J/ApJ/698/1989ivo://CDS.VizieR/J/ApJ/698/1989doi:10.26093/cds/vizier.16981989CDSBalog Z.Kiss L.L.Vinko J.Rieke G.H.Muzerolle J.Gaspar A.,Young E.T.Gorlova N.2017-07-10T15:23:34Z2011-08-02T11:46:02ZCDS support team

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

cds-question@unistra.fropen-star-clustersinfrared-photometryvisible-astronomybroad-band-photometryWe present a Spitzer IRAC and MIPS survey of NGC 2451A and B, two open clusters in the 50-80Myr age range. We complement these data with extensive ground-based photometry and spectroscopy to identify the cluster members in the Spitzer survey field. We find only two members with 8um excesses. The incidence of excesses at 24um is much higher, i.e., 11 of 31 solar-like stars and 1 of 7 early-type (A) stars. This work nearly completes the debris disk surveys with Spitzer of clusters in the 30-130Myr range. This range is of interest because it is when large planetesimal collisions may have still been relatively common (as indicated by the one that led to the formation of the Moon during this period of the evolution of the solar system). We review the full set of surveys and find that there are only three possible cases out of about 250 roughly solar-mass stars where very large excesses suggest that such collisions have occurred recently.2009ApJ...698.1989Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/698/1989CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/A+A/402/571 : X-ray study of NGC 2451 A and B. (Huensch+ 2003)J/AJ/122/1486 : NGC 2451A proper motions and membership (Platais+, 2001)J/A+A/341/469 : Geneva photometry of NGC 2451 and HR 2968 (Carrier+ 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/698/1989https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/698/1989http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/698/1989https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/698/1989https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/698/1989http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/698/1989GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/698/1989/ngc2451 (UBVRIJHK (tables 3-4) and Spitzer (tables 5-6) photometry of members of NGC 2451A+B)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/698/1989/ngc2451?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/698/1989/ngc2451?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/698/1989/ngc2451?GETtext/xml+votable180.050000true115.72653-37.990710.005555555555555556Cone search capability for table J/ApJ/698/1989/table7 (Measured and predicted photospheric (K-[24])_0_ colors of cluster members with 24um excesses)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/698/1989/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/698/1989/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/698/1989/table7?GETtext/xml+votable180.050000true116.04942-37.739940.0055555555555555566/39354 39355 39696 396976.772611666688002e-21 6.118840631666147e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/698/1989?format=asciiOpticalInfrareddefaultJ/ApJ/698/1989/ngc2451UBVRIJHK (tables 3-4) and Spitzer (tables 5-6) photometry of members of NGC 2451A+BSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRef[HP] Membership reference (1)pos.framecharCompmeta.id.parentchare24[6,19]? The 24{mu}m excess source from Table 7meta.idintnullableUmag? The Johnson U band magnitudemagphot.mag;em.opt.Ufloatnullablee_Umag? The 1{sigma} error in Umagmagstat.error;phot.mag;em.opt.UfloatnullableBmag? The Johnson B band magnitudemagphot.mag;em.opt.Bfloatnullablee_Bmag? The 1{sigma} error in Bmagmagstat.error;phot.mag;em.opt.BfloatnullableVmagThe Johnson V band magnitudemagphot.mag;em.opt.Vfloate_Vmag? The 1{sigma} error in Vmagmagstat.error;phot.mag;em.opt.VfloatnullableRcmag? The Cousins R band magnitudemagphot.mag;em.opt.Rfloatnullablee_Rcmag? The 1{sigma} error in Rcmagmagstat.error;phot.mag;em.opt.RfloatnullableIcmag? The Cousins I band magnitudemagphot.mag;em.opt.Ifloatnullablee_Icmag? The 1{sigma} error in Icmagmagstat.error;phot.mag;em.opt.IfloatnullableJmag2MASS Johnson J band magnitudemagphot.mag;em.IR.Jfloate_Jmag? The 1{sigma} error in Jmagmagstat.error;phot.mag;em.IR.JfloatnullableHmag2MASS Johnson H band magnitudemagphot.mag;em.IR.Hfloate_Hmag? The 1{sigma} error in Hmagmagstat.error;phot.mag;em.IR.HfloatnullableKsmag2MASS Johnson Ks band magnitudemagphot.mag;em.IR.Kfloate_Ksmag? The 1{sigma} error in Ksmagmagstat.error;phot.mag;em.IR.Kfloatnullable[3.6]? Spitzer/IRAC 3.6{mu}m band magnitudemagphot.mag;em.IR.3-4umfloatnullablee_[3.6]? The 1{sigma} error in 3.6{mu}m magmagstat.errorfloatnullable[4.5]? Spitzer/IRAC 4.5{mu}m band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_[4.5]? The 1{sigma} error in 4.5{mu}m magmagstat.errorfloatnullable[5.8]? Spitzer/IRAC 5.8{mu}m band magnitudemagphot.flux.density;em.IR.4-8umfloatnullablee_[5.8]? The 1{sigma} error in 5.8{mu}m magmagstat.errorfloatnullable[8.0]? Spitzer/IRAC 8.0{mu}m band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_[8.0]? The 1{sigma} error in 8.0{mu}m magmagstat.errorfloatnullable[24]? Spitzer/MIPS 24{mu}m band magnitudemagphot.flux.density;em.IR.15-30umfloatnullablee_[24]? The 1{sigma} error in 24{mu}m magmagstat.errorfloatnullable2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharRAJ2000Right Ascension in degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in degrees (J2000)degpos.eq.dec;meta.mainJ/ApJ/698/1989/table7Measured and predicted photospheric (K-[24])_0_ colors of cluster members with 24um excessesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordinte24[6-19] Identification number (\dicS{[BKV2009] NN} in Simbad) \linkRole{photometry of this star }meta.id;meta.mainintprimaryComp[AB] NGC 2451 componentmeta.id.parentcharRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainK-[24]Measured (K-[24])_0_ color indexmagphot.color;em.IR;em.IRfloate_K-[24]K-[24] uncertaintymagstat.errorfloatK-[24]pPredicted photospheric K-[24] color indexmagphot.color;em.IR;em.IRfloatSigma{sigma} significance of the excess (1)stat.fit.goodnessint