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2025.04.10

拉索发现黑洞是PeV宇宙线加速器

<p>拉索在银河系内发现了许多“拍电子伏加速器(PaVetron)”，其中的一部分以第一个黑洞PaVetron源表的形式发表，清楚显示出一个新的宇宙线源的“类”。最引人瞩目的是存在一个“超级-PaVetron”。还发现了一个近乎完美的黑洞+喷流的系统，让人类能够细致的研究黑洞吸积盘、喷流的产生等基本的物理问题。更重要的是我们发现，大约10个左右的源，将足以提供宇宙线“膝”及其以上的宇宙线的流量。拉索刚刚发表了质子在膝附近的能谱，...</p>

2025.04.03

Exploring the dark sector with gravitational lensing and wide field surveys in imaging and spectroscopy [EN]

<p>Since the discovery of the accelerated expansion of the universe in the 2000, dark matter and dark energy have been the main drivers of research in observational cosmology. At the same time, gravitational lensing, boosted by the Hubble Space Telescope observations, has become a key probe of the dark sector. In this talk, I will review this topic and focus on my research in Euclid and in DESI. I...</p>

2025.03.27

X-ray polarization study of supernova remnants [EN]

<p>The Imaging X-ray Polarimetry Explorer (IXPE) opens a new window to map magnetic fields in regions of freshly accelerated high-energy particles. By capturing the first spatially resolved X-ray polarization images of supernova remnants—including Cassiopeia A, Tycho, SN 1006, Vela Jr., RX J1713.7−3946, and RCW 86—IXPE probes the turbulent magnetic fields shaped by the Galaxy’s fastest shocks....</p>

2025.03.28

Design, Testing, and Commissioning of the Sun Yat-sen University 80 cm Infrared Telescope [EN]

<p>The Sun Yat-sen University (SYSU) 80cm infrared telescope is designed for near-infrared time-domain observations. It’s primary scientific objectives include follow-up of transients such as supernovae, gamma-ray burst afterglows, tidal disruption events, and monitoring of brown dwarfs, AGNs and variable stars. The telescope has an 80cm diameter with f/8, and is capable of observing in J and K b...</p>

2025.03.20

双星理论与观测

<p>Host: Hui L</p>

2025.03.21

Revealing the nature of IRAC Optical Dropouts in the Deep HSC fields [EN]

<p>Using the data from the Spitzer Space Telescope in the Deep HSC fields, we have found a mysterious population of objects that are detected at SNR&gt;5 in the 3-5 micron (IRAC ch1 and ch2) but are either very red with Y-ch1&gt;3.5 or totally invisible in the much deeper optical. Their median magnitudes are 23.95 and 23.68 AB in ch1 and ch2, respectively; 6% of the objects are also detected in IRAC ch3...</p>

2025.03.13

Binary around a BIG black hole v.s. Star around a BIG binary [EN]

<p>The detections of gravitational waves (GWs) from merging binary black holes (BHs) have motivated extensive research on the dynamical formation of such compact black hole binaries (BHBs). Recent studies have highlighted the potential role of tertiary-induced mergers via von Zeipel-Lidov-Kozai (ZLK) oscillations in generating the BHBs detected by collaborations like LIGO/VIRGO/KAGRA. I will discu...</p>

2025.03.14

Expect the unexpected – Augmented astrophysical models for black hole population studies

<p>GW observations are now revealing the population of black holes via the detection of binary black hole mergers, and the numbers are set to grow rapidly in the coming years: the distribution of astrophysical properties of binary black holes provides a key to interpret their formation channels. In this regard, scientists have proposed a variety of models for the black hole distribution, broadly c...</p>

2025.03.06

The progress of the SVOM Mission [EN]

<p>SVOM (Space-based multiband Variable Object Monitor) is a Chinese-French space mission mainly designed to study Gamma-Ray Bursts. The satellite has four instruments to detect and localize the prompt GRB emission and measure the evolution of the afterglow in the visible band and in soft X-rays, and a VHF communication system enabling the fast transmission of SVOM alerts to the ground. The ground...</p>

2025.03.07

Turbulent HI Gas Driven by the SN Bubbles [EN]

<p>The interstellar medium (ISM) is turbulent, and the energy sources driving this turbulence, particularly in HI gas, remain uncertain. Recently, stellar feedback, especially from supernovae (SNe), has been proposed as a potential mechanism for energy injection into the ISM. However, the specific processes involved are still unclear and require observational evidence. Using deep HI datacubes from...</p>