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phase transition of multi-component(TizrVNb)C ceramics—part I:phase decomposition induced by carbon content

Journal of Advanced Ceramics 2024年第5期13卷 679-688页

作者： Qingyi Kong Rao zhang Lei Chen Sijia huo Wenyu Lu yujin wang Boxin wei yu zhou Institute for Advanced Ceramics School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150080China Key Laboratory of Advanced Structure‒Function Integrated materials and Green manufacturing Technology Harbin Institute of TechnologyHarbin 150001China School of materials Science and Chemical Engineering Harbin University of Science and TechnologyHarbin 150001China National Key Laboratory of precision hot processing of metals Harbin Institute of TechnologyHarbin 150001China

phase decomposition can effectively enhance the mechanical properties of carbide ceramics and can overcome the difficulty of enhancing the mechanical properties of single-phase multicomponent carbide *** this work,a series of nonstoichiometric(TizrVNb)Cx ceramics were prepared by spark plasma sintering(SpS)at different *** effects of the carbon content on the phase composition,microstructure evolution,and mechanical properties were investigated in *** decomposition occurred with decreasing carbon *** different solid solutions of(Ti,V)-rich and zr-rich phases formed from the decomposition of equimolar single-phase solid solutions,namely,the zr-poor phase and zr-rich phase,*** distribution of Nb element is relatively *** semicoherent interfaces between the zr-poor phase and the zr-rich phase can harden and strengthen effectively under the synergistic effect of grain *** with phase decomposition structures have apparent advantages compared to single-phase high-entropy *** work provides an important train of thought for the microstructure tailoring and properties optimization of multi-component carbide ceramics.

关键词： multicomponent ceramics nontoichiometry microstructure evolution phase decomposition mechanical properties

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Evidence for particle acceleration approaching peV energies in the W51 complex

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Science Bulletin 2024年第18期69卷 2833-2841页

