J/AJ/169/12ivo://CDS.VizieR/J/AJ/169/12doi:10.26093/cds/vizier/be-59-cCDSQiao H.-H.Ouyang X.-J.Shen Z.-Q.Breen S.L.Yang K.Chen XiLi J.2026-07-02T11:45:20Z2025-10-21T15:09:02ZCDS support team

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

cds-question@unistra.frastrophysical-masersradio-astronomystar-forming-regionspolarimetryinterstellar-mediumradio-sourcesWe present a 6.0GHz excited-state OH maser survey toward 155 northern star formation regions utilizing the Shanghai Tianma Radio Telescope. In total, we detect 44 6.0GHz OH masers, 8 of which are new detections (one at 6016MHz, two at 6030MHz, and five at 6035MHz). Of these 44 detected 6.0GHz OH masers, 13 sites exhibit 6030MHz OH masers, all 44 sites show the 6035MHz transition, one site (G009.620+0.194) has the only 6016MHz OH maser, and one site (W3(OH)) shows the only 6049MHz OH maser. The 6016MHz OH maser is the first OH maser of this transition detected in star formation regions. Investigations of the association between 6030/6035MHz OH masers with 1665MHz ground-state OH, 6.7GHz methanol, and 22GHz water masers show that 1665MHz OH masers are good indicators of 6.0GHz OH masers (29% detection rate), which is consistent with previous results. The majority (more than 77%) of 6030 and 6035MHz OH masers are associated with 6.7GHz methanol and/or 22GHz water masers. Comparison between our spectra with previous spectra, we find that only two sources remain fairly stable since their discoveries. We identify 80 Zeeman pairs in 32 6.0GHz OH maser sites with typical magnetic field strengths of less than 10mG. The magnetic field directions derived from these 32 maser sites with Zeeman pairs are consistent with previous work, which indicates that the 6.0GHz OH masers may be potential tracers of the large-scale Galactic magnetic field.2025AJ....169...12Qhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/169/12CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/96 : 6-GHz methanol multibeam maser catalogue (Caswell+, 2010-12)J/A+AS/101/153 : Galactic H2O masers (Palagi+ 1993)J/A+AS/120/283 : H2O maser features in ultracompact HII regions (Hofner+, 1996)J/A+A/325/255 : 5cm OH masers survey (Baudry+ 1997)J/A+AS/143/269 : 6.7GHz methanol maser emission survey (Szymczak+, 2000)J/A+A/414/235 : OH maser emission from star forming regions (Szymczak+, 2004)J/A+A/434/613 : Water maser survey of methanol maser sources (Szymczak+, 2005)J/ApJ/668/331 : OH masers in W3(OH) (Fish+, 2007)J/other/PASA/26.454 : Precise positions of methanol masers (Caswell, 2009)J/MNRAS/416/1764 : H_2_O Southern Galactic Plane Survey (HOPS) (Walsh+, 2011)J/MNRAS/442/2240 : Accurate water maser positions from HOPS (Walsh+, 2014)J/MNRAS/451/74 : Excited-state hydroxyl maser polarimetry (Green+, 2015)J/MNRAS/461/136 : MMB Survey ex-OH catalogue (Avison+, 2016)J/A+A/642/A145 : OH 6035MHz line in high-mass SFRs (Szymczak+, 2020)J/ApJ/928/129 : 4.7GHz OH masers in north. star formation regions (Qiao+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/169/12https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/169/12http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/169/12https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/169/12https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/169/12http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/169/12GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/169/12/table1 (Star formation regions showing 6.0GHz OH emission)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/169/12/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/169/12/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/169/12/table1?GETtext/xml+votable180.050000true266.8333333-28.37777780.0055555555555555566/3649 14317 14594 14624 14671 14704 15452 21439 28827 28830 28891 28912 28919 29091 29096-29097 29100-29101 29116 29511 29535 30218-30219 30256 30312 30318-30319 30405 30420 30618 30622 30644 30694 39895https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/169/12?format=asciiRadiodefaultJ/AJ/169/12/table1Star formation regions showing 6.0GHz OH emissionNameName of source in galactic coordinates (GLLL.lll+BB.bbb)meta.id;meta.maincharprimarySimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFreq[6016/6049] Frequency of the OH transitionem.freq;phys.atmol.transitionintEpochObservation date'Y:M:D'time.epochnullableVmin[-63/112] Lower limit of the velocity range of the OH emissionkm/sphys.veloc;phys.emissMeasure;stat.minfloatVmax[-62/114] Upper limit of the velocity range of the OH emissionkm/sphys.veloc;phys.emissMeasure;stat.maxfloatVp[-62/114] Peak velocity of the maser emission at the brightest channelkm/sphys.veloc;pos.lsrfloatSp[0.2/146] Peak flux density (flux density of the brightest channel)Jyphot.flux.density;em.radio.6-12GHzfloatSpLHC[0/149] Peak flux densities at peak of the LHC polarization spectrumJyphot.flux.density;em.radio.6-12GHz;phys.polarization.circularfloatSiLHC[0/76] Integrated flux density at peak of the LHC polarization spectrumJy.km/sphot.flux.density;em.radio.6-12GHz;phys.polarization.circularfloatVpLHC[-62/102] Velocity at peak of the LHC polarization spectrumkm/sphys.veloc;phys.emissMeasure;phys.polarization.circularfloatSpRHC[0.1/139] Peak flux densities at peak of the LHC polarization spectrumJyphot.flux.density;em.radio.6-12GHz;phys.polarization.circularfloatSiRHC[0.1/81] Integrated flux density at peak of the LHC polarization spectrumJy.km/sphot.flux.density;em.radio.6-12GHz;phys.polarization.circularfloatVpRHC[-62/113] Velocity at peak of the LHC polarization spectrumkm/sphys.veloc;phys.emissMeasure;phys.polarization.circularfloatAliasAlias of the masermeta.idcharRefOHReference of the OH maser emission (1)meta.refcharRefCH3OHReference for methanol (CH_3_OH) maser detection toward this source (2)meta.refcharRefH2OReference for water (H_2_O) maser detection toward this source (2)meta.refchar_RAPositions from Simbad (right ascension part)degpos.eq.ra;meta.main_DEPositions from Simbad (declination part)degpos.eq.dec;meta.mainJ/AJ/169/12/table2Fitted line parameters of the 6.0GHz OH emissionSp[0.1/117] Peak flux density of the fitted spectral featureJyphot.flux.density;em.radio.6-12GHz;meta.modelledfloatsigma[0.03/0.2]? 1{sigma} noise level of each spectrum obtained from the Gaussian fittingJyinstr.det.noisefloatnullableNameName of source in galactic coordinates (GLLL.lll+BB.bbb)meta.id;meta.maincharprimaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFreq[6016/6049] Frequency of the OH transitionMHzem.freq;phys.atmol.transitionintVelLSR[-63/114] Peak velocity of the fitted spectral componentkm/sphys.veloc;pos.lsrfloate_VelLSR[0/0.14] Uncertainty in LSRVelkm/sstat.error;phys.veloc;pos.lsrfloatFWHM[0.1/7] Full width at half maximum (FWHM) line widthkm/sspect.line.widthfloate_FWHM[0/0.5] Uncertainty in DeltaVkm/sstat.error;spect.line.widthfloatSint[0.03/60.2] Integrated flux density of the fitted spectral featureJy.km/sphot.flux.density;em.radio.6-12GHz;meta.modelledfloate_Sint[0.01/2.3] Uncertainty in SintJy.km/sstat.error;phot.flux.density;meta.modelledfloat