J/A+A/587/A81ivo://CDS.VizieR/J/A+A/587/A81doi:10.26093/cds/vizier.35870081CDSBustamante I.Merin B.Bouy H.Manara C.Ribas A.Rivere-Marichalar P.2018-01-08T06:37:59Z2016-02-22T07:24:33ZCDS support team

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

cds-question@unistra.frpre-main-sequence-starsx-ray-sourcesstellar-massesDepending on whether a T Tauri star accretes material from its circumstellar disk or not, different X-ray emission properties can be found. The accretion shocks produce cool heating of the plasma, contributing to the soft X-ray emission from the star. Using X-ray data from the Chandra Orion Ultra-deep Project and accretion rates that were obtained with the Hubble Space Telescope/WFPC2 photometric measurements in the Orion Nebula Cluster, we studied the relation between the accretion processes and the X-ray emissions of a coherent sample of T Tauri sources in the region. We performed regression and correlation analyses of our sample of T Tauri stars between the X-ray parameters, stellar properties, and the accretion measurements. We find that a clear anti-correlation is present between the residual X-ray luminosity and the accretion rates in our samples in Orion that is consistent with that found on the XMM-Newton Extended Survey of the Taurus molecular cloud (XEST) study. A considerable number of classified non-accreting sources show accretion rates comparable to those of classical T Tauri Stars (CTTS). Our data do not allow us to confirm the classification between classical and weak-line T Tauri stars (WTTS), and the number of WTTS in this work is small compared to the complete samples. Thus, we have used the entire samples as accretors in our analysis. We provide a catalog with X-ray luminosities (corrected from distance) and accretion measurements of an Orion Nebula Cluster (ONC) T Tauri stars sample.2016A&A...587A..81Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/587/A81CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/755/154 : Mass accretion rates from HST in the ONC (Manara+, 2012)J/ApJS/160/319 : COUP: observations and source lists (Getman+, 2005)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/587/A81https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/587/A81http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/587/A81https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/587/A81https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/587/A81http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/587/A81GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/587/A81/sphalpha (Stellar parameters of sources which mass accretion rates were derived using the equivalent width of the H{alpha} line (table 4a))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/587/A81/sphalpha?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/587/A81/sphalpha?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/587/A81/sphalpha?GETtext/xml+votable180.050000true83.6704-5.37840.005555555555555556Cone search capability for table J/A+A/587/A81/sp2cd (Stellar parameters of sources which mass accretion rates were derived using excesses in the U band (table 4b))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/587/A81/sp2cd?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/587/A81/sp2cd?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/587/A81/sp2cd?GETtext/xml+votable180.050000true83.6227-5.39370.0055555555555555566/21438-21439 22804-22805https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/587/A81?format=asciiX-raydefaultJ/A+A/587/A81/sphalphaStellar parameters of sources which mass accretion rates were derived using the equivalent width of the H{alpha} line (table 4a)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCOUPIdentification number from COUP catalogmeta.id;meta.mainintRAJ2000Right ascension (J2000) from COUP catalogdegpos.eq.ra;meta.mainDEJ2000Declination (J2000) from COUP catalogdegpos.eq.dec;meta.mainlogLXLogarithmic X-ray luminosity from COUP cataloglog(1e-07W)phys.luminosity;em.X-raydoublee_logLXLogarithmic X-ray luminosity uncertainty from COUP cataloglog(1e-07W)stat.errordoubleOMIdentification number from Manara et al. (2012, Cat. J/ApJ/755/154, [MRD2012] NNNN in SImbad)meta.idintRA2degRight ascension (J2000) from Manara et al. (2012, Cat. J/ApJ/755/154)degpos.eq.raDE2degDeclination (J2000) from Manara et al. (2012, Cat. J/ApJ/755/154)degpos.eq.declogM*Logarithmic stellar mass from Manara et al. (2012, Cat. J/ApJ/755/154)log(solMass)phys.massdoublee_logM*Logarithmic stellar mass uncertainty from Manara et al. (2012, Cat. J/ApJ/755/154)log(solMass)stat.errordoublelogMaccLogarithmic mass accretion rate from Manara et al. (2012, Cat. J/ApJ/755/154)log(solMass.yr**-1)arith.rate;phys.massdoublee_logMaccLogarithmic mass accretion rate uncertainty from Manara et al. (2012, J/ApJ/755/154)log(solMass.yr**-1)stat.errordoubleSpTypeMK spectral Type from Manara et al. (2012, Cat. J/ApJ/755/154)src.spTypecharRLXolsResidual X-ray luminosity using the ordinary least square method (logLX/LX(Macc))phys.luminosity;arith.ratiodoublee_RLXolsResidual X-ray luminosity uncertainty using the ordinary least square methodstat.errordoubleRLXoutResidual X-ray luminosity using outlier rejection method (logLX/LX(Macc))phys.luminosity;arith.ratiodoublee_RLXoutResidual X-ray luminosity uncertainty using outlier rejection methodstat.errordoubleSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/587/A81/sp2cdStellar parameters of sources which mass accretion rates were derived using excesses in the U band (table 4b)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCOUPIdentification number from COUP catalogmeta.id;meta.mainintRAJ2000Right ascension (J2000) from COUP catalogdegpos.eq.ra;meta.mainDEJ2000Declination (J2000) from COUP catalogdegpos.eq.dec;meta.mainlogLXLogarithmic X-ray luminosity from COUP cataloglog(1e-07W)phys.luminosity;em.X-raydoublee_logLXLogarithmic X-ray luminosity uncertainty from COUP cataloglog(1e-07W)stat.errordoubleOMIdentification number from Manara et al. (2012, Cat. J/ApJ/755/154, [MRD2012] NNNN in SImbad)meta.idintRA2degRight ascension (J2000) from Manara et al. (2012, Cat. J/ApJ/755/154)degpos.eq.raDE2degDeclination (J2000) from Manara et al. (2012, Cat. J/ApJ/755/154)degpos.eq.declogM*Logarithmic stellar mass from Manara et al. (2012, Cat. J/ApJ/755/154)log(solMass)phys.massdoublee_logM*Logarithmic stellar mass uncertainty from Manara et al. (2012, Cat. J/ApJ/755/154)log(solMass)stat.errordoublelogMaccLogarithmic mass accretion rate from Manara et al. (2012, Cat. J/ApJ/755/154)log(solMass.yr**-1)arith.rate;phys.massdoublee_logMaccLogarithmic mass accretion rate uncertainty from Manara et al. (2012, J/ApJ/755/154)log(solMass.yr**-1)stat.errordoubleSpTypeMK spectral Type from Manara et al. (2012, Cat. J/ApJ/755/154)src.spTypecharRLXolsResidual X-ray luminosity using the ordinary least square method (logLX/LX(Macc))phys.luminosity;arith.ratiodoublee_RLXolsResidual X-ray luminosity uncertainty using the ordinary least square methodstat.errordoubleRLXoutResidual X-ray luminosity using outlier rejection method (logLX/LX(Macc))phys.luminosity;arith.ratiodoublee_RLXoutResidual X-ray luminosity uncertainty using outlier rejection methodstat.errordoubleSimbadSimbad column added by the CDSmeta.ref.urlchar