Sheng‐Li Qin
A5070912090- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Molecular Spectroscopy and Structure
- Atmospheric Ozone and Climate
- Astro and Planetary Science
- Galaxies: Formation, Evolution, Phenomena
- Spectroscopy and Laser Applications
- Astronomy and Astrophysical Research
- Advanced Chemical Physics Studies
- Astrophysical Phenomena and Observations
- Plant Pathogens and Fungal Diseases
- Genomics and Phylogenetic Studies
- Atomic and Molecular Physics
- Astronomical Observations and Instrumentation
- Advanced Combustion Engine Technologies
- Radio Astronomy Observations and Technology
- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Space Exploration and Technology
- Phase Equilibria and Thermodynamics
- Scientific Research and Discoveries
- Plant-Microbe Interactions and Immunity
- Geophysical Methods and Applications
- Inorganic Fluorides and Related Compounds
- Actinomycetales infections and treatment
Yunnan University
2016-2025
China United Network Communications Group (China)
2024
Nanjing Foreign Language School
2024
Chinese Academy of Sciences
2004-2023
Xinjiang Astronomical Observatory
2023
University of Cologne
2010-2016
Yunnan Observatories
2015
Max Planck Institute for Radio Astronomy
2015
Max Planck Society
2015
National Astronomical Observatories
2004-2012
A statistical study of the properties molecular outflows is performed based on an up-to-date sample. 391 were identified in published articles or preprints before February 28, 2003. The parameters position, morphology, mass, energy, outflow dynamics and central source luminosity are presented for each source. Outflow lobe polarity known all sources, 84% found to be bipolar. sources divided into low mass high groups according either available bolometric mass. pace discovery over past seven...
We present initial results from the Herschel GT key program: observations of EXtra-Ordinary Sources (HEXOS) and outline promise potential spectral surveys with Herschel/HIFI. The HIFI instrument offers unprecedented sensitivity, as well continuous coverage across gaps imposed by atmosphere, opening up a largely unexplored wavelength regime to high-resolution spectroscopy. show spectrum Orion KL between 480 560 GHz 1.06 1.115 THz. From these data, we confirm that separately measures dust...
We model the dust and free-free continuum emission in high-mass star-forming region Sagittarius B2 order to reconstruct three-dimensional density temperature distribution, as a crucial input follow-up studies of gas velocity field molecular abundances. employ radiative transfer program RADMC-3D calculate self-consistently, provided given initial distribution. This distribution entire cloud complex is then recursively reconstructed based on available maps, including both single-dish...
ABSTRACT We investigate the presence of hub-filament systems in a large sample 146 active proto-clusters, using H13CO+ J = 1-0 molecular line data obtained from ATOMS survey. find that filaments are ubiquitous and very common dense core scales (∼0.1 pc) to clump/cloud (∼1–10 pc). The proportion proto-clusters containing decreases with increasing dust temperature (Td) luminosity-to-mass ratios (L/M) clumps, indicating stellar feedback H ii regions gradually destroys as evolve. Clear velocity...
ABSTRACT We present ALMA Band-3/7 observations towards ‘the Heart’ of a massive hub-filament system (HFS) SDC335, to investigate its fragmentation and accretion. At resolution ∼0.03 pc, 3 mm continuum emission resolves two dense cores MM1 MM2, with $383(^{\scriptscriptstyle +234}_{\scriptscriptstyle -120})$ M⊙ (10–24 % mass Heart’) $74(^{\scriptscriptstyle +47}_{\scriptscriptstyle -24})$ M⊙, respectively. With down 0.01 0.87 shows further fragments into six condensations multi-transition...
ABSTRACT We present a statistical study of sample 17 hub-filament-system (HFS) clouds high-mass star formation using high-angular resolution (∼1–2 arcsec) ALMA 1.3 and 3 mm continuum data. The includes eight infrared (IR)-dark nine IR-bright types, which correspond to an evolutionary sequence from the IR-dark stage. central massive clumps their associated most cores are observed follow trend increasing mass (M) surface density (Σ) with evolution In addition, mass-segregated cluster young...
Interstellar molecules are excellent tools for studying the physical and chemical environments of massive star-forming regions. In particular, vibrationally excited HC_3N (HC_3N*) lines key tracers probing hot cores environments. We present Atacama Large Millimeter/submillimeter Array (ALMA) 3 mm observations HC_3N* in 60 investigate how conditions affect excitation transitions. used XCLASS line identification. Under assumption local thermodynamic equilibrium, we derived rotation temperature...
