Research
-
2023.03.30
Not only astrophysics: fundamental physics studies with high energy missions
There are no doubts that high energy astrophysics has opened new views on the Universe and on the many classes of sources that populates the hot and energetic sky. However, in the near future, spectral, timing, and polarimetric observations at high energies are expected to address key scientific questions in fundamental physics.In this seminar, I will first briefly summarise the potential of hi...
More -
2023.03.24
Models for binary-neutron-star mergers in the multi-messenger era
It has been more than half a decade since the first joint detection of gravitational wave and its electromagnetic counterparts (GW170817). The physical models on binary-neutron-star (BNS) mergers are continuously challenged by the ongoing observational facts and the progress in simulation. I will be briefly reviewing the history of models for BNS mergers and presenting the efforts we have made ...
More -
2023.03.23
Active Galactic Nuclei: Monsters to Scale or Puzzles to Solve?
Active Galactic Nuclei (AGNs) are the brightest sources of electromagnetic radiation in the universe, enabling us to observe them across the cosmos. AGNs are the central parts of galaxies.Most of their brightness results from the accretion of matter by a supermassive black hole (SMBH) at their center. Studying the AGNs informs us about the role of SMBHs in the formation and evolution of galaxie...
More -
2023.03.17
Changing-look AGNs in the Dark Energy Spectroscopic Instrument (DESI)
Changing-look (CL) phenomenon can be generally confirmed by the emergence or disappearance of Broad Emission Line, which challenge the understanding of AGN unification paradigm and accretion disk model. Dark Energy Spectroscopic Instrument (DESI) provides a unique opportunity to systematical study CL-AGNs, which enable us to investigate it by cross-matching the spectra of DESI early data and SD...
More -
2023.03.16
Microphysical and non-thermal processes in the circumgalactic medium: turbulence, magnetic fields and cosmic rays
Multiphase gas structure is ubiquitous in our universe. Recent observations suggest that large quantities of cool (10^4 K) gas are detected in the circumgalactic medium (CGM) of galaxy halos, which extends up to a few times of galactic virial radius. In addition, warm gas at a few 10^5 K is found to be tightly associated with the star-forming galaxies, but not the quenched ones. However, the or...
More