作者： LhAASO Collaboration zhen Cao F.Aharonian Axikegu y.x.Bai y.W.Bao d.Bastieri x.J.Bi y.J.Bi W.Bian A.V.Bukevich Q.Cao W.y.Cao zhe Cao J.Chang J.F.Chang A.m.Chen E.S.Chen h.x.Chen Liang Chen Lin Chen Long Chen m.J.Chen m.L.Chen Q.h.Chen S.Chen S.h.Chen S.z.Chen T.L.Chen y.Chen N.Cheng y.d.Cheng m.y.Cui S.W.Cui x.h.Cui y.d.Cui B.z.dai h.L.dai z.G.dai danzengluobu x.Q.dong K.K.duan J.h.Fan y.z.Fan J.Fang J.h.Fang K.Fang C.F.Feng h.Feng L.Feng S.h.Feng x.T.Feng y.Feng y.L.Feng S.Gabici B.Gao C.d.Gao Q.Gao W.Gao W.K.Gao m.m.Ge L.S.Geng G.Giacinti G.h.Gong Q.B.Gou m.h.Gu F.L.Guo x.L.Guo y.Q.Guo y.y.Guo y.A.han m.hasan h.h.he h.N.he J.y.he y.he y.K.hor B.W.hou C.hou x.hou h.B.hu Q.hu S.C.hu d.h.huang T.Q.huang W.J.huang x.T.huang x.y.huang y.huang x.L.Ji h.y.Jia K.Jia K.Jiang x.W.Jiang z.J.Jiang m.Jin m.m.Kang I.Karpikov d.Kuleshov K.Kurinov B.B.Li C.m.Li Cheng Li Cong Li d.Li F.Li h.B.Li h.C.Li Jian Li Jie Li K.Li S.d.Li W.L.Li W.L.Li x.R.Li xin Li y.z.Li zhe Li zhuo Li E.W.Liang y.F.Liang S.J.Lin B.Liu C.Liu d.Liu d.B.Liu h.Liu h.d.Liu J.Liu J.L.Liu m.y.Liu R.y.Liu S.m.Liu W.Liu y.Liu y.N.Liu Q.Luo y.Luo h.K.Lv B.Q.ma L.L.ma x.h.ma J.R.mao z.min W.mitthumsiri h.J.mu y.C.Nan A.Neronov L.J.Ou p.pattarakijwanich z.y.pei J.C.Qi m.y.Qi B.Q.Qiao J.J.Qin A.Raza d.Ruffolo A.Sáiz m.Saeed d.Semikoz L.Shao O.Shchegolev x.d.Sheng F.W.Shu h.C.Song yu.V.Stenkin V.Stepanov y.Su d.x.Sun Q.N.Sun x.N.Sun z.B.Sun J.Takata p.h.T.Tam Q.W.Tang R.Tang z.B.Tang W.W.Tian C.wang C.B.wang G.W.wang h.G.wang h.h.wang J.C.wang Kai wang Kai wang L.p.wang L.y.wang p.h.wang R.wang W.wang x.G.wang x.y.wang y.wang y.d.wang y.J.wang z.h.wang z.x.wang zhen wang zheng wang d.m.wei J.J.wei y.J.wei T.Wen C.y.Wu h.R.Wu Q.W.Wu S.Wu x.F.Wu y.S.Wu S.Q.xi J.xia G.m.xiang d.x.xiao G.xiao y.L.xin y.xing d.R.xiong z.xiong d.L.xu R.F.xu R.x.xu W.L.xu L.xue d.h.yan J.z.yan T.yan C.W.yang C.y.yang F.yang F.F.yang L.L.yang m.J.yang R.z.yang W.x.yang y.h.yao z.G.yao L.Q.yin N.yin x.h.you z.y.you y.h.yu Q.yuan h.yue h.d.zeng T.x.zeng W.zeng m.zha B.B.zhang F.zhang h.zhang 不详 Key Laboratory of particle Astrophysics&Experimental physics division&Computing Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China TIANFU Cosmic Ray Research Center ChengduChina dublin Institute for Advanced Studies 31 Fitzwilliam Place2 DublinIreland max-planck-Institut for Nuclear physics P.O.Box 103980Heidelberg 69029Germany School of physical Science and Technology&School of Information Science and Technology Southwest Jiaotong UniversityChengdu 610031China School of Astronomy and Space Science Nanjing UniversityNanjing 210023China Center for Astrophysics Guangzhou UniversityGuangzhou 510006China Tsung-dao Lee Institute&School of physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Institute for Nuclear Research of Russian Academy of Sciences Moscow 117312Russia hebei Normal University Shijiazhuang 050024China University of Science and Technology of China Hefei 230026China State Key Laboratory of particle detection and Electronics China Key Laboratory of dark matter and Space Astronomy&Key Laboratory of Radio Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China Research Center for Astronomical Computing Zhejiang LaboratoryHangzhou 311121China Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China School of physics and Astronomy Yunnan UniversityKunming 650091China Key Laboratory of Cosmic Rays(Tibet University) Ministry of EducationLhasa 850000China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China School of physics and Astronomy(zhuhai)&School of physics(Guangzhou)&Sino-French Institute of Nuclear Engineering and Technology(zhuhai) Sun Yat-sen UniversityZhuhai 519000&Guangzhou 510275GuangdongChina Institute of Frontier and Interdisciplinary Science Shandong UniversityQingdao 266237China ApC UniversitéParis Cité

Theγ-ray emission from the W51 complex is widely acknowledged to be attributed to the interaction between the cosmic rays(CRs)accelerated by the shock of supernova remnant(SNR)W51C and the dense molecular clouds in the adjacent star-forming region,***,the maximum acceleration capability of W51C for CRs remains *** on observations conducted with the Large high Altitude Air Shower Observatory(LhAASO),we report a significant detection ofγrays emanating from the W51 complex,with energies from 2 to 200 *** LhAASO measurements,for the first time,extend theγ-ray emission from the W51 complex beyond 100 TeV and reveal a significant spectrum bending at tens of *** combining the"π^(0)-decay bump"featured data from Fermi-LAT,the broadbandγ-ray spectrum of the W51 region can be well-characterized by a simple pp-collision *** observed spectral bending feature suggests an exponential cutoff at~400 TeV or a power-law break at~200 TeV in the CR proton spectrum,most likely providing the first evidence of SNRs serving as CR accelerators approaching the peV ***,two young star clusters within W51B could also be theoretically viable to produce the most energeticγrays observed by *** findings strongly support the presence of extreme CR accelerators within the W51 complex and provide new insights into the origin of Galactic CRs.

