J/ApJS/266/29ivo://CDS.VizieR/J/ApJS/266/29doi:10.26093/cds/vizier.22660029CDSZhao J.Y.Zhang J.S.Wang Y.X.Qiu J.J.Yan Y.T.Yu H.Z.Chen J.L.,Zou Y.P.2025-05-22T20:14:01Z2023-09-19T10:24:36ZCDS support team

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

cds-question@unistra.frstar-forming-regionsradio-spectroscopyastrophysical-masersradio-astronomymolecular-physicschemical-abundancesinterstellar-mediumWe carried out a spectral line survey of CH3OH toward a large sample of 175 high-mass star-forming regions in the 3mm, 2mm, and 1.3mm bands with the Institut de Radioastronomie Millimetrique (IRAM) 30m telescope. Out of our 175 targets, 148 sources were detected with one or more CH_3_OH transition lines. Nineteen CH_3_OH transition lines, including 13 thermal lines and 6 maser lines, were detected. The 8_0_->7_1_ A^+^ (~95.169GHz) CH_3_OH maser line, one of the strongest class I CH_3_OH maser lines, was detected in 52 sources. Forty-two of them are previously reported masers and the other 10 are new detections. Through analyzing the rotational diagram of the detected CH3OH emission lines (nonmasing lines), we obtained the rotational temperature and the column density for 111 sources. Our results show that E-type CH_3_OH tends to have lower column density than A-type CH_3_OH. The column density ratio of E/A was derived in 55 sources with the majority having a ratio less than 1.0 (about 70%), with a peak ratio of ~0.6. This is consistent with theoretical predictions, i.e., overabundance of A-type CH_3_OH at low temperature leading to a low E/A ratio. Furthermore, we found that CH3OH abundance decreases beyond T_dust_~30K, which is supported by modeling results. All these support the fact that CH3OH is easily formed at low-temperature environments, via successive hydrogenation of CO on cold dust surfaces.2023ApJS..266...29Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/266/29CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/96 : 6-GHz methanol multibeam maser catalogue (Caswell+, 2010-12)J/A+AS/80/149 : IRAS Sources behind the Solar circle (Wouterloot+ 1989)J/A+A/308/573 : Ammonia on YSOs IRAS sources (Molinari+ 1996)J/A+AS/133/29 : Molecular line survey towards UC HII (Hatchell+ 1998)J/ApJS/125/161 : A database of dense cores mapped in ammonia (Jijina+, 1999)J/ApJS/155/149 : CH_3_OH 7_0_-6_1_ A^+^ maser sources (Kurtz+, 2004)J/ApJ/702/1615 : CH_3_OH maser survey of EGOs (Cyganowski+, 2009)J/ApJS/196/9 : 95GHz maser survey toward GLIMPSE EGOs (Chen+, 2011)J/A+A/529/A161 : IRDC core G11.11-0.12P1 methanol maps (Gomez+, 2011)J/MNRAS/418/1689 : Red MSX water maser and ammonia emissions (Urquhart+, 2011)J/ApJS/202/1 : 1mm spectral line survey toward GLIMPSE EGOs (He+, 2012)J/other/ChA+A/36.238 : Outflows toward massive cores (Sun+, 2012)J/ApJS/206/9 : New EGOs from Spitzer GLIMPSE II survey. I. (Chen+, 2013)J/A+A/560/A73 : Horsehead H2CO and CH3OH 30m and PdBI maps (Guzman+, 2013)J/A+A/563/A97 : IRAM 30m reduced spectra of 59 sources (Gerner+, 2014)J/ApJ/783/130 : Parallaxes of high mass star forming regions (Reid+, 2014)J/MNRAS/452/637 : Distance-limited sample of MYSOs (Maud+, 2015)J/MNRAS/452/4029 : RMS survey (Urquhart+, 2015)J/MNRAS/471/100 : Hi-GAL compact source catalog. -71.0<l<67.0 (Elia+, 2017)J/A+A/599/A139 : ATLASGAL massive clumps dust (Koenig+, 2017)J/A+A/598/A59 : G31.41+0.31 SMA spectra (Rivilla+, 2017)J/ApJ/845/116 : Mapping sp. line survey toward W51 in 3mm (Watanabe+, 2017)J/ApJS/231/20 : A new 95GHz methanol maser catalog. I. (Yang+, 2017)J/ApJ/846/160 : 6.7GHz Class II methanol maser survey (Yang+, 2017)J/A+A/611/A6 : ATLASGAL massive clumps H_2_CO data (Tang+, 2018)J/MNRAS/473/1059 : Complete sample of Gal. clump properties (Urquhart+, 2018)J/ApJ/885/131 : ~200 high-mass SFR plx & PMs with VLBI (Reid+, 2019)J/ApJ/877/154 : H_2_CO TMRT obs. of Galactic molecular clouds (Yan+, 2019)J/ApJS/241/18 : A 6.7GHz methanol maser survey. II. |b|<2{deg} (Yang+, 2019)J/ApJS/248/18 : 44 and 95GHz obs. of class I methanol masers (Yang+, 2020)J/ApJS/263/9 : Maser transitions from G358.93-0.03 burst (Miao+, 2022)J/ApJS/258/19 : 12.2GHz methanol survey toward 6.7GHz masers (Song+, 2022)J/MNRAS/510/3389 : High-mass star formation evol. trends (Urquhart+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/266/29https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/266/29http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/266/29https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/266/29https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/266/29http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/266/29GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/266/29/table3 (Information on detected CH_3_OH transition lines)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/266/29/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/266/29/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/266/29/table3?GETtext/xml+votable180.050000true16.9612565.35594440.0055555555555555565/7383 6/1335 1340 1470 1960 1962 3292 3308 3311 3320 3338 3649 3730 3732 14267 14314 14317 14353-14356 14594 14604 14618 14625-14626 14640 14643 14655 14689 14704 15385-15386 15390 15408 15425 15455 15458 15462 15464 15473 15477 15624 15627 15642 15667-15668 15671 15673 15676 15681 15720 15759 15817 21439 23764 24362 28811 28825 28827 28830-28831 28875 28912-28913 28917-28919 29091-29092 29096-29097 29100-29101 29103 29113-29114 29118 29154 29160 29461 29504 29510 29513 29529 30218 30245 30256 30258-30259 30262-30263 30268-30269 30312-30313 30315 30317-30319 30330 30405 30416 30420 30425 30595 30600-30601 30604 30616-30618 30622 30644 30691-30692 30694 30715 30719https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/266/29?format=asciiMillimeterRadiodefaultJ/ApJS/266/29/table3Information on detected CH_3_OH transition linesNameSource namemeta.id;meta.maincharprimaryCNameATLASGAL catalog source name (1)meta.id.assoccharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainDGC[0/22.7] Galactocentric distancekpcpos.distance;pos.galactocentricfloatNl[0/19] Number of methanol linesmeta.numberintNpNumber of line parameter measurements (link to Table 4)meta.numberintnullableDetMaser detection (2)meta.notecharAEDisplay parameters of A-type and E-type CH_3_OH (link to Table 8)meta.ref.urlintnullableSimbadNameSimbad column added by the CDSmeta.idcharnullableJ/ApJS/266/29/table4Measured CH_3_OH spectra line parameters toward our by the IRAM 30mNameSource namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFreq[94541.79/220078.56]? Transition line frequency (1)MHzem.freq;spect.line;phys.atmol.transitiondoublenullableRMS[0.01/0.5]? Root mean square in Tmb (1)Kstat.stdev;stat.meanfloatnullableInt[0.04/84.2]? Integrated line intensity (1)K.km/sphot.flux.densityfloatnullablee_Int[0.0/4.2]? Uncertainty in Int (1)K.km/sstat.errorfloatnullableVLSR[-93/127.1]? Local standard of rest velocity (1)km/sphys.veloc;pos.lsrfloatnullablee_VLSR[0/1.2]? Uncertainty in VLSR (1)km/sstat.error;phys.veloc;pos.lsrfloatnullableDelV[0.7/22.6]? Line Full-Width at Half-Maximum (1)km/sspect.line.widthfloatnullablee_DelV[0/6.5]? Uncertainty in DelV (1)km/sstat.errorfloatnullableTmb[0.03/8]? Main beam temperature (1)Kphys.temperature;meta.mainfloatnullableJ/ApJS/266/29/table8Measured parameters of A-type and E-type CH_3_OHNameSource namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTRot-E[4.5/255]? CH3OH E-type rotational temperatureKphys.temperature;phys.mol.rotationfloatnullablee_TRot-E[0.07/74]? Uncertainty in TRot-EKstat.errorfloatnullableN-E[0.3/239]? CH3OH E-type column density1e+14cm**-2phys.columnDensityfloatnullablee_N-E[0.05/20]? Uncertainty in N-E1e+14cm**-2stat.errorfloatnullableX-E[2/91]? CH3OH E-type relative abundancephys.abundfloatnullablee_X-E[0.1/134]? Uncertainty in X-Estat.errorfloatnullableTRot-A[0.03/58]? CH3OH A-type rotational temperatureKphys.temperature;phys.mol.rotationfloatnullablee_TRot-A[0.04/120]? Uncertainty in TRot-AKstat.errorfloatnullableN-A[0.1/103]? CH3OH A-type column density1e+14cm**-2phys.columnDensityfloatnullablee_N-A[0.08/14]? Uncertainty in N-A1e+14cm**-2stat.errorfloatnullableX-A[0.18/95]? CH3OH A-type relative abundancephys.abundfloatnullablee_X-A[0.09/12]? Uncertainty in X-Astat.errorfloatnullableE/A[0.2/6.1]? Density ratio between E and A typesphys.density;arith.ratiofloatnullable