J/MNRAS/453/976ivo://CDS.VizieR/J/MNRAS/453/976doi:10.26093/cds/vizier.74530976CDSFairlamb J.R.Oudmaijer R.D.Mendigutia I.Ilee J.D.,van den Ancker M.E.2024-08-15T20:15:38Z2016-06-24T12:49:31ZCDS support team

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

cds-question@unistra.frvariable-starspre-main-sequence-starsspectroscopyaccretionHerbig Ae/Be stars (HAeBes) span a key mass range that links low- and high-mass stars, and thus provide an ideal window from which to explore their formation. This paper presents Very Large Telescope/X-shooter spectra of 91 HAeBes, the largest spectroscopic study of HAeBe accretion to date. A homogeneous approach to determining stellar parameters is undertaken for the majority of the sample. Measurements of the ultraviolet are modelled within the context of magnetospheric accretion, allowing a direct determination of mass accretion rates. Multiple correlations are observed across the sample between accretion and stellar properties: the youngest and often most massive stars are the strongest accretors, and there is an almost 1:1 relationship between the accretion luminosity and stellar luminosity. Despite these overall trends of increased accretion rates in HAeBes when compared to classical T Tauri stars, we also find noticeable differences in correlations when considering the Herbig Ae and Herbig Be subsets. This, combined with the difficulty in applying a magnetospheric accretion model to some of the Herbig Be stars, could suggest that another form of accretion may be occurring within Herbig Be mass range.2015MNRAS.453..976Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/453/976CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/106/656 : Herbig Ae/Be stars (Brooke+, 1993)J/A+AS/104/315 : Member of Herbig Ae/Be stellar group (The+ 1994)J/A+AS/111/399 : Polarization variability in Herbig Ae/Be stars (Jain+, 1995)J/AJ/118/1043 : Herbig Ae/Be stars catalog (Herbst+, 1999)J/AJ/126/2971 : UBVRI photometry of 131 Herbig Ae/Be (Vieira+, 2003)J/AJ/129/856 : Herbig Ae/Be stars in nearby OB associations (Hernandez+ 2005)J/ApJ/653/657 : Spectroscopic observations of Herbig Ae/Be stars (Manoj+, 2006J/ApJ/658/358 : Ae/Be stars of Magellanic Bridge in JHKs (Nishiyama+, 2007)J/ApJ/698/2031 : Polarimetry of HAeBe stars (Rodrigues+, 2009)J/A+A/555/A64 : Identifying gaps in flaring Herbig Ae/Be diskshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/453/976https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/453/976http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/453/976https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/453/976https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/453/976http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/453/976GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/453/976/sample (Observations (table1), derived parameters (table2) accretions rates (table3) and literature photometry (tablea1))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/453/976/sample?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/453/976/sample?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/453/976/sample?GETtext/xml+votable180.050000true76.124583-3.7880.0055555555555555566/20831 20934 21354 21402 21418 21421 21430 21436 21439 21456 21458 21643 21646 22020 22047 22080 22804 22828-22829 22841 22860-22861 22886 22892 22895 22981 23636-23637 23646 23717 23736 23739 23795 28921 29193 30251 31259 36956 37169 37186 37334 37353 37362 37366 37676 37714 37851 37883 37886 37890 37916 37932 37934 37978 38002 39163 39228 39260 39290 39908 39926 39929 41472 41662 41698 41734 41812 42382 42429 42595 42611 42644 42931 42972 42988 43235 43444 43637 44049 44301 44356 44362https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/453/976?format=asciiOpticaldefaultJ/MNRAS/453/976/sampleObservations (table1), derived parameters (table2) accretions