By impacting a granular bed by steel balls and liquid drops, previous researchers focused mainly on the morphology of impact craters. [1-2] To
mimic the heated exterior of a meteorite, we adopt the melted tin. A high-speed camera allows us to follow step by step the fiery interaction between melted
tin and sand, as manifested in PIV and CNN, and monitor their deformation. Kinetic energy,...
Globular clusters (GC) are the oldest known astronomical objects in the universe. Discovered about two hundred years ago, the initial conditions that give rise to GCs are still mysterious. Significant progress has been made in the last decade: a clear correlation has been found between the total number (or mass) of GCs in a galaxy and the mass of its host dark matter halo, which provides an...
Since 2011 the low energy continuum model of twisted bilayer graphene(TBG) has been solved, the researches about TBG has never decayed.
In 2012,the tight binding model of TBG was proposed, short after, more and more van der Waals hetero-structure were gradually synthesized from experiments,and the theory also predicted many possible new materials and structures, including derivatives of...
Fast radio bursts (FRBs) are millisecond-duration transients with large dispersion measures. The origin of FRBs is still mysterious. One of the methods to comprehend FRB origin is to probe the physical environments of FRB host galaxies. Mapping molecular-gas kinematics in FRB host galaxies is critical because it results in star formation that is likely connected to the birth of FRB...
When dense cores in molecule clouds collapse and form protostars, they may fragment into some smaller structures and develop multiple systems. However, the key mechanisms that control fragmentation remain unclear observationally. In this project, we try to answer this question by analyzing the physical conditions(i.e.: density, turbulence, magnetic field, Jeans instability) of dense cores in...
Inspired by the diffusive reflection for natural imaging, we proposed Sparse Edge Encoder(SEE) to represent the correlation between local nearing pixels for the natural images, the corresponding image charges representation points out the singularities that violate the fundamental assumption, provides the pixel hierarchy within a natural image. The experiments show that great...
We present the experimental observation of macroscopic excited motional states in Bose-Einstein condensates. The interference of the states exhibits a non-smooth density distribution. Unlike the conventional collective oscillation modes, the perturbative approach is not applicable for its dynamics. In our protocol of the trap frequency jumping, the condensate is self excited by lowering the...
Quantum key distribution (QKD) aims to provide an information theoretically secure way to distribute secret keys. However, practical devices may not follow the theoretical assumptions, which leaves a backdoor for eavesdropper to exploit. Single photon detectors are considered to be the most vulnerable part in QKD systems. Measurement device independent (MDI) protocol provides a way to remove...
A T-dwarf Candidate from JWST Early Release NIRCam Data
We found an early T-dwarf, CEERS-BD1, with the effective temperature of Teff ∼1300K. An estimated distance of 4.92±0.32kpc shows it could possibly be located in the thick disk or galactic halo. Further spectroscopic observations such as JWST NIRSpec would be important to confirm the properties.
Source counts at 7.7 to 21 micron in CEERS field with JWST
Self-Assembly of Magnetic Atoms on Stanene
Polycyclic aromatic hydrocarbon (PAH) luminous galaxies in JWST CEERS data
Active galactic nuclei (AGNs) are one of the most intriguing and challenging phenomena in modern astronomy. The nature of the interaction between AGNs and their host galaxies remains an unsolved question. Therefore, conducting an AGN census is crucial to AGN research. However, many AGNs are obscured by their environment, which can block UV and optical observations due to the dusty torus...
Revisiting the Mysterious Origin of FRB 20121102A with Machine-learning Classification
Galaxy source counts at 7.7 μm, 10 μm and 15 μm with the James Webb Space Telescope
In-depth analysis of music structures as a self-organized network
Discovering missing information in Quantum theory via deep learning network
