科学研究
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2024.11.08
A study on Kinematical Small-scale Fluctuations Vary with Galaxy Surface Density
Massive galaxies usually observed as symmetric stellar motions and can be fitted well by the commonly used symmetric dynamical models. However, the stellar kinematics of many low-mass galaxies typically contain lots of small patches, causing the stellar second moment of velocity distribution to be non-smooth in small-scales and far from symmetry, we call these patches kinematical small-scale fl...
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2024.11.06
A chemical survey of exoplanet atmospheres with Ariel
TBD
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2024.11.06
Breeding seeds to grow supermassive black holes in the cosmological context: theory and semi-analytical forecasts
Supermassive black holes (SMBHs) are indispensable components of galaxy ecosystems. Their origin, growth, and feedback to the host galaxies are among the most fundamental questions in galaxy formation. In this talk, I will introduce a theoretical framework that coherently describes the formation of SMBHs from their seeding epoch to the present within the cosmological context. I will show that t...
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2024.11.01
Finding QPE-like systems in MOCCA simulation
QPE(Quasi Periodic Eruptions) is new type of X-ray transient event first observed in 2018. It's characterized by the periodic X-ray outbursts in contrast to its quiescent radiation. One of the proposed model for QPE events involves a secondary body orbiting around the central massive black hole, generating periodic flares as the mass of the secondary object accretes onto the BH. These systems ...
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2024.10.30
Constraints on the tensor-to-scalar ratio r via a likelihood-based, optimal lensing reconstruction
The cosmic microwave background (CMB) holds valuable information about the early Universe, including an imprint of its mass distribution that overshadows the faint signal from primordial gravitational waves, likely generated during inflation. Removing this imprint is crucial for future CMB observations to tightly constrain the tensor-to-scalar ratio r. This talk focuses on achieving the tightes...
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