科学研究
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2023.09.08
Eruptive YSOs in the large-survey era
The Pre-Main-Sequence stellar evolution is shaped by the mass accretion process, which is known for its highly unstable nature. In fact, most of the stellar mass is gathered during "episodic accretion" bursts, which solved the luminosity spread of young clusters. As a consequence of the accretion bursts, eruptive behaviours have been observed on Young Stellar Objects (YSO), such as the decades-...
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2023.09.07
Probing Galaxy Formation in the Cosmic Web at z~3: A View with the James Webb Space Telescope
Galaxies are not isolated islands in the Universe. Across the cosmic time, they assemble and evolve while frequently interacting with the ambient cosmic gas, namely the circum- and inter-galactic media (CGM/IGM), which belongs to the large-scale structure named the cosmic web. However, specifically what roles this large-scale environment plays in galaxy formation remains as a key open question ...
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2023.08.30
eROSITA All Sky Survey: X-ray emission around galaxies
Studying the distribution and properties of hot gas around galaxies (hot CGM) is helpful to understand the galaxy evolution and explain the bi-modality of the galaxy population, but its observation is challenging. In my talk, I will introduce how eROSITA X-ray all-sky survey allow us to study the hot CGM with a large sample of galaxies and provide more general relationship between CGM and galax...
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2023.08.24
Uncovering the Formation and Evolution of Planetary Systems: The Architecture of Hot Jupiter Systems and the Search for Young Planets
The formation and evolution of planetary systems are critical links in understanding how we came to be. With an eye on exoplanet demography, my talk outlines two observational approaches for studying planet formation and evolution. In the first approach, I focus on the aftermath of planet formation by estimating the occurrence rate of hot jupiters with an inner companion planet through a system...
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2023.08.21
Active Galactic Nuclei in the NuSTAR Era
Active galactic nuclei (AGN), which represent the rapidly growing phase of the supermassive black holes (SMBH), radiate across the whole electromagnetic spectrum fromradio to Gamma-rays. X-rays, which are seen in most AGN, are an important tool to study the physics of AGN. Thanks to the launch of NuSTAR in 2012, we are able to probe AGN properties in the hard X-ray regime for the first time. In...
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