A5029011446- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Spectroscopy and Laser Applications
- Atmospheric Ozone and Climate
- Radio Astronomy Observations and Technology
- Molecular Spectroscopy and Structure
- Astronomical Observations and Instrumentation
- Adaptive optics and wavefront sensing
- CCD and CMOS Imaging Sensors
- Astro and Planetary Science
- Radiation Effects in Electronics
- Gas Dynamics and Kinetic Theory
- MXene and MAX Phase Materials
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced Measurement and Metrology Techniques
- thermodynamics and calorimetric analyses
- Laser Design and Applications
- Biosensors and Analytical Detection
- Cosmology and Gravitation Theories
- Photocathodes and Microchannel Plates
Purple Mountain Observatory
2015-2025
Chongqing University of Technology
2025
Chinese Academy of Sciences
2018-2024
University of Science and Technology of China
2020-2024
Wuhan University
2024
Renmin Hospital of Wuhan University
2024
Kavli Institute for the Physics and Mathematics of the Universe
2024
The University of Tokyo
2024
National Astronomical Observatory of Japan
2013-2018
Case Western Reserve University
2017
We used the Atacama Pathfinder Experiment (APEX) 12 m telescope to observe J_KaKc=3_03-2_02, 3_22-2_21, and 3_21-2_20 transitions of para-H_2CO at 218 GHz simultaneously determine kinetic temperatures dense gas in central molecular zone (CMZ) our Galaxy. The map extends over approximately 40 arcmin x 8 (~100x20 pc^2) along Galactic plane with a linear resolution 1.2 pc. strongest three lines, H_2CO (3_03-2_02) transition, is found be widespread, its emission shows spatial distribution...
The Galactic center is the closest region in which we can study star formation under extreme physical conditions like those high-redshift galaxies. We measure temperature of dense gas central molecular zone (CMZ) and examine what drives it. mapped inner 300 pc CMZ temperature-sensitive J = 3-2 para-formaldehyde (p-H$_2$CO) transitions. used $3_{2,1} - 2_{2,0} / 3_{0,3} 2_{0,2}$ line ratio to determine $n \sim 10^4 10^5 $cm$^{-3}$ gas. have produced maps cubes with 30" 1 km/s resolution...
We present initial results of very high resolution Atacama Large Millimeter/submillimeter Array (ALMA) observations the z = 3.042 gravitationally lensed submillimeter galaxy HATLAS J090311.6+003906 (SDP.81). These were carried out using a extended configuration as part Science Verification for 2014 ALMA Long Baseline Campaign, with baselines up to ∼15 km. continuum imaging at 151, 236, and 290 GHz unprecedented angular resolutions fine 23 mas, corresponding an unmagnified spatial scale ∼180...
We have obtained three-dimensional maps of the universe in $\sim200\times200\times80$ comoving Mpc$^3$ (cMpc$^3$) volumes each at $z=5.7$ and $6.6$ based on a spectroscopic sample 179 galaxies that achieves $\gtrsim80$\% completeness down to Ly$\alpha$ luminosity $\log(L_{\rm Ly\alpha}/[\mathrm{erg\ s^{-1}}])=43.0$, our Keck Gemini observations literature. The reveal filamentary large-scale structures two remarkable overdensities made out least 44 12 $z=5.692$ (z57OD) $z=6.585$ (z66OD),...
We present sensitive 850$\mu$m imaging of the COSMOS field using 640hr new and archival observations taken with SCUBA-2 at East Asian Observatory's James Clerk Maxwell Telescope. The survey (S2COSMOS) achieves a median noise level $\sigma_{850\mu{\mathrm{m}}}$=1.2mJy/beam over an area 1.6 sq. degree (MAIN; HST/ACS footprint), $\sigma_{850\mu{\mathrm{m}}}$=1.7mJy/beam additional 1 supplementary (SUPP) coverage. catalogue 1020 127 sources detected significance >4$\sigma$ >4.3$\sigma$ in MAIN...
We present an ALMA study of the ~180 brightest sources in SCUBA-2 map COSMOS field from S2COSMOS survey, as a pilot for AS2COSMOS - full survey ~1,000 this field. In we have obtained 870-um continuum maps essentially complete sample 182 sub-millimetre (S_850um=6.2mJy) COSMOS. Our detect 260 galaxies (SMGs) spanning range flux density S_870um=0.7-19.2mJy. more than one SMG counterpart 34+/-2 per cent sources, increasing to 53+/-8 brighter S_850um>12mJy. estimate that approximately one-third...
