J/ApJ/798/87ivo://CDS.VizieR/J/ApJ/798/87doi:10.26093/cds/vizier.17980087CDSMittal T.Chen C.H.Jang-Condell H.Manoj P.Sargent B.A.Watson D.M.,Lisse C.M.2017-10-26T12:15:57Z2017-09-11T09:44:16ZCDS support team

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

cds-question@unistra.frstellar-massesstellar-spectral-typesstellar-agesstellar-distanceeffective-temperatureinfrared-photometryDuring the Spitzer Space Telescope cryogenic mission, astronomers obtained Infrared Spectrograph (IRS) observations of hundreds of debris disk candidates that have been compiled in the Spitzer IRS Debris Disk Catalog (Chen et al. 2014, J/ApJS/211/25). We have discovered 10 and/or 20 {mu}m silicate emission features toward 120 targets in the catalog and modeled the IRS spectra of these sources, consistent with MIPS 70 {mu}m observations, assuming that the grains are composed of silicates (olivine, pyroxene, forsterite, and enstatite) and are located either in a continuous disk with power-law size and surface density distributions or thin rings that are well-characterized using two separate dust grain temperatures. For systems better fit by the continuous disk model, we find that (1) the dust size distribution power-law index is consistent with that expected from a collisional cascade, q=3.5-4.0, with a large number of values outside this range, and (2) the minimum grain size, a_min_, increases with stellar luminosity, L_*_, but the dependence of a_min_ on L_*_ is weaker than expected from radiation pressure alone. In addition, we also find that (3) the crystalline fraction of dust in debris disks evolves as a function of time with a large dispersion in crystalline fractions for stars of any particular stellar age or mass, (4) the disk inner edge is correlated with host star mass, and (5) there exists substantial variation in the properties of coeval disks in Sco-Cen, indicating that the observed variation is probably due to stochasticity and diversity in planet formation.2015ApJ...798...87Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/798/87CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/697/1578 : A debris disk study of Praesepe (Gaspar+, 2009)J/ApJ/705/1646 : Debris disks in Upper Sco (Carpenter+, 2009)J/ApJS/188/242 : Variations on debris disks. II. (Kenyon+, 2010)J/ApJ/738/122 : ScoCen debris disks Around F- and G-type stars (Chen+, 2011)J/ApJ/745/147 : Binaries among debris disk stars (Rodriguez+, 2012)J/ApJ/756/133 : ScoCen debris disks around B- and A-type stars (Chen+, 2012)J/ApJ/768/25 : Spitzer and Herschel observations of debris disksJ/ApJS/211/25 : Spitzer/IRS debris disk catalog. I. (Chen+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/798/87https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/798/87http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/798/87https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/798/87https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/798/87http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/798/87GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/798/87/table1 (Stellar Properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/798/87/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/798/87/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/798/87/table1?GETtext/xml+votable180.050000true8.1829406-63.03150110.0055555555555555566/460 691 1728 2170 2370 3249 3338 4018 4277 5645 8687 15946 16104 19598 19817 20530 20658 21043 21083 21289 21388 21528 21788 22854 22980 23376 24318 24796 25056 25113 26145 27735 28737 28924 30114 31776 32087 32466 33508 33547 34054 34415 34823 36907 37012 37237 37816 38412 39183 40692 41130 41361 41446 41513 41607 41618 41632 41641 41643 41652 41704 41710 41759 41900 42072 42174 42424 42678 42684 42694 42711 42714 42730 42742 42903 42911 42941 42991 43017 43021 43029 43037 43055 43129 43139 43147 43150 43168 43197 43230 43246 43255 43276 43292 43298 43331 43358 43369 43372 43402 43435 43540 43564 43677 44044 44106 44139 44321 44352 44368 44371 44378 45746 47205 48651https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/798/87?format=asciiOpticalInfrareddefaultJ/ApJ/798/87/table1Stellar PropertiesSimbadNameSimbad column added by the CDSmeta.idcharAssocAssociation identifiermeta.id.parentcharSpTypeSpectral typesrc.spTypecharDist? Distancepcpos.distance;pos.galactocentricfloatnullablen_M*[a] Note on M* (2)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar's namemeta.id;meta.maincharn_Name[bce] Note on Name (1)meta.notecharM*Stellar masssolMassphys.massfloatTeff[4000/16000] Effective temperatureKphys.temperature.effectiveintL*? Stellar luminositysolLumphys.luminosityfloatnullableLIR/L*? Ratio of IR to total luminositiesphys.luminosity;arith.ratiodoublenullableAge[3/5670]? Stellar ageMyrtime.ageintnullablen_Assoc[d] Note on Assoc (3)meta.notecharr_AssocReference(s) on Assoc (see refs.dat file)meta.ref;pos.framecharBinary[Y N MB] Binary system ?meta.codecharSep? Binary separationAUpos.angDistancedoublenullabler_BinaryReference(s) on Binary (see refs.dat file)meta.ref;pos.framecharF10? 10 {mu}m band fluxmW.m**-2phot.flux.density;em.IR.8-15umdoublenullableS/N10? Signal-to-noise ratio of 10 {mu}m fluxstat.snrfloatnullableF2020 {mu}m band fluxmW.m**-2phot.flux.density;em.IR.15-30umdoubleS/N20? Signal-to-noise ratio of 20 {mu}m fluxstat.snrfloatnullable_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/ApJ/798/87/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNum[5/130] Reference numbermeta.id;meta.mainintAutAuthor's name(s)meta.bib.authorcharBibcodeReference bibcodemeta.bib.bibcodecharCommComment on referencemeta.ref;pos.framechar