首页

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>

2023.05.10

cosmological tests on fundamental physics

<p>The precision measurements from current observational cosmology have established the Lambda-Cold-Dark-Matter (LCDM) model as the standard cosmological model. However, the LCDM model as a pure phenomenological model with six base parameters still calls for a theoretical understanding of underlying mechanisms for the early and late accelerations as well as the nature of dark matter. In this talk,...</p>

2023.05.24

Toward Accurate Metallicity Measurements in ISM and Distribution of HI in CGM from 3D Spectroscopy

<p>Galaxies in the universe are intricately connected to the gas in and around galaxies. Accurately measuring the statistical properties of this gas is crucial for testing modern theories of galaxy formation and evolution. In this talk, I will present our recent efforts to characterize interstellar and circumgalactic media using integral field spectroscopy with high sensitivity in two aspects. 1) ...</p>

2023.04.21

Turbulence in outer protoplanetary disks

<p>Turbulence is essential to many fundamental processes in protoplanetary disks, including angular momentum transport, dust evolution, and planet migration. I will focus on two instabilities that can drive turbulent motions in outer disks. In the first part of this talk, a series of global 3D non-ideal MHD simulations via Athena++ code will be presented. The outer disk is found to be weakly MRI t...</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>

2023.03.31

Supercritical growth of seed BHs at cosmic dawn and co-evolution with host galaxies: a perspective regarding outflows

<p>Supercritical growth of massive/stellar mass seed BHs at high-z universe is believed to be one of the possible solutions to grow the observed supermassive black holes (SMBHs) at z~6. We study the long-term evolution of the global structure of axisymmetric accretion flows onto a black hole (BH) at rates substantially higher than the Eddington value, performing two-dimensional radiation hydrodyna...</p>