14 citations · 30 across the 8 of their papers we have counts for
8 papers
Probing Periodic and Aperiodic Variability of X-ray Sources in M31, M81 and Centaurus A with Chandra
Jiachang Zhang, Zhiyuan Li, Ziqian Hua +1
Based on archival Chandra observations, we present a systematic timing survey of several hundred X-ray sources in M31, M81, and Centaurus A, mostly low-mass X-ray binaries (LXMBs),…
Is the Peculiar Galactic Center Transient Swift J174610.4-290018 A Nova Outburst?
Ziqian Hua, Zhiyuan Li, Zhao Su
Swift J174610.4-290018 is a peculiar transient X-ray source in the Galactic center. First detected by Swift at the onset of an outburst in February 2024, it has since been observed…
A multiwavelength study of the Galactic center black hole candidate MAXI J1744-294
Shifra Mandel, Kaya Mori, Paul A. Draghis +37
For the first time in nearly a decade, a bright transient was detected in the central parsec (pc) of the Galaxy. MAXI J1744-294, or -- as it was known in its previous life -- Swift…
Chandra X-ray Measurement of Heavy Element Abundances of Wolf-Rayet Stars in the Galactic Center
Ziqian Hua, Zhiyuan Li
Elemental abundances hold important information about the star formation history in the Galactic Center. The thermal X-ray spectra of certain stars can provide a robust probe of el…
A universal break in energy functions of three hyperactive repeating fast radio bursts
Q. Wu, F. Y. Wang, Z. Y. Zhao +16
Fast radio bursts (FRBs) are millisecond-duration pulses occurring at cosmological distances with a mysterious origin. Observations show that at least some FRBs are produced by mag…
A Statistical Study of Soft X-ray Flares on Solar-type Stars
Zhanhao Zhao, Ziqian Hua, Xin Cheng +2
The statistical characteristic of stellar flares at optical bands has received an extensive study, but it remains to be studied at soft X-ray bands, in particular for solar-type st…
Hydrodynamic Evolution of Sgr A East: The Imprint of A Supernova Remnant in the Galactic Center
Mengfei Zhang, Zhiyuan Li, Ziqian Hua Mark R. Morris
We perform three-dimensional numerical simulations to study the hydrodynamic evolution of Sgr A East, the only known supernova remnant (SNR) in the center of our Galaxy, to infer i…
Chandra X-ray Measurement of Gas-phase Heavy Element Abundances in the Central Parsec of the Galaxy
Ziqian Hua, Zhiyuan Li, Mengfei Zhang +2
Elemental abundances are key to our understanding of star formation and evolution in the Galactic center. Previous work on this topic has been based on infrared (IR) observations,…