J/ApJ/750/98ivo://CDS.VizieR/J/ApJ/750/98doi:10.26093/cds/vizier.17500098CDSUrban L.E.Rieke G.Su K.Trilling D.E.2017-09-22T16:16:05Z2014-01-27T12:01:03ZCDS support team

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

cds-question@unistra.frinfrared-photometryopen-star-clustersstellar-spectral-typesWe use Spitzer Space Telescope 24 {mu}m data to search for debris disks among 122 AFGKM stars from the ~670 Myr clusters Hyades, Coma Ber, and Praesepe, utilizing a number of advances in data reduction and determining the intrinsic colors of main-sequence stars. For our sample, the 1{sigma} dispersion about the main-sequence V-K_S_, K_S_-[24] locus is approximately 3.1%. We identify seven debris disks at 10% or more ( >=3{sigma} confidence level) above the expected K_S_-[24] for purely photospheric emission. The incidence of excesses of 10% or greater in our sample at this age is 5.7^+3.1^_-1.7_%. Combining with results from the literature, the rate is 7.8^+4.2^_-2.1_% for early-type (B9-F4) stars and 2.7^+3.3^_-1.7_% for solar-like (F5-K9) stars. Our primary sample has strict criteria for inclusion to allow comparison with other work; when we relax these criteria, three additional debris disks are detected. They are all around stars of solar-like type and hence reinforce our conclusion that disks around such stars are still relatively common at 670Myr and are similar to the rate around early-type stars. The apparently small difference in decay rates between early-type and solar-like stars is inconsistent with the first-order theoretical predictions that the later type stellar disks would decay an order of magnitude more quickly than the earlier type ones.2012ApJ...750...98Uhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/750/98CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)J/A+A/544/A111 : Low-mass stars in Coma Ber (Melnikov+, 2012)J/MNRAS/426/3419 : UKIDSS GCS Praesepe members (Boudreault+, 2012)J/A+A/531/A92 : Deep all-sky census of the Hyades (Roeser+, 2011)J/ApJ/697/1578 : A debris disk study of Praesepe (Gaspar+, 2009)J/ApJ/679/720 : Spitzer observations of the Hyades (Cieza+, 2008)J/MNRAS/365/447 : Stellar members of Coma Berenices cluster (Casewell+, 2006)J/AJ/127/3579 : Radial velocities of Hyades stars (Paulson+, 2004)J/AJ/124/1570 : JHKs photometry in Praesepe (Adams+, 2002)J/A+A/375/989 : JHK photometry of Praesepe low-mass stars (Bouvier+, 2001)J/A+AS/136/307 : Coma Berenices astrometric catalogue (Abad+ 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/750/98https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/750/98http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/750/98https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/750/98https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/750/98http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/750/98GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/750/98/table1 (Cluster stars considered in the Hyades, Coma Ber or Praesepe)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/750/98/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/750/98/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/750/98/table1?GETtext/xml+votable180.050000true185.098194426.046330.0055555555555555565/5881 5886 7123 6/60 75 78 251 272 309 322 334 336 342 348 357 472 483 917 1024 1025 1032 1033 1075 4687 4696 4698 4699 4709 4720 4721 10276 23017 23286 23313 23383 23416 23450 23454 23478 23479 23493 23497 23501 23502 23503 23504 23511 23513 23515 23518 23535 23537 23538 23539 23542 23548 23550 24068 24099 24104 24192 24194 24206 24207 24209 24251 28130 28131 28136 28137 28140 28143 28433 28437 28438 28439 28443 28444 28446 28469 28480 28481 28482 28484 28485 28487 28489 28490 28491 28496 28498 28504 28513 28515 285166.772611666688002e-21 9.710690472292815e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/750/98?format=asciiOpticalInfrareddefaultJ/ApJ/750/98/table1Cluster stars considered in the Hyades, Coma Ber or PraesepeNameStar namemeta.ref.urlchar[24][3/12]? 24um magnitudemagphot.flux.density;em.IR.15-30umfloatnullablee_[24][0.01/0.4]? [24] uncertaintymagstat.errorfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpTMK spectral typesrc.spTypecharVmag[4/15]? V-band magnitude (1)magphot.mag;em.opt.VfloatnullableKsmag[3/12] 2MASS Ks-band magnitudemagphot.mag;em.IR.Kfloate_Ksmag[0.01/10] Ksmag uncertaintymagstat.error;phot.mag;em.IR.KfloatF24[0.2/396]? Spitzer/MIPS 24um flux densitymJyphot.flux.density;em.IR.15-30umfloatnullableK-[24]e[0.02/10]? K-[24] errormagstat.errorfloatnullableExcl[1-7, ] Exclusion reason(s) (2)meta.codecharClCluster (h=Hyades, c=Coma Ber, p=Praesepe)meta.id.parentcharHIPCross-match with the Hipparcos catalog (I/239) within 2"meta.ref.urlintnullableCcatCross-match with the clusters catalog (J/ApJ/697/1578, J/AJ/127/3579, J/A+AS/136/307, J/ApJ/679/720) within 2"meta.ref.urlintnullable2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246) within 3"meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from SIMBAD database (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD database (declination part)degpos.eq.dec;meta.main