J/MNRAS/276/57ivo://CDS.VizieR/J/MNRAS/276/57doi:10.26093/cds/vizier.72760057CDSCodella C.Palumbo G.G.C.Pareschi G.Scappini F.,Caselli P.Attolini M.R.2024-06-25T20:17:28Z1997-12-09T21:41:19ZCDS support team

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

cds-question@unistra.frastrophysical-masersradio-astronomyinfrared-sourcesspectroscopyThe results of the analysis of the occurrence of 22.2-GHz H_2_O maser emission in a sample of 1409 IRAS sources north of declination -30deg associated with star-forming regions are presented. Our sample contains all the IRAS sources that satisfy Emerson criteria for selecting molecular cores associated with the earliest evolutionary stages of the star-forming process. In a previous paper (Paper I, 1994MNRAS.266..123P), we have reported the results of the observations of about one third of the sample. In the present paper the observations of the remaining IRAS sources are presented: 18 of them are newly detected maser sources. The results show that 20 per cent of all IRAS sources that satisfy the Wood & Churchwell criteria have H2O water masers. This is in agreement with the assumption that these criteria select objects that are connected with the early phases of the evolution of high-mass star-forming regions. Moreover, about one third of the whole sample selected according to Emerson criteria contains IRAS sources that are not associated with massive star-forming processes, but probably with molecular cores in low-mass star-forming regions.1995MNRAS.276...57Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/276/57CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)J/A+AS/98/589 : IRAS Sources behind the Solar circle (Wouterloot+ 1993)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/276/57https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/276/57http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/276/57https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/276/57https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/276/57http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/276/57GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/276/57/table1 (Subsample A)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/276/57/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/276/57/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/276/57/table1?GETtext/xml+votable180.050000true11.7651-11.86280.005555555555555556Cone search capability for table J/MNRAS/276/57/table2 (Subsample B)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/276/57/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/276/57/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/276/57/table2?GETtext/xml+votable180.050000true25.757213.65310.005555555555555556Cone search capability for table J/MNRAS/276/57/table3 (Subsample C)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/276/57/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/276/57/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/276/57/table3?GETtext/xml+votable180.050000true4.096161.33610.0055555555555555565/5560 7207 7228 7273 7278 7376-7377 7383 7564 7579 7651 7673 6/238 295 336 463 474 735 1038 1074 1082 1114 1128 1264 1276 1295 1299-1300 1336 1344 1354 1376 1460 1544 1622 1635 1653 1677 1736 1759 1778 1781 1789 1793 1831 1834-1835 1927-1929 1936 1960 2155 2903 2948 2973 3009 3037 3047 3052 3057 3061 3063 3067 3157 3173 3184 3267 3269 3281 3283 3307 3310 3312 3320 3326 3336-3337 3364 3383 3516 3604 3614 3648-3649 3652 3656 3735 3746-3747 3755-3756 3777 3848 3852 3878 3884 4619 5995 6046 6376 7132 7234 7878 7986 8126 8562 10628 10905 12122 12970 12989-12991 13041 13051 13191 13734 13925 14164 14191 14221 14263 14266-14267 14269 14279 14284 14286-14288 14298 14300 14307-14308 14316-14317 14323 14330-14331 14339-14340 14356 14358-14359 14361 14365 14367 14370 14402-14403 14409 14419 14431 14435 14437 14453 14600 14610 14618 14620 14627 14631 14633 14641-14642 14645-14646 14649 14657-14658 14660 14666 14668-14669 14687 14689 14692-14693 14695 14709 14711 15161 15377 15395 15397 15409 15411 15415 15421-15423 15431 15434-15435 15449 15451-15452 15455-15458 15462 15472-15474 15477 15479 15484 15505 15541 15558 15570 15608 15626-15627 15629 15633 15637 15642 15668 15670 15684 15699-15700 15716 15719-15720 15724 15778 15790 15816 15857 15941 15955 16191 16470 16479 16655 16694 16755 