rates (table3) and literature photometry (tablea1)Distl? Distancepcpos.distanceintnullabler_DistlReference for Distance, in refs.dat filemeta.ref;pos.framecharSimbadNameSimbad column added by the CDSmeta.idcharNameNamemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainObs.dateObservation datetime.epoch;obsnullableTUVBUVB arm exposure time(s) (in seconds)time.expocharTVISVIS arm exposure time(s) (in seconds)time.expocharTNIRNIR arm exposure time(s) (in seconds)time.expocharNDITNumber of detector integration times for the NIR armmeta.numberintSNRUVBUBV arm signal-to-noise ratiostat.snrintSNRVISVIS arm signal-to-noise ratiostat.snrintSNRNIRNIR arm signal-to-noise ratiostat.snrintTeffEffective temperatureKphys.temperature.effectiveinte_Teffrms uncertainty on TeffKstat.error;phys.temperature.effectiveintloggSurface gravitylog(cm.s**-2)phys.gravityfloatE_loggError on logg (upper value)log(cm.s**-2)stat.error;stat.maxfloate_loggError on logg (lower value)log(cm.s**-2)stat.errorfloatlogLLuminositylog(solLum)phys.luminosityfloatE_logLError on logL (upper value)log(solLum)stat.error;stat.maxfloate_logLError on logL (lower value)log(solLum)stat.errorfloatMMasssolMassphys.massfloatE_MError on Mass (upper value)solMassstat.error;stat.maxfloate_MError on Mass (lower value)solMassstat.errorfloatRRadiussolRadphys.size.radiusfloatE_RError on Radius (upper value)solRadstat.error;stat.maxfloate_RError on Radius (lower value)solRadstat.errorfloatAVAbsorption in V bandmagphot.mag;em.opt.VfloatE_AVError on AV (upper value)magstat.error;stat.maxfloate_AVError on AV (lower value)magstat.errorfloatAgeAgeMyrtime.agefloatE_AgeError on Age (upper value)Myrstat.error;stat.maxfloate_AgeError on Age (lower value)Myrstat.error;time.agefloatDistDistancepcpos.distanceintE_DistError on Distance (upper value)pcstat.error;stat.maxinte_DistError on Distance (lower value)pcstat.errorintNotes[+* ] Notes for stars for which a distance estimate from the literature is used, or if the star was moved to the ZAMS (1)meta.notecharr_DistReferences for Dist (2)meta.ref;pos.framecharl_DDB[=< ] Limit flag on DDBmeta.code.errorcharDDB? Measured Balmer excessmagphot.color.excessfloatnullableE_DDB? Error on {Delta}DB (upper value) (1)magstat.error;stat.maxfloatnullablee_DDB? Error on {Delta}DB (lower value) (1)magstat.errorfloatnullablel_f[=< ] Limit flag on fmeta.code.errorcharf? Filling factor%arith.factor;stat.filling;arith.ratiofloatnullableE_f? Error on f (upper value)%stat.error;stat.maxfloatnullablee_f? Error on f (lower value)%stat.errorfloatnullablel_log(dMacc/dt)[=< ] Limit flag on log(dMacc/dt)meta.code.errorcharlog(dMacc/dt)? Derived accretion ratelog(solMass.yr**-1)arith.ratefloatnullableE_log(dMacc/dt)? Error on log(dMacc/dt) (upper value)log(solMass.yr**-1)stat.error;stat.maxfloatnullablee_log(dMacc/dt)? Error on log(dMacc/dt) (lower value)log(solMass.yr**-1)stat.errorfloatnullableMetMethod(s) used to obtain the valuesmeta.notecharl_logLacc[=< ] Limit flag on logLaccmeta.code.errorcharlogLacc? Accretion luminositylog(solLum)phys.luminosityfloatnullableE_logLacc? Error on logLacc (upper value)log(solLum)stat.error;stat.maxfloatnullablee_logLacc? Error on logLacc (lower value)log(solLum)stat.errorfloatnullableNote[y/n-] Achievable by MA (2)meta.notecharUmagU magnitudemagphot.mag;em.opt.UfloatBmagB magnitudemagphot.mag;em.opt.BfloatVmagV magnitudemagphot.mag;em.opt.VfloatRmag? R magnitudemagphot.mag;em.opt.RfloatnullableImag? I magnitudemagphot.mag;em.opt.Ifloatnullabler_UmagReference for photometry, in refs.dat filemeta.ref;pos.framecharTefflEffective temperatureKphys.temperature.effectiveintn_Teffl[+] Note on Teff (1)meta.notecharr_TefflReference for Teff, in refs.dat filemeta.ref;pos.framecharJ/MNRAS/453/976/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codemeta.notecharBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notechar