首页

2024.01.11

Witnessing the Birth of Planets: The Structure and Chemistry of Planet-Forming Disks

<p>To date, there are more than 5000 exoplanets discovered in our neighborhood, showcasing a remarkable diversity in planetary system architectures. Unraveling the planet formation process, as well as the origin of this diversity, requires a comprehensive understanding of their birth sites - the dusty and gas-rich disks orbiting around young stars. ALMA’s unprecedented spatial resolution and sens...</p>

2023.12.29

The lively radio transient sky

<p>Making use of exponential increases in computing power, radio astronomers have been able to search larger areas of the sky at high time and frequency resolution. These surveys facilitate the studies of radio transients, particularly contributing to the thriving investigation of fast radio bursts (FRBs), enigmatic radio bursts observable at cosmological distances. I will provide an overview of t...</p>

2023.10.26

Exploring the early Milky Way with metal-poor stars

<p>Old low-metallicity (“metal-poor”) stars provide us a unique window to explore the early evolution and formation of our Milky Way as well as the early nucleosynthesis in the universe. In this talk, I would like to introduce the art of Galactic archaeology with metal-poor stars, mainly using the joint efforts between LAMOST and Subaru in the past few years as an example. A homogeneous high-pre...</p>

2023.12.21

Probing Planet Formation with the Most Extreme Cases

<p>Thousands of exoplanets have been discovered in the past ~30 years. However, there are still major gaps of knowledge in our understanding of planet formation. The most extreme exoplanets are often ideal for identifying, isolating, and investigating critical aspects of plant formation. In this talk, I will highlight three extremes of planet formation: 1) the ultra-short-period planets (&lt;1 day, &lt;...</p>

2023.12.14

Studying Particle Transport in the Magnetic Turbulence with Pulsar Wind Nebulae/Pulsar Halos with Multiwavelength Observations

<p>Pulsar wind nebulae and pulsar halos are extended sources of nonthermal radiation powered by pulsars. Morphologies of these sources reflect the spatial distribution of electrons/positrons therein, which is related to the particle transport mechanism and the turbulent nature of the background medium. Therefore, multiwavelength observations of pulsar wind nebula and pulsar halos provide a good op...</p>

2023.12.07

On the Cosmic Baryon Cycle---Insights Learned from the Cosmic Ultraviolet Baryon Survey (CUBS)

<p>The circumgalactic medium (CGM) contains the fuel for future star formation and the record of past feedback, making it uniquely sensitive to the physics of baryonic flows. Characterizing the tenuous multiphase CGM across cosmic time holds a key to unveiling the drivers of galaxy growth. The Cosmic Ultraviolet Baryon Survey (CUBS) is designed to map intergalactic and circumgalactic gas at interm...</p>

2023.11.30

Exploring the blinking universe with FAST

<p>Fast radio bursts (FRBs) are the brightest millisecond-duration-astronomical transients in radio bands with yet unknown origin. I will briefly review the development process of the field of fast radio bursts and introduce how we use FAST to study fast radio bursts. We reveal systematic frequency evolution of repeating FRBs, namely depolarization toward lower frequencies, which can be well descr...</p>

2023.11.23

Astrochemistry: from the interstellar medium to the cradle of life

<p>Who are we? Where do we come from?With the enhanced capabilities of modern radio and infrared telescopes, astrochemistry has experienced a remarkable surge in detecting molecules within the Interstellar Medium (ISM). Some of these identified species hold prebiotic significance. The origins, activation, and storage of these molecules within the ISM remain a mystery. How, when, and where these co...</p>

2023.11.16

Probing cosmic dawn from the ground to the lunar orbit

<p>Various 21 cm signals from neutral hydrogen have been proposed to probe the cosmic dawn, including the global 21 cm spectrum, the 21 cm tomography, and the 21 cm forest. They will provide valuable insights into the early structure formation during the cosmic dawn, and have been identified as the key scientific goals for a number of ground-based and space-borne radio experiments, including the i...</p>

2023.11.09

Like a wrecking ball: understanding giant planets as the key to finding Earths

<p>Jupiter-like planets are the key to understanding Earth-like planets. Their presence can disrupt the orbits of inner habitable worlds, or deliver life-sustaining water. While the search for Earth-like planets orbiting nearby stars garners the most attention, it is critically important to understand the presence and properties of giant planets in those systems. In the next decade, three space mi...</p>