J/ApJ/849/139ivo://CDS.VizieR/J/ApJ/849/139doi:10.26093/cds/vizier.18490139CDSZou L.Widicus Weaver S.L.2019-11-11T22:00:00Z2018-07-19T12:17:09ZCDS support team

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

cds-question@unistra.frstar-forming-regionsmolecular-physicsmillimeter-astronomysubmillimeter-astronomyWe present observations of interstellar acetone (CH_3_COCH_3_) detected in broadband line surveys in the 1.3mm band from the Caltech Submillimeter Observatory (CSO). The observations were conducted toward three massive star-forming regions: GAL31.41+0.31, GAL034.3+00.2, and GAL10.47+00.03. Numerous acetone lines were detected in these three sources. The results were analyzed using the assumption of local thermodynamic equilibrium. These results rigorously confirm the previous reports of acetone detections in GAL31.41+0.31 and GAL10.47+00.03, and add a new acetone detection in GAL034.3+00.2. Source-averaged column densities for acetone were determined to be 1.1(6)x10^16^cm^-2^ for GAL31.41+0.31, 6.4(3)x10^16^cm^-2^ for GAL10.47+00.03, and 1.3(3)x10^15^cm^-2^ for GAL034.3+00.2. The rotational temperatures of acetone in these three sources range from 49 to 132K, which suggests a complicated formation mechanism for interstellar acetone.2017ApJ...849..139Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/849/139CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/585/A23 : GOBASIC code (Rad+, 2016)J/A+A/568/A65 : NGC 7129 FIRS 2 interferometric 1-D spectrum (Fuente+, 2014)J/A+A/532/A32 : HCOOCH3 map of Orion-KL (Favre+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/849/139https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/849/139http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/849/139https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/849/139https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/849/139http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/849/139GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/849/139/regions (Observational parameters and beam-averaged and source-averaged fit results of acetone lines using the GOBASIC program (Rad+ 2016, J/A+A/585/A23) (tables 1 and 3))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/849/139/regions?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/849/139/regions?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/849/139/regions?GETtext/xml+votable180.050000true281.8942083-1.21188890.0055555555555555566/29097 30269 30318https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/849/139?format=asciiRadiodefaultJ/ApJ/849/139/regionsObservational parameters and beam-averaged and source-averaged fit results of acetone lines using the GOBASIC program (Rad+ 2016, J/A+A/585/A23) (tables 1 and 3)NTSource-averaged column densitycm**-2phys.columnDensitydoublee_NT1{sigma} uncertainty on NTcm**-2stat.errordoubleFWHMSource-averaged line widthkm/sspect.line.widthfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource namemeta.id;meta.maincharDateFirst UT date of observationtime.epoch;obsnullableDay2Last day of observationdtime.epochintRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainVlsr[58/97] Local standard of rest velocitykm/sphys.veloc;pos.lsrfloatTsys1[175/196] Lower range of telescope system temperatureKphys.temperatureintTsys2[265/344] Upper range of telescope system temperatureKphys.temperatureinttau1[0.04/0.06] Lower range of atmospheric optical at 225GHzmeta.notefloattau2[0.08/0.2] Upper range of atmospheric optical at 225GHz {tau}meta.notefloatNNumber of transitions included in the fitmeta.numberintEupState energy E_up_/kKphys.energy;phys.atmol.levelchartau-b[0.001/0.005] Beam-averaged maximum acetone optical depth ({tau}_max_)phys.absorption.opticalDepth;stat.maxfloatNT-bBeam-averaged column densitycm**-2phys.columnDensitydoublee_NT-b1{sigma} uncertainty on NT-bcm**-2stat.errordoubleTrot-b[62/137] Beam-averaged rotational temperatureKphys.temperatureinte_Trot-b1{sigma} uncertainty on Trot-bKstat.errorintFWHM-bBeam-averaged line widthkm/sspect.line.widthfloate_FWHM-b1{sigma} uncertainty on FWHM-bkm/sstat.errorfloatf_FWHM-ba: The FWHM was fixed to 10.0km/smeta.codechardVel-bBeam-averaged velocity shift relative to the Vlsr and assumed source size {theta}km/sphys.veloc;arith.difffloate_dVel-b1{sigma} uncertainty on dVel-bkm/sstat.errorfloatthetaSource size {theta}arcsecphys.angSizecharf_thetaFlag on {theta} (1)meta.codechartau[0.02/1.2] Source-averaged maximum acetone optical depth ({tau}_max_)phys.absorption.opticalDepth;stat.maxfloatTrot[49/132] Source-averaged rotational temperatureKphys.temperatureinte_Trot1{sigma} uncertainty on TrotKstat.errorinte_FWHM1{sigma} uncertainty on FWHMkm/sstat.error;phys.angSizefloatf_FWHMa: The FWHM was fixed to 10.0km/smeta.codechardVelSource-averaged velocity shift relative to the Vlsr and assumed source size {theta}km/sphys.veloc;arith.difffloate_dVel1{sigma} uncertainty on dVelkm/sstat.errorfloatLinesDisplay the brightest acetone lines observed for this region (link to table 4)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/ApJ/849/139/table4Brightest acetone lines observed in these sourcesParTransition parity labelmeta.id;phys.atmol.parity;phys.atmol.transitioncharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFreq[220352.5/265017.3] Catalog frequencyMHzem.freqdoubleGAL31.41[220352.3/265017] GAL 31.41+0.31 line center frequencyMHzem.freq;spect.linedoubleGAL034.3[220351.7/265016.3] GAL 034.3+00.2 line center frequencyMHzem.freq;spect.linedoubleGAL10.47[220353.2/265018.1] GAL 10.47+00.03 line center frequencyMHzem.freq;spect.linedoubleEup[40.3/600.3] Upper state energyKphys.energy;phys.atmol.leveldoubleTNumTransition quantum numbers in the format J"_Ka",Kc"_-J'_Ka',Kc'_.instr.det.qe;phys.atmol.transition