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2025.12.15
Connecting the Dots: From Electrons to Planets
Most exoplanets likely begin life wrapped in hydrogen–helium envelopes that interact intensely with their molten or supercritical interiors for millions to billions of years. Yet, despite their pivotal role in shaping planetary formation, evolution, and atmospheric composition, our fundamental physical and chemical understanding of these interactions remains limited, in large part because they...
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2025.12.08
Particle acceleration and emission in jets of microquasars and active galactic nuclei
The origin of cosmic rays (CRs) remains an open question. The CR spectrum is characterized by two significant breaks: the knee at ~3 PeV (PeV=1e15 eV) and the ankle at ~3 EeV (EeV=1e18 eV). It is widely accepted that ultra-high-energy cosmic rays (UHECRs) above the ankle originate from extragalactic sources, with the transition energy between galactic and extragalactic components lying between ...
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2025.12.03
The use of the quasar dataset on Cosmology: consequences and prospects
We try to find an optimized methodology to constrain the cosmological parameters using the quasar dataset. Quasars can be the potential cosmic probe that can fill up the gap between the farthest observed Type Ia Supernovae and the Cosmic Microwave Background CMB. Quasars can be observed to the highest redshift of z ≈ 7.1. It can give valuable insight into the tensions of the cosmological param...
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2025.12.08
Tracing Cosmic Evolution: From the CMB to the Web, the CGM, and Galactic Disks
This is the abstract: Understanding how galaxies form and evolve remains one of the central challenges in modern astrophysics. In this talk, I will present my research over the past decade on the multi-scale processes that govern galaxy formation, from the initial conditions imprinted in the cosmic microwave background to the assembly of galactic disks.I will show that the effect of the cosmic ...
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2025.12.03
Hunting for strong gravitational lenses with Euclid
Euclid is a class-M space mission by ESA launched in July 2023. In the course of its six years lifetime, it will observ ~14,000 sq. degrees of the extragalactic sky with the aim of understanding the nature of dark matter and dark energy combining multiple cosmological probes such as weak lensing and galaxy clusters. Being designed for accurate shape measurements from space and having a space re...
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2025.12.23
A new multiprobe analysis of modified gravity and evolving dark energy
Dark energy has attracted renewed attention since DESI reported a possible dynamical behavior crossing the cosmological constant boundary, favoring the (w0,wa) parametrization over a cosmological constant at more than 3\sigma. This apparent evolution is a manifestation of some discrepancies between DESI BAO, Planck CMB and supernovae measurements. An independent probe from DESI and SN is theref...
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2025.11.27
OJ 287: The Rosetta Stone of Supermassive Black-Hole Binaries
Recent observational campaigns and theoretical investigations strongly indicate the presence ofa spinning supermassive black hole binary that spirals in due to the emission ofnano-Hertz gravitational waves in bright blazar OJ 287.I will briefly describe these efforts while focusingon our August 2019 observations and their implications.Additionally, I will touch upon our ongoing efforts, relev...
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2025.11.07
New Insights into the Progenitors of Core-Collapse Supernovae
Core-collapse supernovae (CCSNe) are spectacular explosions of dying massive stars and play significant roles in various astrophysical processes. It is a key topic, and still a major difficulty, to determine the progenitors of different types of CCSNe. In this talk, I will describe the general understanding on this topic from past studies and introduce our recent work in this field on a wide ra...
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2025.10.23
稀释制冷机及其关键技术研究进展
稀释制冷机是一种能够连续产生10 mK极低温度的制冷系统，广泛应用于凝聚态物理、天文探测和量子计算等领域。本报告将介绍团队在全国产化10 mK脉冲管预冷稀释制冷机的最新进展。首先将介绍全国产化的4 K脉冲管制冷机，其制冷功率为1.4 W @4.2 K，40 W @45 K，最低温度可降至2.15 K，非常适合用于液化3He，并介绍其在1K制冷机中的应用。其次将介绍团队研发的新型同轴对流热开关、以及新型气隙热开关，最大开关比可达1000。最后针...
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2025.10.17
Galactic magnetized halo related to the eROSITA Bubbles
The large-scale structures such as Fermi Bubbles and eROSITA Bubbles provide a unique opportunity to study our Milky Way. However, the nature and origin of these large structures are still under debate. In this talk, I will present the identification of several kpc-scale magnetized structures based on their polarized radio emission and their gamma-ray counterparts, which can be interpreted as t...
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