关键词： UhE c-ray Cosmic rays SNR W51C Star clusters

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Enhanced photocatalytic performance of Bi_(2)O_(2)CO_(3)/Bi_(4)O_(5)Br_(2)/reduced graphene oxide z-schemehe terojunction via a one-pot room-temperature synthesis

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Journal of Environmental Sciences 2024年第4期138卷 418-427页

作者： xiaoge Wu Lei yan Rongrong Qin Qikai zhang wei yang xiaozhi wang yongcai zhang min Luo Jianhua hou College of Environmental Science and Engineering Yangzhou UniversityYangzhouJiangsu 225009China Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization Nanjing 210095China Beijing xinfeng Aerospace Equipment Co. Ltd.Beijing 100854China Beijing System design Institute of Electro-mechanic Engineering Beijing 100005China College of Chemistry and Chemical Engineering Ningxia UniversityYinchuanNingxia 750021China

Bi_(2)O_(2)CO_(3)(BOC)/Bi_(4)O_5Br_(2)(BOB)/reduced graphene oxide(rGO)z-scheme heterojunction with promising photocatalytic properties was synthesized via a facile one-pot room-temperature ***-thin nanosheets of BOC and BOB were grown in situ on r *** formed 2d/2d direct z-scheme heterojunction of BOC/BOB with oxygen vacancies(OVs)effectively leads to lower negative electron reduction potential of BOB as well as higher positive hole oxidation potential of BOC,showing improved reduction/oxidation ***,rGO is an acceptor of the electrons from the conduction band of *** dual roles significantly improve the transfer performance of photo-induced charge carriers and accelerate their *** layered nanosheet structure,rich OVs,high specific surface area,and increased utilization efficiency of visible light,the multiple synergistic effects of BOC/BOB/rGO can achieve effective generation and separation of the electron-holes,thereby generating more·O_(2)^(-)and h^(+).The photocatalytic reduction efficiency of CO_(2)to CO(12.91μmol/(g·hr))is three times higher than that of BOC(4.18μmol/(g·hr)).moreover,it also achieved almost 100%removal of Rhodamine B and cyanobacterial cells within 2 hours.

关键词： Bi_(2)O_(2)CO_(3) Bi_(4)O_(5)Br_(2) Reduced graphene oxide z-scheme heterojunction photocatalysis CO_(2)reduction

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由超拍电子伏特加速器产生的超高能伽马射线气泡

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Science Bulletin 2024年第4期69卷 449-457页

作者： LhAASO Collaboration zhen Cao Chuandong Gao Cong Li Ruo-yu Liu Ruizhi yang 不详 Key Laboratory of particle Astrophyics&Experimental physics division&Computing Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China TIANFU Cosmic Ray Research Center ChengduChina Institute of Frontier and Interdisciplinary Science Shandong UniversityQingdao 266237China School of Astronomy and Space Science Nanjing UniversityNanjing 210023China University of Science and Technology of China Hefei 230026China

We report the detection of aγ-ray bubble spanning at least 100deg2 in ultra-high energy(UhE)up to a few peV in the direction of the star-forming region Cygnus x,implying the presence super peVatron(s)accelerating protons to at least 10 peV.A log-parabola form with the photon indexΓ(E)=(2.71±0.02)+(0.11±0.02)×log10(E/10 TeV)is found fitting the gamma-ray energy spectrum of the bubble *** sources,“hot spots”correlated with very massive molecular clouds,and a quasi-spherical amorphousγ-ray emitter with a sharp central brightening are observed in the *** the core of~0.5°,spatially associating with a region containing massive OB association(Cygnus OB2)and a microquasar(Cygnus x-3),as well as previously reported multi-TeV sources,an enhanced concentration of UhEγ-rays is observed with 2 photons at energies above 1 *** general feature of the bubble,the morphology,and the energy spectrum,are reasonably reproduced by the assumption of a particle accelerator in the core,continuously injecting protons into the ambient medium.