Abstract We present Atacama Large Millimeter/submillimeter Array Band 6 (1.3 mm) observations of dense cores in three massive molecular clouds within the central zone (CMZ) Milky Way, including Dust Ridge cloud e, Sgr C, and 20 km s −1 cloud, at a spatial resolution 2000 au. Among 834 identified from 1.3 mm continuum, we constrain temperatures linewidths 253 using local thermodynamic equilibrium methods to fit H 2 CO and/or CH 3 CN spectra. determine their masses dust continuum derived...
We report the first detection of chloronium, H$_2$Cl$^+$, in interstellar medium, using HIFI instrument aboard \emph{Herschel} Space Observatory. The $2_{12}-1_{01}$ lines ortho-H$_2^{35}$Cl$^+$ and ortho-H$_2^{37}$Cl$^+$ are detected absorption towards NGC~6334I, $1_{11}-0_{00}$ transition para-H$_2^{35}$Cl$^+$ is NGC~6334I Sgr~B2(S). H$_2$Cl$^+$ column densities compared to those chemically-related species HCl. derived HCl/H$_2$Cl$^+$ density ratios, $\sim$1--10, within range predicted by...
A sensitive broadband molecular line survey of the Sagittarius B2(N) star-forming region has been obtained with Heterodyne Instrument for Far-Infrared (HIFI) instrument on Herschel Space Observatory, offering first high spectral resolution look at this well-studied source in a wavelength largely inaccessible from ground (625–157 μm). From roughly 8000 features survey, total 72 isotopologues arising 44 different molecules have identified, ranging light hydrides to complex organics, and...
A survey toward 674 Planck cold clumps of the Early Cold Core Catalogue (ECC) in J = 1–0 transitions 12CO, 13CO, and C18O has been carried out using Purple Mountain Observatory 13.7 m telescope. Six hundred seventy-three were detected with 12CO 13CO emission, 68% sample emission. Additional velocity components also identified. close consistency three line peak velocities was revealed for first time. Kinematic distances are given all components, half located within 0.5 1.5 kpc. Excitation...
The high-mass star forming sites SgrB2(M) and SgrB2(N) have been the target of numerous studies, revealing e.g. a rich chemistry. We want to characterize their physical chemical structure using ALMA high-angular resolution observations at mm wavelengths, reaching spatial scales about 4000 au, covering whole band 6 (from 211 275 GHz). In order determine continuum emission in line-rich sources, we use new statistical method: STATCONT. detect 27 sources 20 SgrB2(N). study across 6, compare it...
The "ATOMS," standing for {\it ALMA Three-millimeter Observations of Massive Star-forming regions}, survey has observed 146 active star forming regions with Band 3, aiming to systematically investigate the spatial distribution various dense gas tracers in a large sample Galactic massive clumps, study roles stellar feedback formation, and characterize filamentary structures inside clumps. In this work, observations, data analysis, example science "ATOMS" are presented, using case G9.62+0.19...
Abstract This paper is aimed at exploring the implications of velocity-dispersion scalings on high-mass star formation in molecular clouds, including Larson’s linewidth–size ( σ – R ) and ratio–mass surface density <?CDATA ${ \mathcal L }$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi class="MJX-tex-calligraphic" mathvariant="script">L</mml:mi> </mml:math> Σ; here = / 0.5 ). We have systematically analyzed parameter well-selected 221 massive clumps,...
Abstract Leveraging the high resolution, sensitivity, and wide frequency coverage of Atacama Large Millimeter/submillimeter Array (ALMA), QUARKS survey, standing for “Querying Underlying mechanisms massive star formation with ALMA-Resolved gas Kinematics Structures”, is observing 139 star-forming clumps at ALMA Band 6 ( λ ∼ 1.3 mm). This paper introduces Compact (ACA) 7 m data describing ACA observations reduction. Combining multi-wavelength data, we provide first edition atlas, offering...
The low dust temperatures (<14 K) of Planck Galactic cold clumps (PGCCs) make them ideal targets to probe the initial conditions and very early phase star formation. "TOP-SCOPE" is a joint survey program targeting ∼2000 PGCCs in J = 1–0 transitions CO isotopologues ∼1000 850 μm continuum emission. objective surveys (SMT 10 m, KVN 21 NRO 45 m) statistically study occurring during formation evolution molecular clouds, across wide range environments. observations, data analysis, example science...