16886 17252 18387 18432 18714 19283 20000 20177 20805 20829 20831 20843 20849 20859 21298 21303 21329 21340 21353-21354 21400 21402 21425 21430 21436 21438-21439 21445-21446 21457-21458 21465 21510 21518-21519 21523 21530 21552 21632 21637 21639 21641-21643 21645-21647 21657 21667 21669 21677 21679 21689 22038 22040 22044 22070 22075 22113 22122 22124 22197 22205 22208 22212 22214 22216-22218 22226 22246 22249 22258 22455 22804 22807 22829 22854-22855 22860-22861 22873 22875-22876 22887 23451 23562 23637 23639 23644-23646 23669 23672 23697 23714 23764 23767 23769 23944 23962 23969 23976 23980 23987 23996-23997 24158 24183 24340 24355 24361 24448 24454 24457 24475 24501 24510-24511 24555 24735 24866 25136 25344 25714 26580 26740 27728 27937 28784 28826-28827 28839 28874-28875 28878 28885 28890 28894 28896-28897 28900-28901 28903 28917-28920 28925 29070 29090-29091 29096-29097 29100-29101 29103 29116 29118-29119 29131 29158 29162 29174 29182 29193 29198 29245 29253 29274 29276 29367 29439-29441 29448 29457 29461 29463-29464 29513 29515 29517-29518 29522-29523 29526-29529 29556 29654 29718 30209 30217-30219 30222 30234 30240-30241 30243-30245 30247 30253 30260 30262-30263 30266-30269 30276 30313 30315 30328 30330 30341 30343 30353 30359 30363 30383 30387 30402-30403 30405 30416-30417 30419-30420 30422-30423 30429 30506 30511 30592 30594 30598-30602 30613 30616 30618-30619 30622-30624 30628 30641 30644-30645 30688 30691 30700 30706 30715 30719 30733 30810 30822 30824 32084-32085 35691 36081 36194 36240 38821 38868 38887 39774 39803-39804 39806 39831 39862 39899 39911 39916 39919 39926 39929 39932-39934 40106 40189 40410 40472 40483 40537 40579 40609 40612 40617-40619 40738 42923 42948 42970 42977 42981-42982 43881 43925 44236 44360 44375 44812 48502 48738 48808 488111.9864425968556103e-21 1.6553710307751707e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/276/57?format=asciiOpticalInfraredRadiodefaultJ/MNRAS/276/57/table1Subsample ArecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRASIRAS namemeta.id;meta.maincharm_IRASMultilpicity index on IRAS namemeta.code.multipcharGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latl_FpeakLimit flag on Fpeakmeta.code.errorcharFpeak? Peak flux densityJyphot.flux.density;em.radio.12-30GHzfloatnullablen_Fpeak[ND ] Note on Fpeak (1)meta.notecharr_FpeakFpeak references (2)meta.ref;pos.frameint_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexedJ/MNRAS/276/57/table2Subsample BrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRASIRAS namemeta.id;meta.maincharm_IRASMultilpicity index on IRAS namemeta.code.multipcharGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latl_FpeakLimit flag on Fpeakmeta.code.errorcharFpeak? Peak flux densityJyphot.flux.density;em.radio.12-30GHzfloatnullablen_Fpeak[ND ] Note on Fpeak (1)meta.notecharr_FpeakFpeak references (2)meta.ref;pos.frameint_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexedJ/MNRAS/276/57/table3Subsample Cm_IRASMultilpicity index on IRAS namemeta.code.multipcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRASIRAS namemeta.id;meta.maincharGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latl_FpeakLimit flag on Fpeakmeta.code.errorcharFpeak? Peak flux densityJyphot.flux.density;em.radio.12-30GHzfloatnullablen_Fpeak[ND ] Note on Fpeak (1)meta.notecharr_FpeakFpeak references (2)meta.ref;pos.frameint_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexedJ/MNRAS/276/57/table5Derived parameters of the new maser sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRASIRAS namemeta.id;meta.maincharSample[ABC] Subsamplemeta.notecharl_F12Limit flag on F12meta.code.errorcharF12Flux density at 12{mu}mJyphot.flux.density;em.IR.8-15umdoublel_F25Limit flag on F25meta.code.errorcharF25Flux density at 25{mu}mJyphot.flux.density;em.IR.15-30umdoublel_F60Limit flag on F60meta.code.errorcharF60Flux density at 60{mu}mJyphot.flux.density;em.IR.30-60umdoublel_F100Limit flag on F100meta.code.errorcharF100Flux density at 100{mu}mJyphot.flux.density;em.IR.60-100umdoubleDateObserving datetime.epochnullableFpeakFlux of the strongest componentJyphot.flux.density;em.radio.12-30GHzfloatrmsNoise of the spectrumJystat.snr;phot.flux.densityfloatVpeakVelocity of the strongest componentkm/sphys.velocfloatFH2OIntegrated flux computed over the whole emission intervalJy.km/sphot.flux.density;meta.modelledfloat