About Us

We are the astrophysics laboratory at the Department of Physics, National Changhua University of Education, Taiwan. Our research focuses on the following topics

1. Non-linear and non-stationary phenomena in astrophysics

   • Long-term X-ray modulation in X-ray binaries and ultraluminous X-ray sources

   • Quasi-periodic oscillation from the innermost accretion disk in X-ray binaries and active galactic nuclei

   • Transient and continuous gravitational-wave signals

   • Follow-up observations of fast radio bursts

2. Effects of high magnetic fields and high accretion rates on compact objects

   • Timing and spectral behaviors of magnetars and high-magnetic field pulsars

   • Disk-magnetosphere interaction in ultraluminous X-ray pulsars

   • Particle acceleration in pulsar winds

3. Instrumentation and mathematical algorithms

   • Development and application of advanced timing and time-frequency analysis and astrostatistics

   • X-ray CubeSats (we join the NinjaSat project led by RIKEN)

We are interested in developing new data analysis techniques, especially timing and time-frequency analysis, and applying advanced techniques in astronomical data. Our main research topics are around compact objects, including black hole and neutron stars and their environments. We use data taken from X-ray observatories like Chandra, XMM-Newton, Neil Gehrels Swift, NICER, and MAXI to study the timing and spectral behaviors of galactic X-ray binaries, isolated pulsar and magnetars, and ultraluminous X-ray sources in external galaxies. We also perform multi-wavelength studies with optical data taken from ASAS-SN, TESS, ZTF, CRTS, Lulin observatory, and radio observations. Recently, we started to work on gravitational wave data taken by LIGO and theoretical waveforms from core-collapse supernovae, and follow-up observations of fast-radio bursts.