We present a set of multi-wavelength mosaics and photometric catalogs in the ALMA lensing cluster survey (ALCS) fields. The were built by reprocessing archival data from CHArGE compilation, taken $\textit{Hubble Space Telescope}$ ($\textit{HST}$) RELICS, CLASH Hubble Frontier Fields. Additionally we have reconstructed $\textit{Spitzer}$ IRAC 3.6 4.5 $\mu$m mosaics, utilising all available IRSA/SHA exposures. To alleviate effect blending such crowded region, modelled photometry convolving...
We present JWST/NIRCam observations of a strongly lensed, sub- L * , multiply imaged galaxy at z = 6.072, with magnification factors μ ≳ 20 across the galaxy. The has rich HST, MUSE, and ALMA ancillary broad wavelength range. Aiming to quantify reliability stellar mass estimates high redshift galaxies, we performed spatially resolved analysis physical properties scales ∼200 pc, inferred from spectral energy distribution (SED) modelling five imaging bands covering 0.16 μm < λ rest 0.63 on...
Abstract We report the physical properties of 18 brightest ( S 870 μ m = 12.4–19.2 mJy) and not strongly lensed m–selected dusty star-forming galaxies (DSFGs), also known as submillimeter (SMGs), in COSMOS field. This sample is part an ALMA band 3 spectroscopic survey (AS2COSPEC), redshifts are measured 17 them at z 2–5. perform spectral energy distribution analyses deduce a median total infrared luminosity L IR (1.3 ± 0.1) × 10 13 ⊙ , infrared-based star formation rate (SFR) SFR 1390 150 M...
Carbon and oxygen isotope ratios are excellent measures of nuclear processing, but few such data have been taken toward extragalactic targets so far. Therefore, using the IRAM 30-m telescope, CN CO isotopologues measured nearby starburst galaxy NGC 253 prototypical ultraluminous infrared Mrk 231. Toward center 253, 13CN N = 1 → 0 lines indicate no significant deviations from expected local thermodynamical equilibrium after accounting for moderate saturation effects (10 25%) in two detected...
We present a survey of the molecular gas in 61 submillimetre galaxies (SMGs) selected from 870$μ$m continuum surveys COSMOS, UDS and ECDFS fields, using Atacama Large Millimeter Array (ALMA) Northern Extended (NOEMA). 46 $^{12}$CO ($J=$2-5) emission lines are detected 45 targets at $z=$1.2-4.8, with redshifts indicating that those which bright undetected/faint optical/near-infrared typically lie higher redshifts, gradient $Δz/ΔS_{870}=$0.11$\pm$0.04mJy$^{-1}$. also supplement our data...
Abstract We report detections of two 1.2 mm continuum sources ( S ∼ 0.6 mJy) without any counterparts in the deep H - and/or K -band image (i.e., magnitude ≳26 mag). These near-infrared-dark faint millimeter are uncovered by ASAGAO, a and wide-field (≃26 arcmin 2 ) Atacama Large Millimeter/submillimeter Array (ALMA) survey. One has red IRAC (3.6 4.5 μ m) counterpart, other been independently detected at 850 870 m using SCUBA2 ALMA Band 7, respectively. Their optical-to-radio spectral energy...
We present the results of a ~60-hr observational campaign with ALMA targeting spectroscopically confirmed and lensed sub-$L^\star$ galaxy at z=6.07, identified during Lensing Cluster Survey (ALCS). sample dust continuum emission from rest frame 90 to 370 $\mu$m six different frequencies set constraining upper limits on molecular gas line content via CO(7-6) [CI](2-1) for two images $\mu\gtrsim20$. Complementing these sub-mm observations deep optical near-IR photometry spectroscopy JWST, we...
Abstract We present a statistical study of 180 dust continuum sources identified in 33 massive cluster fields by the Atacama Large Millimeter/submillimeter Array Lensing Cluster Survey (ALCS) over total 133 arcmin 2 area, homogeneously observed at 1.2 mm. ALCS enables us to detect extremely faint millimeter lensing magnification, including near-infrared (NIR) dark objects showing no counterparts existing Hubble Space Telescope and Spitzer images. The belong blind sample ( N = 141) with...
We have imaged in CO(2-1) the molecular gas NGC 1275 (Perseus A), cD galaxy at center of Perseus Cluster, a spatial resolution ~1 kpc over central region radius ~10 kpc. Per A is known to contain ~1.3 × 1010 M☉ gas, which has been proposed be captured from mergers with or ram pressure stripping gas-rich galaxies, accreted X-ray cooling flow. The detected our image total mass ~4 109 M☉, and for first time can seen concentrated three radial filaments lengths ranging least 1.1 2.4 kpc, all...
The SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES) is a three-year JCMT Large Program aiming at reaching the 450 $\mu$m confusion limit in COSMOS-CANDELS region, to study representative sample of high-redshift far-infrared galaxy population that gives rise bulk background. We present first-year data from STUDIES. have reached noise level 0.91~mJy for point sources map center, covered an area 151 arcmin$^2$, and detected 98 141 4.0 3.5 $\sigma$, respectively. Our derived counts are best...
