Yi Zhong Gong
A5083622333- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Particle Detector Development and Performance
- Radiation Therapy and Dosimetry
- Pulsars and Gravitational Waves Research
- Solar and Space Plasma Dynamics
- Astrophysical Phenomena and Observations
- Particle physics theoretical and experimental studies
- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Atmospheric Ozone and Climate
- Cosmology and Gravitation Theories
- Fluid Dynamics and Heat Transfer
- Boron Compounds in Chemistry
- Neutrino Physics Research
- EEG and Brain-Computer Interfaces
- Advanced Combustion Engine Technologies
- Gamma-ray bursts and supernovae
- Intermetallics and Advanced Alloy Properties
- Neuroscience and Neural Engineering
- Radio Astronomy Observations and Technology
- Plant Surface Properties and Treatments
- Superconductivity in MgB2 and Alloys
- Brain Tumor Detection and Classification
- MXene and MAX Phase Materials
Ningbo University
2024
Wuhan University
2021-2024
Kavli Institute for the Physics and Mathematics of the Universe
2023
The University of Tokyo
2023
Beijing Normal University
2023
Tsinghua University
2020
Southwest Jiaotong University
2016-2019
Purple Mountain Observatory
2008
Abstract Peculiar velocity encodes rich information about the formation, dynamics, evolution, and merging history of binary black holes. In this work, we employ a hierarchical Bayesian model to infer peculiar distribution We use data from GWTC-3 assume Maxwell-Boltzmann for velocities, but do not consider dependence on masses hole binaries. The constraint parameter, v 0 , is weak uninformative. However, determination can be significantly improved with next-generation ground-based...
Massive black holes (MBHs) are crucial in shaping their host galaxies. How the MBH co-evolves with its galaxy is a pressing problem astrophysics and cosmology. The valuable information carried by binary encoded gravitational waves (GWs), which will be detectable space-borne GW detector LISA. In data analysis, usually only dominant (2,2) mode of signal considered parameter estimation for However, including higher harmonics can break degeneracy between parameters, especially inclination angle...
The DArk Matter Particle Explorer (DAMPE) is a satellite-borne experiment, in operation since 2015, aimed at studying cosmic rays and high-energy gamma rays. Proton helium are the first- second-most abundant components Given their smaller interaction cross sections with interstellar medium, compared to heavier nuclei, they can travel larger distances, thereby becoming important probes cosmic-ray sources as well acceleration propagation mechanisms. Recently, DAMPE collaboration, machine...
Abstract For non-spinning, charged (Reissner–Nordström) black holes, the particles with an opposite sign of charge respect to that hole will be pulled into by extra electromagnetic force. Such a quickly neutralized so there should not exist significantly charged, non-spinning holes in universe. The case spinning, (Kerr–Newmann, KN) is more complicated. given initial position and velocity particle, oppositely particle does always easily fall than neutral particle. possible existence...
The DArk Matter Particle Explorer (DAMPE) is a space-borne high-energy particle detector launched on 17 December 2015. It can observe the $\gamma$-ray sky from $\sim 2$ GeV to 10 TeV with acceptance at most $1800~\rm cm^2\,sr$. With over 7.5 years of continuous operation, DAMPE has surveyed whole for about 15 times and collected more than 300,000 candidate photon events. In last few years, understanding payload been improved instrumental response functions have calibrated on-board data....
Thanks to its large calorimeter, the DArk Matter Particle Explorer (DAMPE) satellite experiment is ideally suited for direct detection of cosmic rays (CRs) up knee. At these TeV PeV energies, main uncertainty on CR flux measurements comes from hadronic cross sections, which are largely experimentally unconstrained. We developed novel machine learning (ML) tools that able probe depth at CRs inelastically interact inside DAMPE experiment. Applying techniques 7 years data, and comparing results...
The DArk Matter Particle Explorer (DAMPE) is a high-energy cosmic ray and gamma-ray detector located in space. Over period of seven years since its launch on December 17, 2015, DAMPE has surveyed the entire sky collected an extensive dataset more than 300,000 photons with energies above 2 GeV. To analyze data obtained by DAMPE, instrument response functions (IRFs) have been derived, specialized software called DmpST developed. In this context, we present results point-like source catalog....
The DArk Matter Particle Explorer (DAMPE), a space-based high energy particle detector, has been operated on-orbit for more than five years. large geometric factor and good charge resolution enable DAMPE to have very potential measure cosmic-rays up 100 TeV. Knowledge of the boron carbon (B/C) flux ratio is important in understanding prop- agation cosmic rays, especially TeV range. In this contribution, latest progress B/C analysis based on flight data collected by during 5 years operation,...
Boron nuclei in cosmic rays (CRs) are believed to be mainly produced by the fragmentation of heavier nuclei, such as carbon and oxygen, via collisions with interstellar matter. Therefore, boron-to-carbon flux ratio (B/C) boron-to-oxygen (B/O) very essential probes CR propagation. With a large geometric factor good charge resolution, DArk Matter Particle Explorer (DAMPE), is expected extend measurement B/C B/O up few TeV/n energies. In this contribution, direct measurements energy range from...
