A5100337512- Astrophysics and Star Formation Studies
- Force Microscopy Techniques and Applications
- Stellar, planetary, and galactic studies
- Spectroscopy and Laser Applications
- Atmospheric Ozone and Climate
- Mechanical and Optical Resonators
- Molecular Spectroscopy and Structure
- Astrophysical Phenomena and Observations
- Galaxies: Formation, Evolution, Phenomena
- Molecular Junctions and Nanostructures
- Solar and Space Plasma Dynamics
- Astrophysics and Cosmic Phenomena
- Astro and Planetary Science
- Ionosphere and magnetosphere dynamics
- Surface and Thin Film Phenomena
- Near-Field Optical Microscopy
- Prosthetics and Rehabilitation Robotics
- Advanced Chemical Physics Studies
- Gamma-ray bursts and supernovae
- Adhesion, Friction, and Surface Interactions
- Strong Light-Matter Interactions
- Spectroscopy and Quantum Chemical Studies
- Pulsars and Gravitational Waves Research
- Advanced Materials Characterization Techniques
- Geomagnetism and Paleomagnetism Studies
Chinese Academy of Sciences
2007-2024
Purple Mountain Observatory
2017-2024
Institute of Automation
2024
Shandong Institute of Automation
2024
Shanghai Ninth People's Hospital
2024
Shanghai Jiao Tong University
2024
Jiangsu University of Science and Technology
2024
National Astronomical Observatories
2020-2023
University of Chinese Academy of Sciences
2007-2023
Beijing Normal University
2023
We present an analysis of local molecular clouds (-6 <VLSR< 30 km/s, i.e., <1.5 kpc) in the first Galactic quadrant (25.8{\deg} <l<49.7{\deg} and |b|<5{\deg}), a pilot region Milky Way Imaging Scroll Painting (MWISP) CO survey. Using SCIMES algorithm to divide large into moderate-sized ones, we determined distances 28 with background-eliminated extinction-parallax (BEEP) method using Gaia DR2 parallax measurements aided by AG AV, distance ranges from 250 pc about 1.5 kpc. These incomplete...
Abstract We have obtained column density maps for an unbiased sample of 120 molecular clouds in the third quadrant Milky Way midplane ( b ≤ ∣5∣°) within Galactic longitude range from 195° to 225°, using high-sensitivity 12 CO and 13 J = 1 − 0) data Imaging Scroll Painting (MWISP) project. The probability functions hydrogen clouds, N-pdfs, are fitted with both a lognormal (LN) function plus power-law (LN+PL) function. classified into three categories according their shapes i.e., LN, LN+PL, UN...
New experiments using scanning probe microcopies and advanced optical methods allow us to study molecules as individuals, not just populations. The findings of these studies only include the confirmation results expected from bulk matter, but also give substantially new information concerning complexity biomolecules or in a structured environment. technique lays groundwork for achieving control an individual molecule's motion. Ultimately, this work may lead such practical applications...
This work was conducted to optimize an accelerated solvent extraction for ultra high performance liquid chromatography-mass spectrometry/mass spectrometry analysis of blueberry phenolic compounds. The conditions were verified using response surface methodology obtain the following optimized conditions: ethanol concentration (pH = 3), 48%; temperature, 50℃, and static cycle times, 3. Further, chromatography with quadrupole Exactive Orbitrap mass triple-quadrupole tandem methods determination...
The progresses on production cross-sections of unknown nuclei in fusion evaporation (FE) reactions and multinucleon transfer (MNT) are reviewed. synthesis the superheavy (SHN) with [Formula: see text], 119, 120, 121, 122 FE is presented. As a promising pathway to produce neutron-rich nuclei, MNT near Coulomb barrier applied investigate generation heavy transuranium nuclei. predicted summarized. We make comparison radioactive beam-induced process for producing double magic text]Fl, which...
Abstract We compare the observational properties between 12 CO, 13 and C 18 O summarize parameters based on a 7069-cloud sample from Milky Way Imaging Scroll Painting CO survey in section of third Galactic quadrant. find that angular area ( <?CDATA ${A}_{{}^{13}\mathrm{CO}}$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi>A</mml:mi> </mml:mrow> <mml:msup> <mml:mrow /> <mml:mn>13</mml:mn> </mml:msup> <mml:mi>CO</mml:mi> </mml:msub>...
Self-organized monolayer domains of liquid crystal (LC) on mica surface were investigated by contact mode atomic force microscopy (AFM) and friction (FFM). By analyzing contributions to the apparent height in AFM images, we calculated forces relevant coefficients. It is observed that difference between magnitude LC monolayers was proportional normal load. The coefficients bare obtained as 0.076 0.094, respectively. In addition, frictional asymmetry our study, which attributed molecular tilt,...
The adsorption of gases N2, H2, O2, and NH3 that play a role in ammonia synthesis have been studied on the Fe(111) crystal surface by Sum Frequency Generation (SFG) vibrational spectroscopy using an integrated ultrahigh vacuum/high-pressure system. SFG spectra are presented for dissociation intermediates, NH2 (∼3325 cm-1) NH (∼3235 under high pressure (200 Torr) clean surface. Addition 0.5 Torr oxygen to 200 does not significantly change bonding intermediates However, it leads phase nearly...
Abstract We present results of cloud catalogs 12 CO, 13 and C 18 O ( J = 1–0) in a section the third Galactic quadrant over (195° < l 220°, ∣ b 5°) from Milky Way Imaging Scroll Painting project. The data were acquired with PMO 13.7 m millimeter telescope ∼50″angular resolution. construct three molecular containing information position–position–velocity (PPV) cubes. CO catalog contains 7069 samples identified based on DBSCAN algorithm. develop new algorithm, stacking bump for identifying...
