J/MNRAS/424/3178ivo://CDS.VizieR/J/MNRAS/424/3178doi:10.26093/cds/vizier.74243178CDSBell C.P.M.Naylor T.Mayne N.J.Jeffries R.D.Littlefair S.P.2025-07-18T20:16:35Z2013-08-19T15:52:02ZCDS support team

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

cds-question@unistra.fropen-star-clusterspre-main-sequence-starsphotometrystellar-evolutionary-tracksWe present a critical assessment of commonly used pre-main-sequence isochrones by comparing their predictions to a set of well-calibrated colour-magnitude diagrams of the Pleiades in the wavelength range 0.4-2.5um. Our analysis shows that for temperatures less than 4000K, the models systematically overestimate the flux by a factor of 2 at 0.5um, though this decreases with wavelength, becoming negligible at 2.2um. In optical colours this will result in the ages for stars younger than 10Myr being underestimated by factors of between 2 and 3. We show that using observations of standard stars to transform the data into a standard system can introduce significant errors in the positioning of pre-main sequences in colour-magnitude diagrams. Therefore, we have compared the models to the data in the natural photometric system in which the observations were taken. Thus we have constructed and tested a model of the system responses for the Wide-Field Camera on the Isaac Newton Telescope. As a benchmark test for the development of pre-main-sequence models, we provide both our system responses and the Pleiades sequence.2012MNRAS.424.3178Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/424/3178CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/380/712 : ZYJHK photometry in Pleiades (Lodieu+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/424/3178https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/424/3178http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/424/3178https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/424/3178https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/424/3178http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/424/3178GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/424/3178/table2 (The full Pleiades photometric catalogue with colours and magnitudes in the natural INT/WFC photometric system (includes also table5) (24-Jan-2024 version))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/424/3178/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/424/3178/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/424/3178/table2?GETtext/xml+votable180.050000true56.642237523.623952780.005555555555555556Cone search capability for table J/MNRAS/424/3178/table4 (The transformed Stripe 82 standard star catalogue with colours and magnitudes in the natural INT/WFC photometric system)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/424/3178/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/424/3178/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/424/3178/table4?GETtext/xml+votable180.050000true311.78060833-1.0979250.0055555555555555565/7508 6/461-463 484-485 496 17661 17663 17832 17834 18840-18841 18843 23139 23142 23145 231488.650015785639275e-20 5.934602767263733e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/424/3178?format=asciidefaultJ/MNRAS/424/3178/table2The full Pleiades photometric catalogue with colours and magnitudes in the natural INT/WFC photometric system (includes also table5) (24-Jan-2024 version)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField designationobs.fieldfloatIDIdentification numbermeta.id;meta.mainintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainindexedDEJ2000Declination (J2000.0)pos.eq.dec;meta.maingmag? INT/WFC g magnitudemagphot.mag;em.opt.Bfloatnullablee_gmag[]? rms uncertainty on gmagmagstat.error;phot.magfloatnullableq_gmagQuality flag on gmag, O=OK (G1)meta.code.qualcharg-i? INT/WFC g-i colour indexmagphot.color;em.opt.B;em.opt.Ifloatnullablee_g-i? rms uncertainty on g-imagstat.errorfloatnullableq_g-iQuality flags on g,i, OO=OK (G1)meta.code.qualcharU-g? INT/WFC (U-g) colour indexmagphot.color;em.UV;em.optfloatnullablee_U-g? rms uncertainty on U-gmagstat.errorfloatnullableq_U-gQuality