J/A+A/626/A126ivo://CDS.VizieR/J/A+A/626/A126doi:10.26093/cds/vizier.36260126CDSAgliozzo C.Menher A.Phillips N. M.Leto P.Groh J.H.,Noriega-Crespo A.Buemi C.Cavallaro F.Cerrigone L.Ingallinera A.,Paladini R.Pignata G.Trigilio C.Umana G.2019-08-06T15:17:21Z2019-07-01T07:18:09ZCDS support team

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

cds-question@unistra.frvariable-starsmillimeter-astronomysubmillimeter-astronomyThe luminous blue variable (LBV) RMC143 is located in the outskirts of the 30~Doradus complex, a region rich with interstellar material and hot luminous stars. We report the 3{sigma} sub-millimetre detection of its circumstellar nebula with ALMA. The observed morphology in the sub-millimetre is different than previously observed with HST and ATCA in the optical and centimetre wavelength regimes. The spectral energy distribution (SED) of RMC suggests that two emission mechanisms contribute to the sub-mm emission: optically thin bremsstrahlung and dust. Both the extinction map and the SED are consistent with a dusty massive nebula with a dust mass of 0.055+/-0.018M_{sun}_ (assuming {kappa}_850_=1.7cm^2^/g). To date, RMC143 has the most dusty LBV nebula observed in the Magellanic Clouds. We have also re-examined the LBV classification of RMC143 based on VLT/X-shooter spectra obtained in 2015/16 and a review of the publication record. The radiative transfer code CMFGEN is used to derive its fundamental stellar parameters. We find an effective temperature of ~8500K, luminosity of log(L/L_{sun}_)=5.32, and a relatively high mass-loss rate of 1.0x10^-5^M_{sun}_/yr. The luminosity is much lower than previously thought, which implies that the current stellar mass of ~8M_{sun}_ is comparable to its nebular mass of ~5.5~M_{sun}_ (from an assumed gas-to-dust ratio of 100), suggesting that the star has lost a large fraction of its initial mass in past LBV eruptions or binary interactions. While the star may have been hotter in the past, it is currently not hot enough to ionize its circumstellar nebula. We propose that the nebula is ionized externally by the hot stars in the 30 Doradus star-forming region.2019A&A...626A.126Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/626/A126CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/626/A126https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/626/A126http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/626/A126https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/626/A126https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/626/A126http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/626/A126GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/626/A126/list (List of fits files)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/626/A126/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/626/A126/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/626/A126/list?GETtext/xml+votable180.050000true84.71517-69.135250.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/626/A1266/33094https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/626/A126?format=asciiMillimeterdefaultJ/A+A/626/A126/table1ALMA and ATCA maps properties and photometryl_FLimit flag on Fmeta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateSStart of date of observationstime.start;obsnullableDateEEnd of date of observationstime.end;obsnullableArrayInterferometermeta.notecharFreqCentral frequencyGHzem.freqfloatLASLAS in the final map (1)arcsecphys.atmol.final;obs.fieldfloatHPBW1Half Power Beam Width 1 (1)arcsecphys.veloc.ang;instr.beamfloatHPBW2Half Power Beam Width 2 (1)arcsecphys.angSize;instr.beamfloatPA[] Position Angledegpos.posAngfloatFPeak flux densitymJyphot.flux.density;em.radiofloate_F? Peak flux density errormJystat.errorfloatnullableS? Spatially integrated flux densitymJyphot.flux.densityfloatnullablee_S? Spatially integrated flux density errormJystat.errorfloatnullableJ/A+A/626/A126/table4Photometry used for dust grey-body fitTelTelescopemeta.id;instr.telcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintInstInstrumentmeta.id;instrcharlambdaWavelengthumem.wlfloatFWHMFWHMarcsecphys.angSizefloatSFlux density (1)mJyphot.flux.densityfloate_SFlux density error (2)mJystat.errorfloatJ/A+A/626/A126/listList of fits filesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintObs.dateObservation datestime.epoch;obsnullableFreqObserved frequencyHzem.freqdoublesizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitscharAssocDataAssociated Data web pagemeta.ref.urlchar