A5006672943- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Gamma-ray bursts and supernovae
- Pulsars and Gravitational Waves Research
- Astrophysical Phenomena and Observations
- Astrophysics and Star Formation Studies
- Astrophysics and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Stellar, planetary, and galactic studies
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Black Holes and Theoretical Physics
- Geophysics and Gravity Measurements
- High-pressure geophysics and materials
- CCD and CMOS Imaging Sensors
- Astronomical Observations and Instrumentation
- Gold and Silver Nanoparticles Synthesis and Applications
- Quantum Dots Synthesis And Properties
- High voltage insulation and dielectric phenomena
- Superconducting and THz Device Technology
- Photochromic and Fluorescence Chemistry
- Domain Adaptation and Few-Shot Learning
- Biomedical Text Mining and Ontologies
- Anomaly Detection Techniques and Applications
- Vacuum and Plasma Arcs
National Astronomical Observatories
2020-2024
Institute of High Energy Physics
2011-2024
Chinese Academy of Sciences
2011-2024
University of Chinese Academy of Sciences
2017-2024
China University of Geosciences (Beijing)
2024
Guangxi University
2019-2024
BOE Technology Group (China)
2024
Chinese Academy of Science South America Center for Astronomy
2024
Yunnan Observatories
2018-2022
This investigation presents a novel approach for the nondestructive, and real-time analysis of crystalline structures, including transition metal dichalcogenides renowned their optoelectronic capabilities. The methodology employs synergistic blend infrared digital holography deep learning, utilizing an in-line system Transformer-based learning algorithms, to provide detail in material microstructure. article investigates effects different parameters on reproduction fidelity, with particular...
Abstract Four ultraluminous infrared galaxies (ULIRGs) observed with JWST/NIRcam in the Cosmos Evolution Early Release Science program offer an unbiased preview of z ∼ 2 ULIRG population. The objects were originally selected at 24 μ m and have strong polycyclic aromatic hydrocarbon emission features Spitzer/Infrared Spectrometer. four similar stellar masses ∼10 11 M ⊙ but otherwise are quite diverse. One is isolated disk galaxy, it has active nucleus as shown by X-ray observations a bright...
ABSTRACT We conduct a comprehensive analysis of the accreting X-ray pulsar, Hercules X-1, utilizing data from Imaging Polarimetry Explorer (IXPE) and Nuclear Spectroscopic Telescope Array. IXPE performed five observations Her consisting three in Main-on state two Short-on state. Our time-resolved uncovers linear correlations between flux polarization degree as well pulse fraction degree. Geometry parameters are rigorously constrained by fitting phase-resolved modulations Cyclotron Resonance...
Neutral hydrogen (HI) is the primary component of cool interstellar medium (ISM) and reservoir fuel for star formation. Owing to sensitivity existing radio telescopes, our understanding evolution ISM in galaxies remains limited, as it based on only a few hundred detected HI beyond local Universe. With high Five-hundred-meter Aperture Spherical Telescope (FAST), we carried out blind search, FAST Ultra-Deep Survey (FUDS), which extends redshifts up 0.42 50 $\rm \mu Jy \cdot beam^{-1}$. Here,...
In this paper, we report our investigation of pulsar scintillation phenomena by monitoring PSR B0355+54 at 2.25 GHz for three successive months using the Kunming 40-m radio telescope. We measured dynamic spectrum, two-dimensional correlation function and secondary spectrum. These observations have a high signal-to-noise ratio (S/N ≥ 100). detected arcs, which are rarely observable such small The sub-microsecond scale width arc indicates that transverse structures on scattering screen is as...
We present a sample of 330 blue edge-on low surface brightness galaxies (ELSBGs). To understand the chemical evolution LSBGs, we derived gas-phase abundance and [$\alpha$/Fe] ratio. Compared with star-forming galaxies, ELSBGs show flatter trend in mass-metallicity ($M_*-Z$) relation, suggesting that oxygen enhancement is inefficient. focus on 77 HI data found closed-box model can not explain their gas fraction metallicity implying infall and/or outflow needed. ratio normal ELSBG ($<$...
Abstract We present a 24 μ m-selected spectroscopic sample z > 0.13 (median 〈 〉 = 0.41) in the Lockman Hole field, consisting of 4035 spectra. Our aim is to identify active galactic nuclei (AGNs) and determine their fraction this mid-infrared-selected sample. In work, we use [Ne v ] λ 3426 emission line spectroscopically AGNs. Combined with broad-line Type I AGNs selected our previous study, consists 887 (∼22%) confirmed perform stacking analysis on remaining spectra find that various...
Abstract Quantum dots (QDs) have been paid much attention on the color conversion for light-emitting diode (LED) in micro-display recently. However, it is hard to achieve high efficiency a thin QD layer. In this paper, we fabricated silver nanoparticles (Ag NPs) with radii ranging mostly from 25 35 nm blue LED peak wavelength of 450 nm, then spin-coated QDs 565 nm. Scanning electron microscopy, cathodoluminescence, photoluminescence (PL), and time-resolved PL measurements were performed. The...
Abstract We present the integral field spectroscopic observations of ionized gas (H α and [N II ]) using PCWI, along with deep CO(2–1) by <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msup> <mml:mrow/> <mml:mrow> <mml:mo>‵</mml:mo> </mml:mrow> </mml:msup> <mml:mover accent="true"> <mml:mi mathvariant="normal">U</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> mathvariant="normal">u</mml:mi> </mml:math> receiver on JCMT for AGC 102004. The velocity H shows an...
