Research
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2024.08.12
Cosmic evolution of the physical conditions for star and star cluster formation
Recent observations from ALMA and JWST have revealed the complex and turbulent nature of galaxies at high redshift, during the epoch of formation of globular clusters. The emergence of large disks at cosmic dawn (z > 10) and the almost ubiquity of massive star forming clumps at cosmic noon (z~2) question the formation scenarios of globular clusters. Although gravitational lensing pushes the obs...
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2024.08.12
Current and future characterization of small exoplanet atmospheres from ground and space
Planets between the size of Earth and Neptune, also known as sub-Neptunes, pose a conundrum. They are absent in the solar system, but more than half of all Sun-like stars in the Galaxy host a sub-Neptune interior to 1 au. Although the number of sub-Neptunes atmospheres probed so far has been very low, a major breakthrough in exo-atmospheres science is happening right now thanks to the increased...
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2024.08.12
Stellar physics and population in the open cluster lab (Language: English)
Open clusters provide an ideal laboratory for testing and calibrating our understanding of stellar physics and single stellar population. In this talk, I will discuss how astronomers use open clusters as a well-defined single population of stars to study the Milky Way disk and stellar evolution. Additionally, I will explore how open clusters can be used to validate pipeline results from large p...
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2024.08.12
Hypervelocity stars: energetic guys “kissed” by massive black holes
The so-called Hypervelocity stars (HVSs; with velocities even greater than 1000 km/s) were first predicted from the theoretical arguments of Hills (1988), and attributed to be the result of tidal interaction between a close stellar binary system and a supermassive black hole (SMBH) in the Galactic center, commonly referred to as the “Hills mechanism”. HVSs or High-Velocity stars (HiVels) can ...
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2024.08.12
Quest for the origin of neutrinos
The discovery of neutrino oscillation established a non-zero mass of neutrino. The origin of neutrino and its non-zero mass is an one of the most important experimental clues to the new physics beyond the standard model. Neutrinos are ubiquitous in the universe, accompanying most of the weak-interacting physics processes. I shall review natural and artificial sources of neutrinos with an emph...
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