报告讲座
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格致物理 第108期：尘埃与恒星的共同演化：从创生之柱到超级空腔
本报告基于多波段观测，系统地阐述了星际尘埃在星系演化中的关键作用及其与恒星形成的双向互动关系。主要研究发现包括：局部尺度：JWST对鹰状星云的高分辨率观测揭示了辐射反馈触发恒星形成的证据，并发现极端环境下的尘埃消光定律偏离标准模型。
发布者： 发布时间：2026-01-13 14:57:23 -
格物致理107期：Revealing the Origin of Galactic Cosmic Rays: PeVatrons in the Milky Way
For decades, physicists and astronomers have grappled with a fundamental cosmic mystery: the origin of cosmic rays, particularly around the so-called knee of the energy spectrum at E ≳ 1 PeV (10¹⁵eV). While the Galactic origin of this spectral feature - identified as early as the 1950s - is widely accepted, pinpointing the astrophysical objects capable of accelerating particles to such extreme energies has remained a significant challenge.
发布者： 发布时间：2026-01-01 11:09:57 -
格物致理106期：Gamma-Rays and Gravitational Waves from Millisecond Pulsars: Magnetospheric Physics and the Galactic Center Excess
Millisecond pulsars (MSPs) sit at the crossroads of extreme magnetospheric physics and a long-standing Galactic Center mystery: the GeV Excess (GCE), for which MSPs remain the leading astrophysical explanation.
发布者： 发布时间：2025-12-22 09:52:17 -
格物致理讲坛 第105期：Diffuse interstellar bands in Gaia RVS spectra
Diffuse interstellar bands (DIBs) comprise more than 600 broad absorption features observed between 0.4 and 2.4 microns, widely thought to originate from electronic transitions in complex molecules such as polycyclic aromatic hydrocarbons (PAHs) and fullerenes. As such, DIBs serve as powerful diagnostics for exploring the lifecycle and properties of complex organic material in diverse interstellar environments. The Gaia Radial Velocity Spectrometer (RVS) records two prominent DIBs at 862.1 nm (strong) and 864.8 nm (broad). In this talk, I will present our measurements of these two features in Gaia RVS spectra, along with the released products in Gaia DR3 and FPR. I will further discuss an analysis of the carrier properties of the 862.1 nm DIB, including its spatial distribution, kinematics, and evidence for its cationic nature as revealed by its environmental behavior relative to interstellar dust.
发布者： 发布时间：2025-12-05 11:55:56 -
格物致理讲坛 第104期：LHC和未来高能对撞机：探索中性三规范玻色子耦合的新物理
中性三规范玻色子耦合(nTGC)只能由满足完整电弱对称性的标准模型有效理论(SMEFT)8维以上的算符产生。因此nTGC提供了一个探测超标准模型新物理的独特窗口。我们研究了对nTGC有贡献的纯规范玻色子算符和含Higgs的算符。我们推导了由8维算符产生的中性三规范玻色子顶点(nTGV)并将其与新的形状因子表示对应。通过这对应关系，我们推导出真正自洽的nTGV的形状因子表示并去掉了非物理的高能量依赖项。我们先后研究了高能电子对撞机中e+e−→Zγ，LHC和100TeV pp对撞机中pp(qq)→Zγ过程对CP守恒和CP破缺的nTGC的探测灵敏度并与目前LHC的探测结果进行比较。我们发现在对撞能量不超过1TeV的CEPC, FCC-ee和ILC中对新物理尺度的探测能到(1−5) TeV的范围，LHC能达到的探测灵敏度与它们相当。对于对撞能量在(3−5) TeV的CLIC 可以对新物理尺度探测到(10−16)TeV，而100TeV pp对撞机具备对nTGC更高的探测灵敏度。ATLAS和CMS已经采取我们的方案对LHC Run 2的数据进行分析。我们按现在CEPC的设计参数对nTGC的测量做了探测器模拟分析。
发布者： 发布时间：2025-11-09 12:08:11 -
格物致理讲坛 第102期：太阳磁活动周的时空演化规律
太阳磁活动周的时空演化规律
发布者： 发布时间：2025-11-03 10:14:20