J/A+A/376/333ivo://CDS.VizieR/J/A+A/376/333doi:10.26093/cds/vizier.33760333CDSSharma A.K.Chandra S.2001-09-09T15:08:15Z2001-09-09T15:08:10ZCDS support team

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

cds-question@unistra.fratomic-physicsFollowing tentative detection of cyclopropene (C_3_H_4_) in Sgr B2 through its transition 3_22_-2_21_, several attempts to confirm the presence of cyclopropene in astronomical objects (including Sgr B2 itself) have been made. We suggest that cyclopropene may be observed in astronomical objects through its transition 2_20_-2_21_ at 3.67218GHz, in absorption, even against the cosmic 2.7K background, in a region having low density and low kinetic temperature.2001A&A...376..333Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/376/333CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+AS/114/175 : Einstein A-coefficients in CS transitions (Chandra+ 1995)J/A+AS/117/557 : Einstein coefficients for CO transitions (Chandra+ 1996)J/A+AS/131/137 : Einstein A-Coefficients in SiC2 transitions (Chandra+ 1998)J/A+AS/142/113 : C3H2 and SiC2 collisional rates (Chandra+, 2000)J/A+A/376/356 : Diatomic molecules collisional rates (Chandra+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/376/333https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/376/333http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/376/333https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/376/333https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/376/333http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/376/333GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/376/333/table1aOrtho-C_3_H_4_ Einstein A-coefficient, transition, and frequency of the transitionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAEinstein A-coefficients**-1phys.atmol.transProbdoubleTransTransitionmeta.id;phys.atmol.transitioncharFreqFrequency of transitionGHzem.freqdoubleJ/A+A/376/333/table1bPara-C_3_H_4_ Einstein A-coefficient, transition, and frequency of the transitionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAEinstein A-coefficients**-1phys.atmol.transProbdoubleTransTransitionmeta.id;phys.atmol.transitioncharFreqFrequency of transitionGHzem.freqdouble