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2025.06.05

Ultra-hot Jupiter's atmosphere unveiled by high-resolution spectroscopy

<p>Ultra-hot Jupiter is a class of giant exoplanets with extremely high temperatures. Due to their unique chemical and physical properties, this class of exoplanet have become a popular research subject in recent years. In this talk, I will present observed results of ultra-hot Jupiters using both transmission and emission spectroscopy. We conducted a survey of a dozen ultra-hot Jupiters using gro...</p>

2025.05.29

Exploring Compact Object Binaries via Optical Observations and Surveys

<p>Compact objects, including white dwarfs, neutron stars, and black holes, serve as exceptional laboratories for probing fundamental physical processes under extreme conditions in the universe. Binary systems hosting these compact objects represent a crucial pathway for characterizing their properties and advancing our understanding of accretion physics and stellar evolution. While compact object...</p>

2025.05.22

The Restless (the birth of the periodic table)

<p>Following the Big Bang the Universe was homogeneous in matter, energy and barren of chemistry. It is the stars which, through their life and death, built up the periodic table. Astronomers have now identified several classes of cosmic explosions of which supernovae constitute the largest group. The Palomar Transient Factory was an innovative 2-telescope, and its successor, the Zwicky Transient ...</p>

2025.05.15

A Possible Metal-dominated Atmosphere below the Thick Aerosols of GJ 1214 b Suggested by Its JWST Panchromatic Transmission Spectrum

<p>GJ1214b is the archetype low-density sub-Neptune orbiting around a M-dwarf. The bulk composition of GJ1214b is of great interest to explore its origin; however, previous studies suffered from a degeneracy between a rocky core with a hydrogen-rich envelope or an icy core with a water-rich envelope. To break the degeneracy, atmospheric observations had been conducted for over a decade; however, t...</p>

2025.05.08

New Insights into Exoplanets: Connecting Theory with Measurements from Space and Lab

<p>The discovery of thousands of exoplanets in our galaxy has unveiled an extraordinary diversity in planetary compositions and properties, challenging conventional theories of planet formation and evolution. These observations have spurred the development of new theoretical models that incorporate additional physical processes to bridge the gap between theory and data. Informed by recent high-pre...</p>

2025.05.07

Metallicity Correlations in Galaxies

<p>Integrated field unit (IFU) spectroscopy provides a unique window to explore gas-phase oxygen abundances in the interstellar medium (ISM) of galaxies in the local Universe. Two-point correlations are one of the next-generation methodologies proposed to extract new information on ISM diffusion from metal fields inside galaxies. I will present two-point correlation analyses using CALIFA and MUSE ...</p>

2025.04.28

eROSITA Survey of the Hot Gaseous Halo of the Member Galaxies in Virgo

<p>The X-ray-emitting hot gas is one of the primary components of the X-ray emission in normal galaxies and is crucial for understanding the evolution of the galactic ecosystem. The Virgo Cluster is the nearest and a rich galaxy cluster at its early evolutionary stage, which offers a great opportunity to study the hot gas content of its member galaxies and the cluster environmental effects. In thi...</p>

2025.04.24

Active galactic nuclei and mergers in IR-bright galaxies

<p>The interaction of galaxies is known to regulate the star-formation activities in the merging systems, or galaxy pairs, however, whether and how such interactions affect the central supermassive black hole, often manifested as active galactic nuclei---AGNs, is still under debate. Controversies exist as to whether AGN activities are enhanced or suppressed during the different merging phases. The...</p>

2025.04.22

Shedding light on the particle nature of dark matter

<p>Several astrophysical and cosmological phenomena are consistent with the existence of a non-luminous, non-interacting “Dark Matter.” In this talk I describe efforts to detect Cold Dark Matter with particle experiments and the current limits. I then give an overview of the astrophysical constraints on Warm, Self-Interacting, and Fuzzy Dark Matter and a future outlook on Dark Matter searches.BI...</p>

2025.04.21

Clustering analysis on 4MOST Cosmology Redshift survey

<p>This presentation is divided into three main parts:Overview of Large-Scale Structure (LSS) Studies in CosmologyThis section introduces the theoretical framework behind the formation and evolution of large-scale structure, observations on LSS, statistical techniques used for LSS data analysis, and key phenomena (BAO, RSD and AP effect) associated with LSS.Introduction to 4MOST and the Cosmologic...</p>