J/A+A/631/A30ivo://CDS.VizieR/J/A+A/631/A30doi:10.26093/cds/vizier.36310030CDSPostel A.Audard M.Vorobyov E.Dionatos O.Rab C.Guedel M.2023-01-30T08:32:27Z2019-10-15T08:17:58ZCDS support team

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

cds-question@unistra.frspectroscopymillimeter-astronomysubmillimeter-astronomyprotostarspre-main-sequence-starsyoung-stellar-objectsEpisodic accretion plays an important role in the evolution of young stars. Although it has been under investigation for a long time, the origin of such episodic accretion events is not yet understood. We investigate the dust and gas emission of a sample of young outbursting sources in the infrared to get a better understanding of their properties and circumstellar material, and we use the results in a further work to model the objects. We used Herschel data, from our PI program of 12 objects and complemented with archival observations to obtain the spectral energy distributions (SEDs) and spectra of our targets. We report here the main characteristics of our sample, focussing on the SED properties and on the gas emission lines detected in the PACS and SPIRE spectra. The SEDs of our sample show the diversity of the outbursting sources, with several targets showing strong emission in the far-infrared from the embedded objects. Most of our targets reside in a complex environment, which we discuss in detail. We detected several atomic and molecular lines, in particular rotational CO emission from several transitions from J=38-37 to J=4-3. We constructed rotational diagrams for the CO lines, and derived in three domains of assumed local thermodynamic equilibrium (LTE) temperatures and column densities, ranging mainly between 0-100K and 400-500K. We confirm correlation in our sample between intense CO J=16-15 emission and the column density of the warm domain of CO, N(warm). We notice a strong increase in luminosity of HH 381 IRS and a weaker increase for PP 13 S, which shows the beginning of an outburst.2019A&A...631A..30Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/631/A30CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/631/A30https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/631/A30http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/631/A30https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/631/A30https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/631/A30http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/631/A30GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/631/A30/stars (List of studied stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/631/A30/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/631/A30/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/631/A30/stars?GETtext/xml+votable180.050000true117.6482917-33.10663890.0055555555555555566/1606 15422 15630 15683 21430 22805 22873 30613 39753 42233 42610https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/631/A30?format=asciiMillimeterdefaultJ/A+A/631/A30/starsList of studied starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharRAJ2000Simbad Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainLabelLabel used in table1meta.idcharSNameSimbad namemeta.idcharFluxesDisplay the fluxes listed in table fluxes.datmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/631/A30/fluxesLine fluxes for the YSOsn_V883[*] Note on V883 (1)meta.notechare_V883? Error on V883W.m**-2stat.errordoublenullablee_Haro? Error on HaroW.m**-2stat.errordoublenullablel_HH354Limit flag on HH354meta.code.errorcharHH354? HH354 IRS flux density of line or upper limitW.m**-2phot.fluxdoublenullablen_HH354[*] Note on HH354 (1)meta.notechare_HH354? Error on HH354W.m**-2stat.errordoublenullablel_HH381Limit flag on HH381meta.code.errorcharHH381? HH381 IRS flux density of line or upper limitW.m**-2phot.fluxdoublenullablen_HH381[*] Note on HH381 (1)meta.notechare_HH381? Error on HH381W.m**-2stat.errordoublenullablel_ParsLimit flag on Parsmeta.code.errorcharPars? Parsamian 21 flux density of line or upper limitW.m**-2phot.fluxdoublenullablen_Pars[*] Note on Pars (1)meta.notechare_Pars? Error on ParsW.m**-2stat.errordoublenullablel_PP13Limit flag on PP13meta.code.errorcharPP13? PP 13 S flux density of line or upper limitW.m**-2phot.fluxdoublenullablen_PP13[*] Note on PP13 (1)meta.notechare_PP13? Error on PP13W.m**-2stat.errordoublenullablel_Re50Limit flag on Re50meta.code.errorcharRe50? Re 50 N IRS (HBC 494) flux density of line or upper limitW.m**-2phot.fluxdoublenullablen_Re50[*] Note on Re50 (1)meta.notechare_Re50? Error on Re50W.m**-2stat.errordoublenullablel_V346Limit flag on V346meta.code.errorcharV346? V346 Nor flux density of line or upper limitW.m**-2phot.fluxdoublenullablen_V346[*] Note on V346 (1)meta.notechare_V346? Error on V346W.m**-2stat.errordoublenullablel_V733Limit flag on V733meta.code.errorcharV733? V733 Cep flux density of line or upper limitW.m**-2phot.fluxdoublenullablen_V733[*] Note on V733 (1)meta.notechare_V733? Error on V733W.m**-2stat.errordoublenullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength of the observed lineumem.wl;spect.linedoubleMol/AtoMolecule or Atommeta.id;phys.molTransEnergy transition of the linephys.energy;spect.line;phys.atmol.transitionl_BRANLimit flag on BRANmeta.code.errorcharBRAN? Bran 76 flux density of line or upper limitW.m**-2phot.fluxdoublenullablen_BRAN[*] Note on BRAN (1)meta.notechare_BRAN? Error on BRANW.m**-2stat.errordoublenullablel_EXLupLimit flag on EXLupmeta.code.errorcharEXLup? EX Lup flux density of line or upper limitW.m**-2phot.fluxdoublenullablen_EXLup[*] Note on EXLup (1)meta.notechare_EXLup? Error on EXLupW.m**-2stat.errordoublenullablel_HaroLimit flag on Harometa.code.errorcharHaro? Haro 5a IRS flux density of line or upper limitW.m**-2phot.fluxdoublenullablen_Haro[*] Note on Haro (1)meta.notecharl_V883Limit flag on V883meta.code.errorcharV883? V883 Ori flux density of line or upper limitW.m**-2phot.fluxdoublenullablel_V1647Limit flag on V1647meta.code.errorcharV1647? V1647 Ori flux density of line or upper limitW.m**-2phot.fluxdoublenullablen_V1647[*] Note on V1647 (1)meta.notechare_V1647? Error on V1647W.m**-2stat.errordoublenullable