flags on U,g, OO=OK (G1)meta.code.qualcharr-i? INT/WFC (r-i) colour indexmagphot.color;em.opt.R;em.opt.Ifloatnullablee_r-i? rms uncertainty on r-imagstat.error;phot.color;em.opt.Rfloatnullableq_r-iQuality flags on r,i, OO=OK (G1)meta.code.qual;phot.color;em.opt.Rchari-Z? INT/WFC (i-Z) colour indexmagphot.color;em.opt.I;em.opt.Ifloatnullablee_i-Z? rms uncertainty on i-Zmagstat.errorfloatnullableq_i-ZQuality flags on i,Z, OO=OK (G1)meta.code.qualcharUmag? INT/WFC U magnitudemagphot.mag;em.opt.Ufloatnullablee_Umag[]? rms uncertainty on Umagmagstat.error;phot.magfloatnullableq_UmagQuality flag on Umag, O=OK (G1)meta.code.qualcharrmag? INT/WFC r magnitudemagphot.mag;em.opt.Rfloatnullablee_rmag[]? rms uncertainty on rmagmagstat.error;phot.magfloatnullableq_rmagQuality flag on rmag, O=OK (G1)meta.code.qualcharimag? INT/WFC i magnitudemagphot.mag;em.opt.Ifloatnullablee_imag[]? rms uncertainty on imagmagstat.error;phot.magfloatnullableq_imagQuality flag on imag, O=OK (G1)meta.code.qualcharZmag? INT/WFC Z magnitudemagphot.mag;em.opt.Ifloatnullablee_Zmag[]? rms uncertainty on Zmagmagstat.error;phot.magfloatnullableq_ZmagQuality flag on Zmag, O=OK (G1)meta.code.qual;pos.cartesian.zcharMmeta.code.membercharJ/MNRAS/424/3178/table4The transformed Stripe 82 standard star catalogue with colours and magnitudes in the natural INT/WFC photometric systemrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldFieldobs.fieldfloatIDIdentification numbermeta.id;meta.mainintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainindexedDEJ2000Declination (J2000.0)pos.eq.dec;meta.maingmagINT/WFC g magnitudemagphot.mag;em.opt.Rfloate_gmagrms uncertainty on gmagmagstat.error;phot.magfloatg-iINT/WFC g-i colour indexmagphot.color;em.opt.B;em.opt.Ifloate_g-irms uncertainty on g-imagstat.errorfloatU-gINT/WFC (U-g) colour indexmagphot.color;em.UV;em.optfloate_U-grms uncertainty on e_U-gmagstat.errorfloatq_U-gQuality flag on U-g, OO=OK (G1)meta.code.qualcharr-iINT/WFC (r-i) colour indexmagphot.color;em.opt.R;em.opt.Ifloate_r-irms uncertainty on e_r-imagstat.error;phot.color;em.opt.Rfloatq_r-iQuality flag on r-i, OO=OK (G1)meta.code.qual;phot.color;em.opt.Rchari-ZINT/WFC (i-Z) colour indexmagphot.color;em.opt.I;em.opt.Ifloate_i-Zrms uncertainty on e_i-Zmagstat.errorfloatq_i-ZQuality flag on i-Z, OO=OK (G1)meta.code.qualcharq_gmagQuality flag on gmag, O=OK (G1)meta.code.qualcharq_g-iQuality flag on g-i, OO=OK (G1)meta.code.qualcharJ/MNRAS/424/3178/table3The calculated transformations between the SDSS and INT/WFC photometric systems for unreddened Main-Sequence starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTeffEffective temperatureKphys.temperature.effectiveintloggsurface gravitylog(cm.s**-2)phys.gravityfloatDgg magnitude difference, INT/WFC-SDSSmagphot.mag;arith.diffdoubleD(g-i)g-i colour index difference, INT/WFC-SDSSmagphot.mag;arith.diffdouble(g-i)SDSS g-i colour indexmagphot.color;em.opt.B;em.opt.IdoubleD(u-g)u-g colour index difference, INT/WFC-SDSSmagphot.mag;arith.diffdouble(u-g)SDSS u-g colour indexmagphot.colordoubleD(r-i)r-i colour index difference, INT/WFC-SDSSmagphot.mag;arith.diffdouble(r-i)SDSS r-i colour indexmagphot.colordoubleD(i-z)i-z colour index difference, INT/WFC-SDSSmagphot.mag;arith.diffdouble(i-z)SDSS i-z colour indexmagphot.colordoubleJ/MNRAS/424/3178/table6The Pleiades single-star sequence in the INT/WFC and 2MASS bandpassesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintgmag? INT/WFC g magnitudemagphot.mag;em.opt.Bfloatnullablermag? INT/WFC r magnitudemagphot.mag;em.opt.Rfloatnullableimag? INT/WFC i magnitudemagphot.mag;em.opt.IfloatnullableZmag? INT/WFC Z magnitudemagphot.mag;em.opt.IfloatnullableJmag? 2MASS J magnitudemagphot.mag;em.IR.JfloatnullableHmag? 2MASS H magnitudemagphot.mag;em.IR.HfloatnullableKsmag? 2MASS Ks magnitudemagphot.mag;em.IR.KfloatnullableJ/MNRAS/424/3178/tablea1Normalized INT/WFC system responserecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFilter[UgriZ] INT/WFC Filter namemeta.id;instr.filtercharlambdaWavelength {lambda} ({AA})0.1nmem.wlintR[0/1] Filter normalized responsephys.transmission;instr.filterfloat