关键词： Cosmic rays γ-rays Interstellar medium Star cluster

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multifunctional mOF@COF Nanoparticles mediated perovskite Films management Toward Sustainable perovskite Solar Cells

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Nano-micro Letters 2024年第9期16卷 195-208页

作者： yayu dong Jian zhang hongyu zhang wei wang Boyuan hu debin xia Kaifeng Lin Lin Geng yulin yang mIIT Key Laboratory of Critical materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangPeople’s Republic of China School of materials Science and Engineering East China Jiaotong UniversityNanchang 330013JiangxiPeople’s Republic of China School of materials Science and Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangPeople’s Republic of China

Although covalent organic frameworks(COFs)with highπ-conjugation have recently exhibited great prospects in perovskite solar cells(pSCs),their further application in pSCs is still hindered by face-to-face stacking and aggregation ***,metal-organic framework(mOF-808)is selected as an ideal platform for the in situ homogeneous growth of a COF to construct a core-shell mOF@COF nanoparticle,which could effectively inhibit COF stacking and *** synergistic intrinsic mechanisms induced by the mOF@COF nanoparticles for reinforcing intrinsic stability and mitigating lead leakage in pSCs have been *** complementary utilization ofπ-conjugated skeletons and nanopores could optimize the crystallization of large-grained perovskite films and eliminate *** resulting pSCs achieve an impressive power conversion efficiency of 23.61%with superior open circuit voltage(1.20 V)and maintained approximately 90%of the original power conversion efficiency after 2000 h(30-50%Rh and 25-30℃).Benefiting from the synergistic effects of the in situ chemical fixation and adsorption abilities of the mOF@COF nanoparticles,the amount of lead leakage from unpackaged pSCs soaked in water(ppm)satisfies the laboratory assessment required for the Resource Conservation and Recovery Act Regulation.

关键词： perovskite solar cells Covalent organic frameworks metal-organic frameworks Lead leakage Stability

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Graphene enhances artemisinin production in the traditional medicinal plant Artemisia annua via dynamic physiological processes and miRNA regulation

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plant Communications 2024年第3期5卷 31-46页

作者： Junfeng Cao zhiwen Chen Luyao wang Ning yan Jialing Lin Lipan hou yongyan zhao Chaochen huang Tingting Wen Chenyi Li Saeed ur Rahman zehui Liu Jun Qiao Jianguo zhao Jie wang yannan Shi wei Qin Tong Si yuliang wang Kexuan Tang Frontiers Science Center for Transformative molecules Joint International Research Laboratory of Metabolic and Developmental SciencesPlant Biotechnology Research CenterFudan-SJTU Nottingham Plant Biotechnology R&D CenterSchool of Agriculture and BiologyShanghai Jiao Tong UniversityShanghai 200240China Engineering Research Center of Coal-based Ecological Carbon Sequestration Technology of the ministry of Education Key Laboratory of Graphene Forestry Application of National Forest and Grass AdministrationShanxi Datong UniversityDatong 037009China National Key Laboratory of plant molecular Genetics Institute of Plant Physiology and Ecology/CAS Center for Excellence in Molecular Plant SciencesChinese Academy of SciencesShanghai 200032China hainan Institute Zhejiang UniversityYongyou Industry ParkYazhou Bay Sci-Tech CitySanya 572000China College of Agriculture and Biotechnology Zhejiang UniversityHangzhou 310058China Shandong provincial Key Laboratory of dryland Farming Technology College of AgronomyQingdao Agricultural UniversityQingdao 266109China Institute of millet Crops Hebei Academy of Agriculture&Forestry Sciences/Hebei Branch of China National Sorghum Improvement CenterShijiazhuang 050035China

We investigated the effects of graphene on the model herb Artemisia annua,which is renowned for produc-ing artemisinin,a widely used pharmacological *** growth and biomass were promoted when *** was cultivated with low concentrations of graphene,an effect which was attributed to a 1.4-fold increase in nitrogen uptake,a 15%–22%increase in chlorophyllfluorescence,and greater abun-dance of carbon cycling–related *** to 10 or 20 mg/L graphene resulted in a�60%increase in h2O2,and graphene could act as a catalyst accelerator,leading to a 9-fold increase in catalase(CAT)ac-tivity in vitro and thereby maintaining reactive oxygen species(ROS)***,graphene exposure led to an 80%increase in the density of glandular secreting trichomes(GSTs),in which artemisinin is biosynthesized and *** contributed to a 5%increase in artemisinin content inmature ***-estingly,expression of miR828 was reduced by both graphene and h2O2 treatments,resulting in induction of its target gene AamyB17,a positive regulator of GST *** molecular and genetic assays showed that graphene-induced h2O2 inhibits micro-RNA(miRNA)biogenesis through dicers and regulates the miR828–AamyB17 module,thus affecting GST *** results suggest that graphene may contribute to yield improvement in *** via dynamic physiological processes together with miRNA regulation,and it may thus represent a new cultivation strategy for increasing yield capacity through nanobiotechnology.