We present an ALMA-Herschel joint analysis of sources detected by the ALMA Lensing Cluster Survey (ALCS) at 1.15 mm. Herschel/PACS and SPIRE data 100-500 $\mu$m are deblended for 180 in 33 lensing cluster fields that either securely (141 sources; our main sample) or tentatively S/N$\geq$4 with cross-matched HST/Spitzer counterparts, down to a delensed 1.15-mm flux density $\sim0.02$ mJy. performed far-infrared spectral energy distribution modeling derived physical properties dusty star...
ABSTRACT We study the nature of faint radio source population detected in MeerKAT International GHz Tiered Extragalactic Exploration (MIGHTEE) Early Science data COSMOS field, focusing on properties radio-loud active galactic nuclei (AGNs). Using extensive multiwavelength available we are able to classify 88 per cent 5223 sources field with host galaxy identifications as AGNs (35 cent) or star-forming galaxies (54 cent). select a sample redshifts out z ∼ 6 and luminosities 1020 &lt; L1.4...
We introduce an ALMA band 3 spectroscopic survey, targeting the brightest submillimeter galaxies (SMGs) in COSMOS field. Here we present first results based on 18 primary SMGs that have 870 $\mu$m flux densities of $S_{870}=12.4-19.3$ mJy and are drawn from a parent sample 260 ALMA-detected AS2COSMOS survey. detect emission lines 17 determine their redshifts to be range $z=2-5$ with median ${3.3\pm0.3}$. confirm brighter $S_{870}$ located at higher redshifts. The data additionally cover five...
Abstract Sub/millimeter galaxies are a key population for the study of galaxy evolution because majority star formation at high redshifts occurred in deeply embedded dust. To search this population, we have performed an extensive survey with Atacama Large Millimeter/submillimeter Array (ALMA), called ALMA Lensing Cluster Survey (ALCS). This covers 133 arcmin 2 area and securely detects 180 sources z ∼ 0.5–6 flux limit ∼0.2 mJy 1.2 mm. Here, report results multiwavelength spectral energy...
Abstract The short-lived ionized emission lines in early spectroscopy of the nearby Type II supernova SN 2024ggi signify presence dense circumstellar matter (CSM) close to its progenitor star. We proposed Atacama Large Millimeter/submillimeter Array (ALMA) observations by Director's Discretionary Time program catch potential synchrotron radiation associated with ejecta–CSM interaction. Multiepoch were conducted using ALMA band 6 at +8, +13, and +17 days after discovery. data show...
Realizing reliable online detection of characteristic gases (H2, C2H4, CO, and CO2) in lithium-ion batteries is crucial to maintain the safe stable operation power equipment new energy storage plants. In this study, transition metal Ptn (n = 1, 3, 4) clusters are attached MoSe2 nanosheets for first time based on density functional theory using perfect crystalline facet modification method, adsorption characteristics electronic behaviors H2, CO2 investigated enhanced. The results show that...
<title>Abstract</title> Early galaxy formation, initiated by the dark matter and gas assembly, evolves through frequent mergers feedback processes into dynamically hot, chaotic structures<sup>1</sup>. In contrast, cold, smooth rotating disks have been observed in massive evolved galaxies merely 1.4 billion years after Big~Bang<sup>2</sup>, suggesting rapid morphological dynamical evolution early Universe. Probing this mechanism necessitates studies of young galaxies, yet efforts hindered...
Abstract We present <?CDATA $\mathrm{HCN}\ J=4\to 3$?> and ${\mathrm{HCO}}^{+}\ maps of six nearby star-forming galaxies, NGC 253, 1068, IC 342, M82, M83, 6946, obtained with the James Clerk Maxwell Telescope as part MALATANG survey. All galaxies were mapped in central 2′ × region at 14″ (FWHM) resolution (corresponding to linear scales ∼0.2–1.0 kpc). The L IR – ′ dense relation, where gas is traced by emission, measured our sample spatially resolved found follow correlation established...
We present the survey design, data reduction, construction of images, and source catalog Atacama Large Millimeter/submillimeter Array (ALMA) twenty-six arcmin^2 GOODS-S at one-millimeter (ASAGAO). ASAGAO is a deep (1sigma ~ 61 uJy/beam for 250 klambda-tapered map with synthesized beam size 0.51" x 0.45") wide area (26 arcmin^2) on contiguous field 1.2 mm. By combining ALMA archival in GOODS-South field, we obtained deeper same region 30 klambda-taper, 0.59" 0.53"), providing largest sample...