Research
-
2022.12.22
Towards kHz Gravitational Wave Astronomy
Gravitational wave has become a new window to explore our universe. Among many events detected so far, GW170817 was the first binary neutron star gravitational wave event joint with electromagnetic observations, which revolutionized our understanding of neutron star physics and the origin of kilonova. However, due to a limited detector sensitivity at the high frequency around kHz, we did not ob...
More -
2022.12.15
Solar coronal waves: A debate for two decades
In 1997, the EIT telescope aboard the SOHO satellite (from NASA and ESA) discovered a global-scale wave phenomenon associated with solar flares, which was then called “EIT waves” or “solar tsunamis”. The physical nature of “EIT waves” has been debated for decades. The speaker will try to provide an overview of the related research, including recent progress.BIOPeng-Fei Chen is a solar phy...
More -
2022.12.01
Unveiling the astrophysics of cosmic reionization in the post-reionization era
Cosmic reionization is the last major phase transition that our Universe goes through. In this milestone, the intergalactic medium transitions from primarily neutral, dark, and cold into mainly ionized, more luminous, and warmer. However, as exciting as the reionization process surely was, many aspects remain unknown, e.g. what are the sources of the ionizing photons? or what is the timeline of...
More -
2022.11.24
Multi-phase gas, accretion, and mechanical AGN feedback in early-type galaxies
Most galaxies comparable to or larger than the mass of the Milky Way host hot, X-ray emitting atmospheres and central radio sources. Hot atmospheres and radio jets and lobes are the ingredients of radio-mechanical active galactic nucleus (AGN) feedback. About half of the most massive early type galaxies harbour multi-phase filamentary gas, which appears to result from the thermally unstable coo...
More -
2022.11.17
Cosmology with spectroscopic surveys
Modern cosmology is an observational driven science. Two dark components, dark matter and dark energy, are introduced to explain the invisible mass inferred from various astrophysical observations and the accelerated expansion of the Universe. They represent around 95% of the total mass-energy budget of the Universe today. However, little is known about their nature.As a result of the competiti...
More