关键词： Artemisia annua artemisinin glandular secreting trichomes GSTs miRNA graphene

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Remarkable enhancement of gas selectivity on organosilica hybrid membranes using urea-modulated metal-organic framework nanoparticles

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Frontiers of Chemical Science and Engineering 2024年第2期18卷 83-92页

作者： yayun zhao dechuan zhao Chunlong Kong yichao Lin xuezhen wang Liang Chen Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of zhejiang province Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China University of Chinese Academy of Sciences Beijing 100049China Collaboration Innovation Center for Tissue Repair material Engineering Technology China West Normal UniversityNanchong 637009China

metal-organic framework/organosilica hybrid membranes on tubular ceramic substrates have shown great potential for the implementation of membrane technology in practical gas separation projects due to their higher permeance compared to commercial ***,the selectivities of the reported membranes are ***,we have incorporated urea-modulated metal-organic frameworks into organosilica membranes to greatly enhance its separation *** urea-modulated metal-organic frameworks exhibit less-defined edges of crystallographic facets and high defect *** can be well-dispersed in the organosilica layer,which substantially suppresses the interfacial defects between metal-organic frameworks and organosilica,which is beneficial for improving the selectivity of membranes for gas *** results have shown that the enhanced ideal selectivity of h_(2)/Ch_(4) was 165 and that of CO_(2)/Ch_(4) was 43,with h_(2) permeance of about 1.25×10^(−6) mol·m^(−2)·s^(−1)·pa^(−1) and CO_(2) permeance of 3.27×10^(−7) mol·m^(−2)·s^(−1)·pa^(−1) at 0.2 mpa and 25℃.In conclusion,the high level of hybrid membranes can be used to separate h_(2)(or CO_(2))from the binary gas mixture h_(2)/Ch_(4)(or CO_(2)/Ch_(4)),which is important for gas separation in practical ***,the simple and feasible modulation of metal-organic framework is a promising strategy to tune different metal-organic frameworks for membranes according to the actual demands.

关键词： zIF-8 nanocrystals urea organosilica hybrid membrane enhanced separation performance

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Intermediate-mass black holes in Green pea galaxies(ImBh-Gp)I:A candidate sample from LAmOST and SdSS

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Science China(physics,mechanics & Astronomy) 2024年第10期67卷 147-161页

作者： Ruqiu Lin zhen-ya zheng Fang-Ting yuan Jun-xian wang Chunyan Jiang Ning Jiang Lingzhi wang Linhua Jiang xiang Ji Shuairu zhu xiaodan Fu Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China School of Astronomy and Space Sciences University of Chinese Academy of SciencesBeijing 100049China CAS Key Laboratory for Research in Galaxies and Cosmology Department of AstronomyUniversity of Science and Technology of ChinaHefei 230026China Chinese Academy of Sciences South America Center for Astronomy(CASSACA) National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China CAS Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China department of Astronomy School of PhysicsPeking UniversityBeijing 100871China

The scaling relation of central massive black holes(m_(Bh)s)and their host galaxies is well-studied for supermassive Bhs(Sm_(Bh)s,m_(Bh)≥10^(6)m_(⊙)).however,this relation has large uncertainties in the mass range of the intermediate-mass Bhs(Im_(Bh)s,m_(Bh)~10^(3)-10^(6)m_(⊙)).Since Green pea(Gp)galaxies are luminous compact dwarf galaxies,which may be likely to host less massive Sm_(Bh)s or even Im_(Bh)s,we systematically search for m_(Bh)s in a large sample of 2190 Gp galaxies at zd from LAmOST and SdSS spectroscopic ***,we report a newly discovered sample of 59 m_(Bh) candidates with broad hα*** sample has a median stellar mass of 108.83±0.11m_(⊙)and hosts m_(Bh)s with single-epoch virial masses ranging from m_(Bh)~10^(4.7)to 10^(8.5)m_(⊙)(median 105.85±0.64m_(⊙)).Among the 59 m_(Bh) candidates,36 have black hole masses m_(Bh)≤10^(6)m_(⊙)(Im_(Bh) candidates),one of which even has m_(Bh)■10^(5)m_(⊙).We find that the m_(Bh)-m_(*)relation of our m_(Bh) sample is consistent with the m_(Bh)-m_(bulge)relation for Sm_(Bh)s,while is above the m_(Bh)-m_(*)relation for m_(Bh)s in dwarf galaxies in the same mass ***,we show that 25 m_(Bh) candidates,including 4 Im_(Bh) candidates,have additional evidence of black hole activities,assessed through various methods such as the broad-line width,BpT diagram,mid-infrared color,x-ray luminosity,and radio *** studies show that it is very promising to find Im_(Bh)s in Gp galaxies,and the Bh sample so obtained enables us to probe the connection between the m_(Bh)s and compact dwarf galaxies in the low-redshift Universe.