We observed 146 Galactic clumps in HCN (4-3) and CS (7-6) with the Atacama Submillimeter Telescope Experiment (ASTE) 10-m telescope. A tight linear relationship between star formation rate gas mass traced by dust continuum emission was found for both high redshift (z>1) forming galaxies (SFGs), indicating a constant depletion time of ~100 Myr molecular z SFGs. However, low do not follow this relation seem to have longer global time. The correlations total infrared luminosities (L_TIR) line...
We have identified 453 compact dense cores in 3 mm continuum emission maps the ATOMS (ALMA Three-millimeter Observations of Massive Star-forming regions) survey, and compiled three catalogues high-mass star forming cores. One catalogue, referred to as H/UC-HII includes 89 that enshroud hyper/ultra (H/UC) HII regions characterized by associated H40alpha emission. A second pure s-cHMC, 32 candidate Hot Molecular Cores (HMCs) showing rich spectra (N>20lines) complex organic molecules (COMs) but...
We present a comprehensive study of the gas kinematics associated with density structures at different spatial scales in filamentary infrared dark cloud, G034.43+00.24 (G34). This makes use H13CO+ (1-0) molecular line data from ALMA Three-millimeter Observations Massive Star-forming regions (ATOMS) survey, which has and velocity resolution 0.04 pc 0.2 km/s, respectively. Several tens dendrogram have been extracted position-position-velocity space H13CO+, include 21 small-scale leaves 20...
Abstract There is growing evidence that high-mass star formation and hub-filament systems (HFS) are intricately linked. The gas kinematics along the filaments forming star(s) in central hub excellent agreement with new generation of global hierarchical models. In this paper, we present an observational investigation a typical HFS cloud, G310.142+0.758 (G310 hereafter), which reveals unambiguous mass inflow from cloud scale via onto protostar(s) at conforming model predictions. Continuum...
Abstract Only a handful of massive starless core candidates have been discovered so far, but none them fully confirmed. Within the MM1 clump in filamentary infrared dark cloud G34.43+0.24 that was covered by Atacama Large Millimeter/submillimeter Array (ALMA) ATOMS survey at Band 3 (∼2″, 6000 au) and ALMA-QUARKS 6 (∼0.″3, 900 au), two prestellar MM1-C E1 with masses 71 20 M ⊙ radii 2100–4400 au were discovered. The cores show no obvious sign star formation activities. In particular, is very...
We present the Submillimeter Array (SMA) observations of molecular lines at 330 and 340 GHz toward G19.61 − 0.23. The SMA have a spatial resolution ∼2'' bandpass 2 × bandwidth. With data, we detected 131 transitions. Ninety-four transitions from 17 species their isotopomers are identified, including complex organic molecules simple linear molecules. Most (CH3OH, 13CH3OH, C2H5OH, HCOOCH3, HNCO, NH2CHO, CH3CN, CH3CH2CN) sufficient number in this observation to allow analysis using rotational...
In this study, strain YIM 65004T, isolated from roots of Polyspora axillaris, was shown to represent a novel species the genus Micrococcus by means polyphasic approach. Chemotaxonomic data gathered for peptidoglycan type, menaquinones, phospholipids and fatty acids strongly supported classification within Micrococcus: cell-wall contained lysine, glutamic acid, alanine, glycine aspartic predominant menaquinones were MK-8(H2) (66.97 %) MK-7(H2) (23.26 %), diphosphatidylglycerol,...
We present Herschel/HIFI observations of the fundamental rotational transitions ortho- and para-H$_2^{16}$O H$_2^{18}$O in absorption towards Sagittarius~B2(M) W31C. The ortho/para ratio water foreground clouds on line sight these bright continuum sources is generally consistent with statistical high-temperature 3, within observational uncertainties. However, somewhat unexpectedly, we derive a low $2.35 \pm 0.35$, corresponding to spin temperature $\sim$27~K, at velocities expanding...
Stellar feedback from high-mass stars (e.g., H{\sc ii} regions) can strongly influence the surrounding interstellar medium and regulate star formation. Our new ALMA observations reveal sequential formation taking place within one sub-virial filamentary clump (the G9.62 clump) in G9.62+0.19 complex. The 12 dense cores (MM 1-12) detected by are at very different evolutionary stages, starless core phase to UC region phase. Three (MM6, MM7/G, MM8/F) associated with outflows. mass-velocity...