科学研究
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2024.02.23
Illuminating the Cosmic Web and the Circumgalactic Medium with the help of quasars
Our standard cosmological model predicts that most of the matter in the universe is distributed into a network of filaments - the Cosmic Web - in which galaxies form and evolve. Because most of this material is too diffuse to form stars, its direct detection in emission has remained elusive for several decades leaving fundamental questions still open, including: How are galaxies linked to each ...
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2024.02.23
The impact of massive stars and black holes on the dynamical evolution of star clusters
Massive stars have a significant impact on the dynamical evolution of star clusters. They play a crucial role during star formation, as their radiation can push surrounding gas away and inhibit further star formation. Additionally, strong mass loss from massive stars via strong winds can rapidly reduce the gravitational potential of star clusters and trigger their fast expansion. Once these mas...
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2024.02.23
A polarized view of the pulsar wind nebulae with IXPE
Pulsar wind nebulae (PWNe) are powerful sources of non-thermal X-ray radiation, which is intrinsically polarized due to synchrotron emission. The magnetic field strength and structure in these sources play a crucial role in shaping their dynamics, energetics and evolution, as well as in accelerating particles to very high energies. X-ray polarimetry can provide unique insights into understandin...
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2024.02.23
Interstellar X-ray Dust Scattering: Current Research and Future Prospects
Our Universe is pervaded with X-ray sources. When X-ray photons traverse through interstellar space, they can be scattered by dust particles floating in space, producing scattering rings and halos around X-ray sources. This scattering effect can be used to study the distribution of interstellar dust, as well as the size distribution, composition and structure of dust grains. It also affects the...
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2024.02.23
A hydrodynamic study of the atmospheric escape of the hot Jupiter WASP-121b
The escape of the atmosphere plays a crucial role in planetary evolution. Recent advancements in high spectral resolution transmission spectrum observation have provided an exceptional opportunity to investigate the structure of exoplanet upper atmospheres and their escape processes. In this talk, I will introduce a sophisticated forward model by expanding the capability of a one-dimensional mo...
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