J/ApJ/688/597ivo://CDS.VizieR/J/ApJ/688/597doi:10.26093/cds/vizier.16880597CDSCurrie T.Plavchan P.Kenyon S.J.2017-09-29T09:03:54Z2010-12-22T15:38:42ZCDS support team

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

cds-question@unistra.fropen-star-clustersinfrared-photometrydwarf-starsstellar-spectral-typesline-intensitiesspectroscopyWe describe Spitzer IRAC and MIPS observations of the nearby 25Myr old open cluster NGC 2232. Combining these data with ROSAT All-Sky Survey observations, proper motions, and optical photometry/spectroscopy, we construct a list of highly probable cluster members. We identify one A-type star, HD 45435, that has definite excess emission at 4.5-24um indicative of debris from terrestrial planet formation. We also identify 2-4 late-type stars with possible 8um excesses and 8 early-type stars with definite 24um excesses. Constraints on the dust luminosity and temperature suggest that the detected excesses are produced by debris disks. From our sample of B and A stars, stellar rotation appears to be correlated with 24um excess, a result that would be expected if massive primordial disks evolve into massive debris disks. To explore the evolution of the frequency and magnitude of debris around A-type stars, we combine our results with data for other young clusters.2008ApJ...688..597Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/688/597CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIX/28 : ROSAT HRI Pointed Observations (1RXH) (ROSAT Team, 2000)J/ApJS/188/242 : Variations on debris disks. II. (Kenyon+, 2010)J/ApJ/653/675 : Spitzer 24{mu}m photometry of A dwarfs (Su+, 2006)J/ApJ/620/1010 : Spitzer 24{mu}m photometry of A dwarfs (Rieke+, 2005)http://heasarc.gsfc.nasa.gov/W3Browse/ : NASA HEASARC archive home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/688/597https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/688/597http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/688/597https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/688/597https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/688/597http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/688/597GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/688/597/table1 (Photometry catalogue for sources detected in the NGC 2232 field)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/688/597/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/688/597/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/688/597/table1?GETtext/xml+votable180.050000true96.4706-5.39940.005555555555555556Cone search capability for table J/ApJ/688/597/table2 (Spectroscopy of selected NGC 2232 sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/688/597/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/688/597/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/688/597/table2?GETtext/xml+votable180.050000true96.572-4.59890.0055555555555555565/55146.772611666688002e-21 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/688/597?format=asciiOpticalInfrareddefaultJ/ApJ/688/597/table1Photometry catalogue for sources detected in the NGC 2232 fieldrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDSource identification number (G1)meta.id;meta.mainintprimaryMmSimbad column added by the CDSmeta.code.membercharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainVmag? V band magnitudemagphot.mag;em.opt.VfloatnullableJmag2MASS J band magnitudemagphot.mag;em.IR.JfloatHmag2MASS H band magnitudemagphot.mag;em.IR.HfloatKsmag2MASS Ks band magnitudemagphot.mag;em.IR.Kfloat3.6mag? Spitzer/IRAC 3.6 micron band magnitudemagphot.mag;em.IR.3-4umfloatnullablee_3.6mag? The 1{sigma} error in 3.6magmagstat.errorfloatnullable4.5mag? Spitzer/IRAC 4.5 micron band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_4.5mag? The 1{sigma} error in 4.5magmagstat.errorfloatnullable5.8mag? Spitzer/IRAC 5.8 micron band magnitudemagphot.flux.density;em.IR.4-8umfloatnullablee_5.8mag? The 1{sigma} error in 5.8magmagstat.errorfloatnullable8.0mag? Spitzer/IRAC 8.0 micron band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_8.0mag? The 1{sigma} error in 8.0magmagstat.errorfloatnullable24mag? Spitzer/MIPS 24 micron band magnitudemagphot.flux.density;em.IR.15-30umfloatnullablee_24mag? The 1{sigma} error in 24magmagstat.errorfloatnullable2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharJ/ApJ/688/597/table2Spectroscopy of selected NGC 2232 sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDSource identification number (G1)meta.id;meta.mainintRAJ2000Right ascension in decimal degree (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainSpTMK spectral typesrc.spTypechare_SpTUncertainty on SpTstat.errorfloatEWH{alpha} equivalent width0.1nmspect.line.eqWidth;em.line.HalphafloatFWHM? H{alpha} FWHM0.1nmspect.line.widthfloatnullableCts? ROSAT counts in X-rayks**-1phot.count;em.X-rayfloatnullableMm?Yes or No for membermeta.code.memberchar