DAMPE (DArk Matter Particle Explorer) is a space-based particle detector that has been continuously taking data since its successful launch in December 2015. Its primary scientific goals include the indirect search of dark matter, study galactic cosmic rays with energy from few tens GeV up to hundreds TeV and high-energy gamma-ray astronomy. Spectral measurements secondary nuclei such as lithium, beryllium boron ratios fluxes are fundamental improve our understanding ray acceleration...
The DArk Matter Particle Explorer (DAMPE), a space-based high-energy particle detector, has been operated in orbit for more than seven years. Thanks to its large geometric factor, good charge resolution and wide dynamic range energy measurements, DAMPE can provide valuable insights into the spectra of cosmic ray carbon oxygen up tens TeV/n. These measurements are fundamental better understanding origin, acceleration mechanism propagation rays Galaxy. In this paper, we present latest progress...
The DArk Matter Particle Explorer (DAMPE) space mission is designed to measure cosmic rays and gamma rays. key sub-detector of DAMPE the Bismuth Germanium Oxide (BGO) Electromagnetic CALorimeter (ECAL), which measures energies electrons/gamma-rays ranging from 5 GeV - 10 TeV. fluorescence quenching effect has been observed for hadronic shower in sensitive unit BGO ECAL, cases yield no longer proportional deposited energies. However, it still unclear whether there a ECAL ~TeV electromagnetic...
Forbush Decrease (FD) is a rapid decrease and slow recover in the observed galactic cosmic ray intensity, caused by active solar events sweeping low energy rays (GCRs) away from Earth. Differnet properties of FDs have been different scientific experiment but mostly worldwide ground based Neutron Monitors (NMS), they focus on secondary neutron atmosphere. The Dark Matter Particle Explorer (DAMPE) satellite-based cosmic-ray that has stably operated for more than 7 years. Precise measurements...
The DArk Matter Particle Explorer (DAMPE) is a pioneering calorimetric experiment that has been successfully operating in space since December 2015, designed to detect cosmic rays up unprecedentedly high energies thanks the fine-grained thick BGO calorimeter and relatively large geometric factor. Among scientific goals of DAMPE are precise measurements cosmic-ray electron plus positron spectrum, including detection possible indirect dark matter signatures, spectral primary secondary species,...
Binary black hole may form near a supermassive hole. The background (BH) will affect the gravitational wave (GW) generated by binary It is well known that Penrose process provide extra energy due to ergosphere. In present paper we investigate amplification of Kerr background. particular and different from earlier studies, compare energies waves in cases with without nearby BH. We find only when moving relative can GW be amplified. Otherwise, suppressed This finding consistent inequality...
Dark Matter Particle Explorer (DAMPE) is a calorimetric-type, satellite-borne detector for observations of high energy electrons, gamma-rays, and cosmic-ray nuclei. Using five years data collected with DAMPE from January 1, 2016 to December 31, 2020, we analyzed the spectrum iron. Detailed studies fragmentation iron in have been performed using Monte Carlo simulations.
DArk Matter Particle Explorer (DAMPE), a space-borne high energy cosmic ray and gamma-ray detector, has surveyed the whole sky for five years collected more than 220,000 photons above 2 GeV since launching on Dec. 17, 2015. The instrument response functions (IRFs) are derived dedicated software named DmpST is developed data analysis of DAMPE. Here we present method DAMPE bright sources search spectral analyses these sources.
The DArk Matter Particle Explorer (DAMPE) is a satellite-borne particle detector launched on December 17th, 2015, with different scientific objectives, looking for signatures of Dark decay or annihilation, performing gamma-ray astronomy and providing precise measurements galactic Cosmic Ray (CR) energy spectra. Accurate hadronic interaction cross sections, playing key role in the determination CR fluxes. survival probabilities have been implemented to study sections BGO calorimeter target...
The existence of fractionally charged particles (FCP) is foreseen in extensions or beyond the Standard Model particle physics. Most previously conducted searches for FCPs cosmic rays were based on experiments underground at high altitudes. However, there have been few carried out orbit other than AMS-01 flown by a space shuttle and BESS balloon top atmosphere. In this study, we conduct an FCP search on-orbit data obtained using Dark Matter Particle Explorer (DAMPE) satellite over period five...
DAMPE space-borne cosmic ray experiment has been collecting data since December 2015. Many high-impact results on the ion, electron and photon fluxes were obtained. This submission presents carbon flux analysis with using machine learning techniques. The readout electronics would saturate at energy deposits above several TeV in a single BGO bar of calorimeter. total loss per event due to saturation can sometimes reach over hundred TeV. We present convolutional neural network model which...
It is currently well established that proton and helium constitute the main component of cosmic radiation in energy range from tens GeV to hundreds TeV. Their direct detection separation have been carried out past years using several space-based instruments long-flying balloons, while ground-based experiments provided results at high energies but with large systematics due limited mass resolution. Surprisingly, two structures were found measurements individual spectra which deviates single...
The Dark Matter Particle Explorer (DAMPE) is a space-based Cosmic Ray (CR) observatory with the aim, among others, to study Electrons (CREs) up 10 TeV. Due low CRE rate at multi-TeV range, we aim increasing acceptance by selecting events outside fiducial volume. complex topology of non-fiducial require special treatment sophisticated analysis tools. Therefore, propose Convolutional Neural Network (CNN) identify CREs and reject background events, based on their interaction in DAMPE's...