J/ApJS/263/13ivo://CDS.VizieR/J/ApJS/263/13doi:10.26093/cds/vizier.22630013CDSLiu X.Liu T.Shen Z.Qin S.-L.Luo Q.Cheng YuGu Q.Zhang T.,Zhu F.-Y.Liu S.-Y.Lu X.Zhao R.Zhong W.Wu Y.Li J.Zhao Z.,Wang J.Liu Q.Xia BoLi B.Fu LiYan Z.Zhang C.Wang L.Ye Q.,Tatematsu K.Liu H.Shang H.Xu F.Lee C.-F.Zhang C.Dutta S.2023-01-18T06:02:16Z2022-12-21T12:32:21ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frstar-forming-regionsmolecular-cloudsradio-astronomyWe have conducted a line survey toward Orion KL using the Q-band receiver of the Tianma 65m radio telescope (TMRT), covering 34.8-50GHz with a velocity resolution between 0.79 and 0.55km/s, respectively. The observations reach a sensitivity of the level of 1-8mK, proving that the TMRT is sensitive for conducting deep-line surveys. In total, 597 Gaussian features are extracted. Among them, 177 radio recombination lines (RRLs) are identified, including 126, 40, and 11 RRLs of hydrogen, helium, and carbon, with a maximum {Delta}n of 16, 7, and 3, respectively. The carbon RRLs are confirmed to originate from photodissociation regions with a V_LSR_~9km/s. In addition, 371 molecular transitions of 53 molecular species are identified. Twenty-one molecular species of this survey were not firmly detected in the Q band by Rizzo+ (2017, J/A+A/605/A76), including species such as H_2_CS, HCOOH, C_2_H_5_OH, H_2_^13^CO, H_2_CCO, CH_3_CHO, CH_2_OCH_2_, HCN {upsilon}_2_=1, and CH_3_OCHO {upsilon}_t_=1. In particular, the vibrationally excited states of ethyl cyanide (C_2_H_5_CN {upsilon}_13_/{upsilon}_21_) are for the first time firmly detected in the Q band. NH_3_ (15,15) and (16,16) are identified, and they are so far the highest transitions of the NH3 inversion lines detected toward Orion KL. All of the identified lines can be reproduced by a radiative transfer model.2022ApJS..263...13Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/263/13CatalogResearchIsServedByTAP VizieR generic servicerelated-toVI/64 : Recombination line intensities for hydrogenic ions (Storey+ 1995)J/A+A/327/1177 : Kinematics and electron temperatures in Orion A (Wilson+ 1997)J/ApJS/156/127 : 350{mu}m molecular line survey of Orion KL (Comito+, 2005)J/ApJS/175/277 : Submillimeter-Continuum SCUBA detections (Di Francesco+, 2008)J/A+A/559/A47 : Sgr B2(N) and Sgr B2(M) IRAM 30m line survey (Belloche+, 2013)J/ApJ/768/81 : Ethyl cyanide, CH_3_CH_2_CN, vibrational states (Daly+, 2013)J/A+A/559/A51 : HC_3_N in Orion KL (Esplugues+, 2013)J/A+A/581/A71 : Orion-KL substructure at 1.3mm (Feng+, 2015)J/A+A/581/A48 : 1.3cm line survey toward Orion KL (Gong+, 2015)J/A+A/601/A4 : IRC+10216 carbon chains mapped with ALMA (Agundez+, 2017)J/A+A/605/A76 : Spectrum of Orion KL between 41.5 and 50GHz (Rizzo+, 2017)J/A+A/606/A74 : IRC +10216 13.3GHz-18.5GHz spectrum (Zhang+, 2017)J/ApJ/849/139 : Interstellar acetone (CH_3_COCH_3_) in 3 regions (Zou+, 2017)J/A+A/627/A162 : L1489 starless core carbon-chain-producing region (Wu+, 2019)J/ApJ/900/L10 : X-band of the GOTHAM Large Project for TMC-1 (McGuire+, 2020)J/A+A/647/A42 : Detected CH_2_ spectra (Jacob+, 2021)J/A+A/658/A39 : 31.0-50.3 GHz observations of IRC+10216 (Pardo+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/263/13https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/263/13http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/263/13https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/263/13https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/263/13http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/263/13GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapRadiodefaultJ/ApJS/263/13/fig2The Orion KL spectrum in the Q band observed by the Tianma 65m radio telescope (TMRT)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFreq[34800.69/50001.01] Rest frequency (1)MHzem.freqdoubleTmb[-1.23/225.6] Brightness temperatureKphys.temperaturedoubleJ/ApJS/263/13/table3Line list with molecular lines and blended radio recombination lines (RRLs)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFobs[34824.24/49962.73] Observed frequency (G1)MHzem.freqdoublef_Fobs[b] Flag on Fobs (G2)meta.codecharSpeciesSpecies namemeta.id;phys.molFrest[34824/49962.84]? Rest frequencyMHzem.freqdoublenullableTransTransition identifier (1)meta.id;phys.atmol.transProb;phys.atmol.transitionEu[1.9/3523.2]? Upper level energyKphys.energy;phys.atmol.levelfloatnullableAij[0.003/11.7]? Einstein coefficient1e-06s**-1phys.atmol.transProbfloatnullableintTMBdV[0.01/640]? Integrated line intensityK.km/sphot.flux.densitydoublenullablee_intTMBdV[0.002/19]? Uncertainty in intTMBdVK.km/sstat.errorfloatnullableDeltaV[1/42]? Line widthkm/sspect.line.widthdoublenullablee_DeltaV[0.008/10]? Uncertainty in DeltaVkm/sstat.errorfloatnullableTMBpeak[0.0027/172]? Line peak intensityKphot.flux;spect.linedoublenullableJ/ApJS/263/13/table4Line list with unblended RRLsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFobs[34941.26/49728.35] Observed frequency (G1)MHzem.freqdoublef_Fobs[b] Flag on Fobs (G2)meta.codecharSpeciesSpecies namemeta.id;phys.molFrest[34940/49726.7] Rest frequencyMHzem.freqdoubleintTMBdV[0.04/45.8]? Integrated line intensityK.km/sphot.flux.densityfloatnullablee_intTMBdV[0.002/0.3]? Uncertainty in intTMBdVK.km/sstat.errorfloatnullableDeltaV[2.2/34]? Line widthkm/sspect.line.widthfloatnullablee_DeltaV[0.02/8]? Uncertainty in DeltaVkm/sstat.errorfloatnullableTMBpeak[0.004/1.7]? Line peak intensityKphot.flux;spect.linedoublenullable