J/MNRAS/461/136ivo://CDS.VizieR/J/MNRAS/461/136CDSAvison A.Quinn L.J.Fuller G.A.Caswell J.L.Green J.A.Breen S.L.,Ellingsen S.P.Gray M.D.Pestalozzi M.Thompson M.A.Voronkov M.A.2023-11-16T08:06:16Z2023-11-16T09:05:48ZCDS support team

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

cds-question@unistra.frgalaxy-planesmilky-way-galaxyastrophysical-masersradio-astronomyradio-sourcesWe present the results of the first complete unbiased survey of the Galactic plane for 6035-MHz excited-state hydroxyl (ex-OH) masers undertaken as part of the methanol multibeam (MMB) survey. These observations cover the Galactic longitude ranges 186deg<l<60deg including the Galactic Centre. We report the detection of 127 ex-OH masers within the survey region, 47 being new sources. The positions of new detections were determined from interferometric observations with the Australia Telescope Compact Array. We discuss the association of 6035-MHz masers in our survey with the 6668-MHz masers from the MMB Survey, finding 37 likely CH_3_OH-ex-OH maser pairs with physical separations of <=0.03pc and 55 pairings separated by <=0.1pc. Using these we calculate for the first time an ex-OH maser lifetime of between 3.3x10^3^ and 8.3x10^3^yr. We also discuss the variability of the 6035-MHz masers and detection rates of counterpart 6030-MHz ex-OH masers (28 per cent of our sample having detection at both frequencies).2016MNRAS.461..136Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/461/136CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/461/136https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/461/136http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/461/136https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/461/136https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/461/136http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/461/136GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/461/136/table1 (MMB Survey ex-OH catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/461/136/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/461/136/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/461/136/table1?GETtext/xml+votable180.050000true266.82766667-28.381833330.0055555555555555566/24325 28808-28809 28824 28827 28830 28901 28912 28915 28918-28919 29091 29096-29097 29100-29101 29116 29505 29508 29510-29511 29535 30219 30241 30256 30258 30263 30312 30318-30319 30328 30405 30595 30600 30618 30644 30694 30701 30714 37343 37897 39895 41655 41673 41676-41677 41681 41684 41780 41804 41809 41813 42159 42169-42170 42172 42207 42213 42215 42224 42226 42228-42230 42378 42382 42390-42393 42396-42398 42417 42436 42441 42445 42450-42451 42455-42456 42496-42498 43019 43021https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/461/136?format=asciiRadiodefaultJ/MNRAS/461/136/table1MMB Survey ex-OH cataloguerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMMBOHName (LLL.lll+BB.bbbA) for MMBOH-LLL.lll+BB.bbbA (1)meta.id;meta.maincharRAJ2000Right ascension (J2000) (2)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainTrans[6030 6035] Transition (3)MHzem.freqintr_PosPosition reference (4)meta.ref;pos.framecharSpeak? MX/(ATCA) or LHPC(Stokes (I)) peak flux density in Trans frequencyJyphot.flux.density;em.radiofloatnullableVpeak? MX/(ATCA) or LHPC(Stokes (I)) peak velocity in Trans frequencykm/sspect.dopplerVelocfloatnullablen_Speak[i] i for Speak and Vpeak of LHPC(Stokes (I)) (5)meta.notecharb_Vpeak? Lower value of Vpeak velocity range (6)km/sphys.veloc;instr.bandwidth;stat.minfloatnullableB_Vpeak? Upper value of Vpeak velocity range (6)km/sphys.veloc;instr.bandwidth;stat.maxfloatnullablen_Vpeak[*] Note on Vpeak (7)meta.notecharSpeak2? MX RHCP peak flux density in Trans frequencyJyphot.flux.density;em.radiofloatnullableVpeak2? MX RHCP peak velocity in Trans frequencykm/sspect.dopplerVelocfloatnullableb_Vpeak2? Lower value of Vpeak2 velocity range (6)km/sphys.veloc;instr.bandwidth;stat.minfloatnullableB_Vpeak2? Upper value of Vpeak2 velocity range (6)km/sphys.veloc;instr.bandwidth;stat.maxfloatnullable