科学研究
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2025.03.27
X-ray polarization study of supernova remnants [EN]
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....
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2025.03.21
Revealing the nature of IRAC Optical Dropouts in the Deep HSC fields [EN]
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>5 in the 3-5 micron (IRAC ch1 and ch2) but are either very red with Y-ch1>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...
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2025.03.20
双星理论与观测
Host: Hui L
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2025.03.14
Expect the unexpected – Augmented astrophysical models for black hole population studies
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...
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2025.03.13
Binary around a BIG black hole v.s. Star around a BIG binary [EN]
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...
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