Sheng‐Yuan Liu
A5055154054- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Molecular Spectroscopy and Structure
- Astro and Planetary Science
- Atmospheric Ozone and Climate
- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Advanced Chemical Physics Studies
- Astrophysical Phenomena and Observations
- Spectroscopy and Laser Applications
- Gamma-ray bursts and supernovae
- Advanced Combustion Engine Technologies
- Atomic and Molecular Physics
- Solar and Space Plasma Dynamics
- High-pressure geophysics and materials
- Tuberculosis Research and Epidemiology
- Adipose Tissue and Metabolism
- Planetary Science and Exploration
- Astronomical Observations and Instrumentation
- Eicosanoids and Hypertension Pharmacology
- Pulsars and Gravitational Waves Research
- Radio Astronomy Observations and Technology
- Calibration and Measurement Techniques
- Astrophysics and Cosmic Phenomena
- Folate and B Vitamins Research
Institute of Astronomy and Astrophysics, Academia Sinica
2015-2024
Chiayi Chang Gung Memorial Hospital
2024
National Taiwan University
2005-2024
Shenyang University of Technology
2023
Tianjin University of Traditional Chinese Medicine
2023
Shenzhen Nanshan Center for Chronic Disease Control
2012-2022
Xinqiao Hospital
2020
Army Medical University
2020
Theodore Roosevelt High School
2019
Guangdong Medical College
2013-2016
Abstract Spatially resolved structures in protoplanetary disks hint at unseen planets. Previous imaging observations of the transitional disk around MWC 758 revealed an inner cavity, a ring-like outer disk, emission clumps, and spiral arms, all possibly generated by companions. We present ALMA dust continuum 0.87 mm wavelength with 43 × 39 mas angular resolution (6.9 6.2 au) 20 μ Jy beam −1 rms. The central submillimeter cavity is to be eccentric; once deprojected, its edge can well fitted...
We present the first results from B-fields In STar-forming Region Observations (BISTRO) survey, using Sub-millimetre Common-User Bolometer Array 2 (SCUBA-2) camera, with its associated polarimeter (POL-2), on James Clerk Maxwell Telescope (JCMT) in Hawaii. discuss survey's aims and objectives. describe rationale behind questions which survey will aim to answer. The most important of these is role magnetic fields star formation process scale individual filaments cores dense regions. data...
Context. Molecular filaments and hubs have received special attention recently thanks to new studies showing their key role in star formation. While the (column) density velocity structures of both been carefully studied, magnetic field (B-field) properties yet be characterized. Consequently, B-fields formation evolution hub-filament systems is not well constrained. Aims. We aim understand B-field its interplay with turbulence gravity dynamical NGC 6334 filament network that harbours...
Abstract Protostellar outflows and jets are almost ubiquitous characteristics during the mass accretion phase encode history of stellar accretion, complex organic molecule (COM) formation, planet formation. Episodic likely connected to episodic through disk. Despite importance, studies on ejection links have not been done yet in a systematic fashion using high-sensitivity high-resolution observations. To explore mechanisms chronologies events, we investigated 39 fields containing protostars...
The protostellar jet driven by L1448C was observed in the SiO J = 8–7 and CO 3–2 lines, 350 GHz dust continuum at ∼1'' resolution with Submillimeter Array. A narrow from northern source L1448C(N) high-velocity CO. consists of a chain emission knots an inter-knot spacing ∼2'' (500 AU) semi-periodic velocity variation. These are likely to be internal bow shocks beam that were formed due periodic variation ejection period ∼15–20 yr. innermost pairs knots, which significant map but barely seen...
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...
HH 212 is one of the well-studied protostellar systems, showing first vertically resolved disk with a warm atmosphere around central protostar. Here we report detection 9 organic molecules (including newly detected ketene, formic acid, deuterated acetonitrile, methyl formate, and ethanol) in atmosphere, confirming that is, for 212, chemically rich component, identified before at lower resolution as "hot-corino". More importantly, systematic survey abundance measurement within $\sim$ 40 au...
Abstract The dependence of the polarization fraction p on total intensity I in polarized submillimeter emission measurements is typically parameterized as ∝ − α ( ≤ 1) and used to infer dust grain alignment efficiency star-forming regions, with an index = 1 indicating near-total lack grains magnetic field. In this work, we demonstrate that non-Gaussian noise characteristics may produce apparent ∼ even data significant signal-to-noise Stokes Q , U emission, so robust angle. We present a...
Nod-like receptor protein 3 (NLRP3) inflammasome-mediated inflammation has emerged as a contributor to epileptogenesis. Endoplasmic reticulum stress (ERS) plays an important role in epilepsy-induced neurodegeneration. NLRP3 activation and ERS reactions share the same induction factors, suggesting that these processes may be interdependent. However, correlation between TLE not been confirmed.The expression patterns of inflammasome ERS-related markers temporal neocortices patients were...
Abstract The James Clerk Maxwell Telescope (JCMT) Transient Survey has been monitoring eight Gould Belt low-mass star-forming regions since 2015 December and six somewhat more distant intermediate-mass 2020 February with the Submillimeter Common User Bolometer Array 2 on board JCMT at 450 850 μ m an approximately monthly cadence. We introduce our pipeline v2 relative calibration procedures for image alignment flux across epochs, improving previous v1 by decreasing measurement uncertainties...