The pulsar B0458+46 was previously believed to have a distance of about 1.3$~$kpc and be associated with nearby supernova remnant, SNR HB9 (G160.9+2.6). We observe the neutral hydrogen (HI) absorption spectrum PSR by using Five-hundred-meter Aperture Spherical radio Telescope (FAST), detect two lines at radial velocities $V_{\rm LSR} = {-7.7}~{\rm km~s}^{-1}$ $-28.1~{\rm km~s^{-1}}$. Based on Galactic rotation curve modification factor correcting for systematic stream in anticenter region,...
Imaging surveys of CO and other molecular transition lines are fundamental to measuring the large-scale distribution gas in Milky Way. Due finite angular resolution sensitivity, however, observational effects inevitable surveys, but few studies available on extent uncertainties involved. The purpose this work is investigate dependence observations (beam sizes), sensitivity (noise levels), distances, tracers. To end, we use high-quality images a region (25.8 <l< 49.7 deg |b|<5 deg) mapped by...
Marine submerged buoys can effectively obtain various parameters of seawater, which plays an important role in the research marine physical phenomena, environmental changes, and climate change. However, traditional self-contained usually work underwater at a depth about 100 m, observation data cannot be obtained before their recovery, satisfy needs real-time acquisition for scientific research. To solve this problem, paper proposes communication subsurface mooring system that consists...
Organsilane self-assembled monolayers (SAMs) deposited on mica (APTES/mica and OTS/mica) were investigated by friction force microscopy in air. The frictional as a function of load was found not to be entirely subject linear law, especially when the loads kept low. JKR model, DMT transition regime between these two can employed describe nanoscale contacts. We analyzed fitted measured data using modified Carpick's equation. parameter, α, extracted from fitting used determine which model...
Abstract We present analyses of the 13 CO abundance <?CDATA ${X}_{{}^{13}\mathrm{CO}}$?> and ratio ${X}_{{}^{13}\mathrm{CO}}/{X}_{{{\rm{C}}}^{18}{\rm{O}}}$?> molecular clouds by collecting 12 CO, C 18 O (1–0) transitions toward Galactic anti-center in ranges $186\buildrel{\circ}\over{.} 25\,\lt l\lt 195\buildrel{\circ}\over{.} 25$?> $-3\buildrel{\circ}\over{.} 75\lt b\lt 2\buildrel{\circ}\over{.} 75$?> . The $9^\circ \times 6\buildrel{\circ}\over{.} 5$?> area contains eight clouds, which can...
We present the survey of $^{12}$CO/$^{13}$CO/C$^{18}$O (J=1-0) toward California Molecular Cloud (CMC) within region 161.75$^{\circ} \leqslant l \leqslant$ 167.75$^{\circ}$,-9.5$^{\circ} b $-7.5$^{\circ}$, using Purple Mountain Observatory (PMO) 13.7 m millimeter telescope. Adopting a distance 470 pc, mass observed molecular cloud estimated from $^{12}$CO, $^{13}$CO, and C$^{18}$O is about 2.59$\times$10$^{4}$ M$_\odot$, 0.85$\times$10$^{4}$ 0.09$\times$10$^{4}$ respectively. A large-scale...
Abstract We present observations of the J = 1 – 0 transition lines 12 CO, 13 and C 18 O toward Galactic region 153.°60 ≤ l 156.°50 1.°85 b 3.°50, using Purple Mountain Observatory 13.7 m millimeter telescope. Based on CO data, one main filament five subfilaments are found together as a network structure in velocity interval [−42.5, −30.0] km s −1 . The kinematic distance this molecular cloud is estimated to be ∼4.5 kpc. median length, width, excitation temperature, line mass these filaments...
We present a large-scale mapping toward the GEM OB1 association in galactic anti-center direction. The 9^deg * 6.5^deg area was mapped 12CO, 13CO, and C18O with 50" angular resolution at 30" sampling. region divided into four main components based on spatial distribution velocity: Gemini Giant Molecular Cloud (GGMC) Complex, Lynds Dark Clouds West Front Clouds, Swallow Horn, Remote Clouds. GGMC Complex is located Perseus arm, while are Local arm. Horn revealed for first time this paper. two...
Abstract The principle of the background-eliminated extinction-parallax (BEEP) method is examining extinction difference between on- and off-cloud regions to reveal jump caused by molecular clouds, thereby revealing distance in complex dust environments. BEEP requires high-quality images clouds high-precision stellar parallaxes data, which can be provided Milky Way Imaging Scroll Painting (MWISP) CO survey Gaia DR2 catalog, as well supplementary A V data. In this work, further improved...
We discovered and studied an ultraluminous X-ray source (CXOU J203451.1+601043) that appeared in the spiral galaxy NGC 6946 at some point between 2008 February 2012 May, has remained luminosities $\approx$2-4 $\times 10^{39}$ erg s$^{-1}$ all observations since then. Our spectral modelling shows is generally soft, but with variability from epoch to epoch. Using standard empirical categories of regimes, we find CXOU J203451.1+601043 was consistent a broadened disk state 2012, transitional...
Here we report the spectral-timing results of black hole X-ray binary 4U 1630-47 during its 2021 outburst using observations from Hard Modulation Telescope. Type-C quasi-periodic oscillations (QPOs) in 1.6--4.2 Hz and quasi-regular modulation (QRM) near 60 mHz are detected outburst. The QRM has a fractional rms 10%--16% 8--35 keV energy band with Q factor (frequency/width) 2--4. Benefiting broad hxmt, study dependence 1--100 for first time. We find that increases photon energy, while time...