Research
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2024.09.12
Supermassive black holes in the Universe
Supermassive black holes are extensively discussed in this talk: 1) cosmic evolution of SMBHs; 2) masses and spins; 3) SMBH binaries and nano-Hz gravitational waves; 4) Satellite black holes around SMBH; 5) new opportunity of SMBH research in the JWST and VLTI era.BIOJianming Wang is astrophysics professor in IHEP. He got PhD in USTC in 1995 and originally from National University of Defense Te...
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2024.06.20
Towards a Unified Story for Planet Formation
While the exoplanetary field is replete with remarkable discoveries, perhaps the two most intriguing findings have been the detection of hot Jupiters – giant planets orbiting perilously close to their parent stars, and the startling abundance of super-Earths. The mere existence of these worlds was wholly unpredicted based on the expectations that were gleaned from centuries of observation of o...
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2024.06.13
Weak lensing cosmology beyond two-point shear correlations
With the fast development of high-precision large photometric surveys, weak lensing (WL) effects have become one of the major probes in cosmology. While the two-point shear correlations are the most extensively employed analyses, other statistics beyond that are desired because of the non-Gaussian nature of cosmic structures. In this presentation, I will discuss the cosmological application of ...
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2024.06.06
From Subaru to WFST: The Past, Present, and Future of Fast Transient Studies
Transients with fast brightness variance in UV/optical wavelengths ("fast transients," such as early-phase supernovae, fast blue optical transients, kilonovae) are of great interest in astronomy. Although great progresses in time-domain astronomy have been made via wide, shallow, and day(s)-cadence surveys, the limited observing depth and low time resolution make traditional time-domain surveys...
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2024.05.30
New windows in X-ray astronomy opened by eROSITA all-sky surveys
30 years after the ROSAT all-sky survey (1990), eROSITA performed X-ray all-sky surveys again in 2020-2022, in which 90% of the sky was observed in the X-ray band with high resolution for the first time. The eROSITA all-sky surveys (eRASSs) will detect millions of AGNs and tens of thousands of galaxy clusters and open a large space of discoveries. I will introduce eRASS and three research topic...
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