J/A+A/642/A145ivo://CDS.VizieR/J/A+A/642/A145doi:10.26093/cds/vizier.36420145CDSSzymczak M.Wolak P.Bartkiewicz A.Aramowicz M.Durjasz M.2021-07-05T07:28:37Z2021-02-10T13:54:29ZCDS support team

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

cds-question@unistra.frastrophysical-masersradio-astronomyThe excited states of OH masers detected in the environment of high-mass young stellar objects (HMYSOs) are important for improving our understanding of the physical conditions of these objects and also provide information about their magnetic fields. We aim to search for excited-state OH 6035MHz maser emission in HMYSOs which might have escaped detection in previous surveys or were never searched for. Methods. A sample of HMYSOs derived from untargeted surveys of the 6668MHz methanol maser line was observed at 6035MHz OH transition with the Torun 32m radio telescope. The 6035MHz detections were observed in the OH 6031MHz line. Two-thirds of the detections were observed at least three times over a two-year period. Out of 445 targets, 37 were detected at 6035MHz, including seven new discoveries. The 6031MHz line was detected towards ten 6035MHz sources, one of which was not previously reported. All the newly detected sources are faint with the peak flux density lower than 4Jy and show significant or high variability on timescales of 4 to 20 months. Zeeman pair candidates identified in three new sources imply a magnetic field intensity of 2-11mG. Comparison of our spectra with those obtained ~10yr ago indicates different degrees of variability but there is a general increase in the variability index on an ~25yr timescale, usually accompanied by significant changes in the profile shape.2020A&A...642A.145Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/642/A145CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/325/255 : 5cm OH masers survey (Baudry+ 1997)J/MNRAS/451/74 : Excited-state hydroxyl maser polarimetry (Green+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/642/A145https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/642/A145http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/642/A145https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/642/A145https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/642/A145http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/642/A145GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/642/A145/tablea1 (Properties of 6035 and 6031MHz OH maser emission for previously known sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/642/A145/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/642/A145/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/642/A145/tablea1?GETtext/xml+votable180.050000true272.3470833-20.135250.005555555555555556Cone search capability for table J/A+A/642/A145/tablea2 (Non-detections)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/642/A145/tablea2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/642/A145/tablea2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/642/A145/tablea2?GETtext/xml+votable180.050000true271.1500833-21.80544440.0055555555555555565/7278 7377 7383 7564 7578-7579 7654 6/3011 3061 3303 3306 12974 14063 14304 14309 14317 14341 14353-14356 14594 14604 14622 14626 14630 14655 14671 14689 14692 14704 15452 15473 15671 15676 15681 21439 21458 21510 22122 22855 23764 23969 23982 24320 24325 24507 24554 28918-28919 29090-29092 29094 29096-29097 29100-29101 29103 29116 29118-29119 29154 29160 29461 29463 29504-29505 29507 29513 29522 29529 30218-30219 30222 30241 30243-30245 30262-30263 30268-30269 30328 30330 30405 30416-30417 30419-30420 30422-30423 30425 30594-30595 30600-30601 30604-30606 30622 30644-30645 30692 30694-30695 30701 30710 30712 30714-30716 30718-307193.996182648847979e-24 3.996182648847979e-24https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/642/A145?format=asciiRadiodefaultJ/A+A/642/A145/table2Variability indices of 6035MHz emission for the main feature on timescales of 2 (vi2), 10 (vi10), and 25 (vi25) yearsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource name (GLLL.lll+BB.bbb)meta.id;meta.maincharn_SourceNote on Source (1)meta.notecharvi2Variability indices of 6035MHz emission for the main feature on timescales of 2 yearssrc.var.indexfloatvi10? Variability indices of 6035MHz emission for the main feature on timescales of 10 yearssrc.var.indexfloatnullablevi25? Variability indices of 6035MHz emission for the main feature on timescales of 25 yearssrc.var.indexfloatnullableJ/A+A/642/A145/tablea1Properties of 6035 and 6031MHz OH maser emission for previously known sourcesSpLHC2? 6031MHz LHC peak flux densityJyphot.flux.density;em.radio.3-6GHzfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource name (GLLL.lll+BB.bbb)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainDV1a6035MHz lower value of velocity range of I Stokes emissionkm/sinstr.bandwidthfloatDV1b6035MHz upper value of velocity range of I Stokes emissionkm/sinstr.bandwidthfloatVpLHC1? 6035MHz LHC peak velocitykm/sspect.dopplerVelocfloatnullableSpLHC1? 6035MHz LHC peak flux densityJyphot.flux.density;em.radio.3-6GHzfloatnullableSiLHC16035MHz LHC integrated flux densityJy.km/sphot.flux.density;em.radio.3-6GHzfloatVpRHC16035MHz RHC peak velocitykm/sspect.dopplerVelocfloatSpRHC16035MHz RHC peak flux densityJyphot.flux.density;em.radio.3-6GHzfloatSiRHC16035MHz RHC integrated flux densityJy.km/sphot.flux.density;em.radio.3-6GHzfloatDV2a? 6031MHz lower value of velocity range of I Stokes emissionkm/sinstr.bandwidthfloatnullableDV2b? 6031MHz upper value of velocity range of I Stokes emissionkm/sinstr.bandwidthfloatnullableVpLHC2? 6031MHz LHC peak velocitykm/sspect.dopplerVelocfloatnullableSiLHC2? 6031MHz LHC integrated flux densityJy.km/sphot.flux.density;em.radio.3-6GHzfloatnullableVpRHC2? 6031MHz RHC peak velocitykm/sspect.dopplerVelocfloatnullableSpRHC2? 6031MHz RHC peak flux densityJyphot.flux.density;em.radio.3-6GHzfloatnullableSiRHC2? 6031MHz RHC integrated flux densityJy.km/sphot.flux.density;em.radio.3-6GHzfloatnullableJ/A+A/642/A145/tablea2Non-detectionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource name (GLLL.lll+BB.bbb)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVc(6668)Central velocity of observationkm/sphys.veloc;obsfloatRef? Reference of detection for previously known sources (1)meta.refintnullableJ/A+A/642/A145/tablea36035 and 6031MHz OH Zeeman pair candidates identified in the present samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource name (GLLL.lll+BB.bbb)meta.id;meta.maincharVfLHCLHC peak velocity (1)km/sspect.dopplerVelocfloatSfLHCLHC peak flux density (1)Jyphot.flux.density;em.radio.3-6GHzfloatVfRHCRHC peak velocity (1)km/sspect.dopplerVelocfloatSfRHCRHC peak flux density (1)Jyphot.flux.density;em.radio.3-6GHzfloatVdDemagnetized velocitykm/sphys.velocfloatn_Vd[a] a: 6031MHz transition, else 6035MHz transitionmeta.notecharBMagnetic field strengthGphys.atmol.collStrength;obs.fieldfloatRel[A/B] Reliability parameter (2)meta.codecharl_B1Limit flag on B1meta.code.errorcharB1? Estimate of the magnetic field strength from the literatureGphys.magFieldfloatnullabler_B1? Reference for B1 (3)meta.ref;pos.frameintnullableB2? Estimate of the magnetic field strength from the literatureGphys.magFieldfloatnullabler_B2? Reference for B2 (3)meta.ref;pos.frameintnullableB3? Estimate of the magnetic field strength from the literatureGphys.magFieldfloatnullabler_B3? Reference for B3 (3)meta.ref;pos.frameintnullable