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...
We present BIMA Array observations of formic acid (HCOOH) in Galactic hot molecular cores. It has been found that among nearly 120 interstellar and circumstellar species identified to date, the more complex saturated organic are usually observed cores—dense warm condensations associated with active star formation regions inside clouds. Formic acid, one molecules this category, shares common structural elements both methyl formate (HCOOCH3) acetic (CH3COOH). In study, we successfully mapped...
We present Berkeley-Maryland-Illlinois Association array observations of formic acid (HCOOH) at 1 mm toward the Orion KL region. Near compact ridge, HCOOH emission is spatially resolved; its partial shell morphology different from that other complex O-bearing molecules such as methyl formate and dimethyl ether. This unique distribution suggests located in a layer delineates interaction region between outflow ambient quiescent gas. also detected hot core. For both cases, ejection grain...
Arcsecond-resolution spectral observations toward the protobinary system IRAS 16293-2422 at 344 and 354 GHz were conducted using Submillimeter Array. Complex organic molecules such as CH3OH HCOOCH3 detected. Together with rich inventory revealed, it clearly indicates existence of two, rather than one, compact hot molecular cores (smaller or equal to 400 AU in radius) associated each components identified by their dust continuum emission inner star-forming core.
We present the first submm (865mum) imaging spectral line survey at one arcsecond resolution conducted with Submillimeter Array toward Orion-KL. Within 2x2 GHz bandpasses (lower and upper sidebands, 337.2-339.2GHz 347.2-349.2GHz), we find about 145 lines from 13 species, 6 isotopologues, 5 vibrational excited states. Most nitrogen-bearing molecules are strong hot core, whereas oxygen-bearing peak south-west in so-called compact ridge. Imaging of is shown to be an additional tool improve...
We have mapped the SiO J = 5-4 line at 217 GHz from HH 211 molecular outflow with Submillimeter Array (SMA). The high-resolution map (16 × 09) shows that emission comes central narrow jet along axis a width of ~08 (~250 AU) FWHM. consists chain knots separated by 3''-4'' (~1000 AU), and most counterparts in shocked H2 seen new, deep VLT near-infrared image outflow. A innermost pair been discovered just ±2'' star. ratio between data upper limits 1-0 Chandler & Richer suggests these...
We present studies of a massive protocluster AFGL5142 in the J=2-1 transition CO isotopologues, SO, CH_3OH and CH_3CN lines, as well continuum at 225 GHz 8.4 GHz. The emission reveals three prominent peaks MM-1, MM-2 MM-3. MM-1 are associated with strong temperatures 90 \pm 20 250 40 K, respectively, while both MM-3 faint Additional dust MM-4 MM-5 appear to be \h2O masers. With many sources cm mm wavelengths, those already identified infrared, this region is forming cluster stars. SO least...
We present the results of dust emission polarization measurements Ophiuchus-B (Oph-B) carried out using Submillimetre Common-User Bolometer Array 2 (SCUBA-2) camera with its associated polarimeter (POL-2) on James Clerk Maxwell Telescope (JCMT) in Hawaii. This work is part B-fields In Star-forming Region Observations (BISTRO) survey initiated to understand role magnetic fields star formation for nearby star-forming molecular clouds. a first look at geometry and strength Oph-B. The field...
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...
Abstract We present 850 μ m imaging polarimetry data of the ρ Oph-A core taken with Submillimeter Common-User Bolometer Array-2 (SCUBA-2) and its polarimeter (POL-2) as part our ongoing survey project, <?CDATA ${\boldsymbol{B}}$?> -fields In STar forming RegiOns (BISTRO). The polarization vectors are used to identify orientation magnetic field projected on plane sky at a resolution 0.01 pc. 10 subregions distinct fractions angles in 0.2 pc core; some them can be coherent structure Oph...
We present new observations of the active star-formation region NGC 1333 in Perseus molecular cloud complex from James Clerk Maxwell Telescope B-Fields In Star-forming Region Observations (BISTRO) survey with POL-2 instrument. The BISTRO data cover entire (~1.5 pc x 2 pc) at 0.02 resolution and spatially resolve polarized emission individual filamentary structures for first time. inferred magnetic field structure is as a whole, each filament aligned different position angles relative to...
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...
Abstract We present the B -fields mapped in IRDC G34.43+0.24 using 850 μ m polarized dust emission observed with POL-2 instrument at James Clerk Maxwell telescope. examine magnetic field geometries and strengths northern, central, southern regions of filament. The overall geometry is ordered aligned closely perpendicular to filament’s main axis, particularly containing central clumps MM1 MM2, whereas MM3 north has orientations its major axis. are uniform large (POL-2 14″ SHARP 10″) small...
We report 850~$\mu$m dust polarization observations of a low-mass ($\sim$12 $M_{\odot}$) starless core in the $\rho$ Ophiuchus cloud, C, made with POL-2 instrument on James Clerk Maxwell Telescope (JCMT) as part JCMT B-fields In STar-forming Region Observations (BISTRO) survey. detect an ordered magnetic field projected plane sky core. The across $\sim$0.1~pc shows predominant northeast-southwest orientation centering between $\sim$40$^\circ$ to $\sim$100$^\circ$, indicating that is well...