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2023.06.01

Feeding and feedback of the supermassive blackhole in brightest cluster galaxies

<p>The intracluster medium (ICM) is the largest reservoir of the hot baryons. The centers of the ICM often feature a sharp X-ray surface brightness peak. AGN mechanical feedback from the brightest cluster galaxy is likely preventing the hot ICM from the catastrophic cooling, although the exact feedback process remains poorly understood. A growing number of kiloparsec-scale multiphase filaments hav...</p>

2023.05.25

A multi-band, multi-resolution view of hot Jupiter atmospheres

<p>With the rapidly increasing number of newly discovered exoplanets, the characterization of their atmospheres is becoming the new frontier, crucial for distinguishing between different planetary populations and bearing the imprints of planet formation and evolution. To this end, transit spectroscopy has been the most fruitful technique, revealing the atmospheric species for dozens of exoplanets,...</p>

2023.05.18

A Minimalistic View of How Galaxies Live, Breathe, and Die

<p>Despite the diversity in the histories of individual galaxies, most of them live slow and die fast. I will firstly introduce a systematic exploration of the galaxy-halo connection, aiming to search for deviations in the spatial distribution of galaxies from the simplest halo model prediction. &nbsp;The null detection paves the way for us to identify the key driver of galaxy quenching within the same...</p>

2023.05.11

Physical Mechanisms Regulating Gas Supply to Galaxies

<p>I will first present an overview of the problem of galaxy formation. I will then turn my attention to some important and robust physical mechanisms that regulate the supply of cold gas to galaxies. I will in the end try to convey the message that the field of galaxy formation simulation would benefit by turning to more physics, rather than parameter, based approach, through exploring additional...</p>

2023.04.27

Formation of hot Jupiters in star clusters

<p>It has been suggested that the occurrence rate of hot Jupiters (HJs) in&nbsp;some open clusters might reach several per cent, significantly higher&nbsp;than that of the field. Several models have been proposed to solve this&nbsp;problem but none has been satisfactory. In a binary-rich cluster, the&nbsp;von Zeipel-Lidov-Kozai (ZKL) mechanism may cause the observed high&nbsp;occurrence rate. For planets formed around a s...</p>

2023.04.20

The gas environment of galaxies across 10 billion years

<p>The evolution of galaxies is closely connected to the gas environment in which galaxies reside. Traditionally, this tenuous gas that cycles in and out of galaxies has been studied primarily in absorption using quasar spectroscopy. The deployment of large integral field spectrographs at 8 meter telescopes, and in particular MUSE at VLT, has transformed our view of the interplay between the ambie...</p>

2023.04.13

Coronal magnetic field Measurements

<p>Coronal magnetic fields are at the heart of most of the unsolved problems in solar physics and of the solar–terrestrial relationship. However, no routine measurements have been carried out for the magnetic field measurement in the solar corona, due to the weakness of its signature. In the past several decades, a number of techniques have been developed for coronal magnetic field diagnostics. I...</p>

2023.04.06

Solving the Mystery of Small Exoplanets through Holistic Characterization

<p>The first detection of another planet around a Sun-like star marked the beginning of a new era in which our understanding of how planets typically form and the uniqueness of our Solar System were radically upended. We now know that planet formation is incredibly resilient, and produces a diverse myriad of planets around a wide range of stellar types. These remarkable findings tell us that the S...</p>

2023.03.30

Not only astrophysics: fundamental physics studies with high energy missions

<p>There are no doubts that high energy astrophysics has opened new views on the Universe and on the many classes of sources that populates the hot and energetic sky. However, in the near future, spectral, timing, and polarimetric observations at high energies are expected to address key scientific questions in fundamental physics.In this seminar, I will first briefly summarise the potential of hi...</p>

2023.03.23

Active Galactic Nuclei: Monsters to Scale or Puzzles to Solve?

<p>Active Galactic Nuclei (AGNs) are the brightest sources of electromagnetic radiation in the&nbsp;universe, enabling us to observe them across the cosmos. AGNs are the central parts of galaxies.Most of their brightness results from the accretion of matter by a supermassive black hole&nbsp;(SMBH) at their center. Studying the AGNs informs us about the role of SMBHs in the&nbsp;formation and evolution of galaxie...</p>