In order to reduce the lightning trip-out rate of grid power lines, a kind impulse quenching based multichamber arc structure (IQBMAS) is developed by authors. This MAS can attract into its channel and truncate multiple parts rapidly. this case, will not develop steady frequency current, so be avoided. paper, simulations experiments are conducted verify arc-quenching effect IQBMAS on basis expounding operating principle IQBMAS, establishing model in as well deriving relevant numerical...
In this paper, we investigate the impact of correlated noise on fast radio burst (FRB) searching. We found that 1) significantly increases false alarm probability; 2) signal-to-noise ratios (S/N) positives become higher; 3) also affects pulse width distribution positives, and there will be more with wider width. use 55-hour observation for M82 galaxy carried out at Nanshan 26m telescope to demonstrate application modelling. The number candidates parameter can reproduced modelling noise....
We report on the characterization of modifications in fused silica after exposure to low fluence (2 J/cm2) 355 nm laser at repetition frequencies 1 Hz, 5 Hz and 10 Hz. Synchrotron based XRF spectroscopy is employed study concentration variation metal inclusions surface layer. Positron annihilation lifetime used probe atomic size defects bulk silica. FT-IR characterize changes bond length angle Si-O-Si covalent irradiated Compared basic frequency, big loss cerium iron concentration,...
Context. We report new H I observations of four z ∼ 0.05 VALES galaxies undertaken during the commissioning phase Five-hundred-meter Aperture Spherical Radio Telescope (FAST). Aims. FAST is largest single-dish telescope in world, with a 500 m aperture and 19-Beam receiver. Exploiting unprecedented sensitivity provided by FAST, we aim to study atomic gas content, via 21 cm emission line, low- star formation taken from Valparaíso ALMA/APEX Line Emission Survey (VALES). Together previous...
We identify a sample of spectroscopically measured emission line galaxy (ELG) pairs up to z=1.6 from the WFC3 Infrared Spectroscopic Parallels (WISP) survey. WISP obtained slitless, near-infrared grism spectroscopy along with direct imaging in J and H bands by observing pure-parallel mode Wide Field Camera Three (WFC3) on Hubble Space Telescope (HST). From our search 419 fields covering an area ~0.5 deg$^{2}$, we find 413 ELG pair systems, mostly Halpha emitters. then derive reliable star...
We present a 24 um-selected spectroscopic sample z > 0.13 (median = 0.41) in the Lockman Hole field, consisting of 4035 spectra. Our aim is to identify AGNs and determine their fraction this mid-infrared selected sample. In work, we use [Ne V]3426 emission line spectroscopically AGNs. Combined with broad-line Type I our previous study, consists 887 (22%) confirmed perform stacking analysis on remaining spectra, find that various MIR-wedge-selected AGN candidates, stacked spectra still show...
Abstract Active galactic nucleus (AGN) driven outflows can have a significant impact on the evolution of host galaxy. In this work, we compare properties galaxies that AGNs with and without outflows. Our sample consists 103 identified by mid-IR color–color selection confirmed optical spectroscopy at redshift range 0.3 ≲ z 0.9. We fit [O iii ] λ 5007 line using spectra from zCOSMOS survey to identify study occurrence find ionized are present in ∼25% our sample, largest incidence highest X-ray...
We present the integral field spectroscopic observations of ionized gas (H$\alpha$ and [{\ion{N}{II}}]) using PCWI, along with deep CO(2-1) by $^\backprime\bar{\rm U}^\backprime\bar{\rm u}$ receiver on JCMT for AGC 102004. The velocity H$\alpha$ shows an anomalous distribution in North-Western (NW) disk. spectrum is well-fitted two Gaussian components, weak component dominated NW fit center emission offset +24.2 km s$^{-1}$ from systemic obtained HI emission. derive gas-phase metallicity,...
Causal Temporal Representation Learning (Ctrl) methods aim to identify the temporal causal dynamics of complex nonstationary sequences. Despite success existing Ctrl methods, they require either directly observing domain variables or assuming a Markov prior on them. Such requirements limit application these in real-world scenarios when we do not have such knowledge variables. To address this problem, work adopts sparse transition assumption, aligned with intuitive human understanding, and...
Prevalent in biological applications (e.g., human phenotype measurements), multimodal datasets can provide valuable insights into the underlying mechanisms. However, current machine learning models designed to analyze such still lack interpretability and theoretical guarantees, which are essential applications. Recent advances causal representation have shown promise uncovering interpretable latent variables with formal certificates. Unfortunately, existing works for distributions either...
We analyzed the properties of a sample edge-on low-surface brightness galaxies, which are referred to as Cao23 ELSBGs. ELSBGs exhibit wide range luminosities (−22 < Mr −13) with mean scale length 3.19 ± 1.48 kpc. Compared HI-rich dwarf ELSBGs, display more extended disk structures and redder (g-r) colors. They also, on average, massive than Star formation rates (SFRs) were calculated using WISE 12 μm luminosity conversions spectral energy distribution (SED) fitting methods, respectively....
How does the low surface brightness galaxies (LSBGs) form stars and assemble stellar mass is one of most important questions to understand LSBG population. We select a sample 381 HI bright LSBGs with both Far Ultraviolet (FUV) Near Infrared (NIR) observation investigate star formation rate (SFR) scales, growth mode. measure UV NIR radius our sample, which represent star-forming distribution scales. also compare H band radius-stellar relation archive data, identify SFR structure difference...