关键词： SmBhs ImBhs Green pea galaxies compact dwarf galaxies

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The dynamics beamline at SSRF

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Nuclear Science and Techniques 2024年第9期35卷 56-67页

作者： zhen Liu Li-hua wang yong Jiang ya-Jun Tong hua-Chun zhu Te Ji min Chen zheng Jiang xiang-Jun wei Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201204China ShanghaiTech University Shanghai 201210China

The dynamics beamline(d-Line),which combines synchrotron radiation infrared spectroscopy(SR-IR)and energy-disper-sive x-ray absorption spectroscopy(Ed-xAS),is the first beamline in the world to realize concurrent Ed-xAS and SR-IR measurements at the same sample position on a millisecond time-resolved *** combined technique is effective for investigating rapid structural changes in atoms,electrons,and molecules in complicated disorder systems,such as those used in physics,chemistry,materials science,and extreme ***,Ed-xAS and SR-IR can be used independently in the two branches of the *** Ed-xAS branch is the first Ed-xAS beamline in China,which uses a tapered undulator light source and can achieve approximately 2.5×10^(12)photons/s·300 eV BW@7.2 keV at the sample *** exchange-able polychromator operating in the Bragg-reflection or Laue-transmission configuration is used in different energy ranges to satisfy the requirements for beam size and energy *** focused beam size is approximately 3.5μm(h)×21.5μm(V),and the x-ray energy range is 5–25 *** one-and two-dimensional position-sensitive detectors with frame rates of up to 400 khz enables time resolutions of tens of microseconds to be *** distinctive techniques,such as the concurrent measurement of in situ Ed-xAS and infrared spectroscopy,time-resolved Ed-xAS,high-pressure Ed-xAS,xmCd,and pump-probe Ed-xAS,can be applied to achieve different scientific goals.

关键词： Ed-xAS SR-IR Time-resolved d-line SSRF

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Long-term Integration Ability of the Submillimeter Wave Astronomy Satellite(SWAS)Spectral Line Receivers

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Research in Astronomy and Astrophysics 2024年第6期24卷 315-322页

作者： Bing-Ru wang di Li paul F.Goldsmith Jingwen Wu Chao-wei Tsai Rudolf Schieder Gary J.melnick National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Research Center for Astronomical Computing Zhejiang LaboratoryHangzhou 311100China Jet propulsion Laboratory California Institute of TechnologyPasadenaCA 91109USA Institute for Frontiers in Astronomy and Astrophysics Beijing Normal UniversityBeijing 102206China KOSmA I.Physik.InstitutUniversität zu KölnZülpicher Str.7750937 KölnGermany Center for Astrophysics|harvard&Smithsonian 60 Garden StreetMS 66CambridgeMA 02138USA

The Submillimeter Wave Astronomy Satellite(SWAS)was the first space telescope capable of high spectral resolution observations of terahertz spectral *** have investigated the integration ability of its two receivers and spectrometer during five and a half years of on-orbit *** CI,O_(2),h_(2)O,and^(13)CO spectra taken toward all observed Galactic sources were *** present results are based on spectra with a total integration time of up to 2.72×10~4hr(■10~8s).The noise in the spectra is generally consistent with that expected from the radiometer equation,without any sign of approaching a noise *** noise performance reflects the extremely stable performance of the passively cooled front end as well as other relevant components in the SWAS instrument throughout its mission lifetime.

关键词： telescopes space vehicles:instruments instrumentation:miscellaneous ISm:lines and bands

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