wavelengths. T…
SN 2021hpr: A Normal Type Ia Supernova Showing Excess Emission in the Early Rising Phase
Abdusamatjan Iskandar, Xiaofeng Wang, Ali Esamdin +37
We present extensive optical observations of a nearby Type Ia supernova (SN Ia), SN 2021hpr, located in the spiral galaxy NGC 3147 at a distance of 45 Mpc. Our observations…
Implications for the Explosion Mechanism of Type Ia Supernovae from their Late-time Spectra
Jialian Liu, Xiaofeng Wang, Alexei V. Filippenko +10
Late-time spectra of Type Ia supernovae (SNe Ia) are important in clarifying the physics of their explosions, as they provide key clues to the inner structure of the exploding whit…
Properties and Asteroseismological analysis of a new ZZ ceti discovered by TMTS
Jincheng Guo, Yanhui Chen, Xiaofeng Wang +24
Tsinghua university-Ma Huateng Telescope for Survey (TMTS) aims to discover rapidly evolving transients by monitoring the northern sky. The TMTS catalog is cross-matched with the w…
An 18.9-minute Blue Large-Amplitude Pulsator Crossing the 'Hertzsprung Gap' of Hot Subdwarfs
Jie Lin, Chengyuan Wu, Xiaofeng Wang +28
Blue large-amplitude pulsators (BLAPs) represent a new and rare class of hot pulsating stars with unusually large amplitudes and short periods. Up to now, only 24 confirmed BLAPs h…
Searching for Variable Stars in the Open Cluster NGC 2355 and Its Surrounding Region
Hong Wang, Yu Zhang, Xiangyun Zeng +4
We have investigated the variable stars in the field surrounding NGC 2355 based on the time-series photometric observation data. More than 3000 CCD frames were obtained in the V ba…
Observations of the Very Young Type Ia Supernova 2019np with Early-excess Emission
Hanna Sai, Xiaofeng Wang, Nancy Elias-Rosa +30
Early-time radiative signals from type Ia supernovae (SNe Ia) can provide important constraints on the explosion mechanism and the progenitor system. We present observations and an…
KIC 12602250: A low-amplitude Double-mode Scuti star with Amplitude Modulation
Chenlong Lv, Ali Esamdin, Xiangyun Zeng +3
We propose for the first time that KIC 12602250 is a low-amplitude radial double-mode Scuti star with amplitude modulation. The detailed frequency analysis is given for the lig…
SN 2017fgc: A Fast-Expanding Type Ia Supernova Exploded in Massive Shell Galaxy NGC 474
Xiangyun Zeng, Xiaofeng Wang, Ali Esamdin +31
We present extensive optical photometric and spectroscopic observations of the high-velocity (HV) Type Ia supernova (SN Ia) 2017fgc, covering the phase from 12 d before to $…
Deciphering Star Cluster Evolution by Shape Morphology
Qingshun Hu, Yu Zhang, Ali Esamdin +2
We analyze the morphological evolution of open clusters and provide shape parameters for 265 open clusters. The results show that the overall shape of sample clusters becomes more…
SN 2017hpa: A Nearby Carbon-Rich Type Ia Supernova with a Large Velocity Gradient
Xiangyun Zeng, Xiaofeng Wang, Ali Esamdin +24
We present extensive, well-sampled optical and ultraviolet photometry and optical spectra of the Type Ia supernova (SN Ia) 2017hpa. The light curves indicate that SN 2017hpa is a n…
Investigating Variable Stars in the Open Cluster NGC 1912 and Its Surrounding Field
Chunyan Li, Ali Esamdin, Yu Zhang +6
In this work, we studied the variable stars in the open cluster NGC 1912 based on the photometric observations and DR2 data. More than 3600 CCD frames in B, V, R filters wer…
A Weak Modulation Effect Detected in the Light Curves of KIC 5950759: Intrinsic or Instrumental Effect?
Taozhi Yang, A. Esamdin, Fangfang Song +8
In this paper, the high-precision light curves of target KIC 5950759 are analyzed. The Fourier analysis of the long cadence light curve reveals 3 independent frequencies.…