J/ApJ/734/51ivo://CDS.VizieR/J/ApJ/734/51doi:10.26093/cds/vizier.17340051CDSOliveira I.Olofsson J.Pontoppidan K.M.van Dishoeck E.F.,Augereau J.-C.Merin B.2018-01-04T08:22:29Z2013-01-04T08:04:07ZCDS support team

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

cds-question@unistra.frchemical-abundancesmolecular-cloudsyoung-stellar-objectsMineralogical studies of silicate features emitted by dust grains in protoplanetary disks and solar system bodies can shed light on the progress of planet formation. The significant fraction of crystalline material in comets, chondritic meteorites, and interplanetary dust particles indicates a modification of the almost completely amorphous interstellar medium dust from which they formed. The production of crystalline silicates, thus, must happen in protoplanetary disks, where dust evolves to build planets and planetesimals. Different scenarios have been proposed, but it is still unclear how and when this happens. This paper presents dust grain mineralogy (composition, crystallinity, and grain size distribution) of a complete sample of protoplanetary disks in the young Serpens cluster. These results are compared to those in the young Taurus region and to sources that have retained their protoplanetary disks in the older Upper Scorpius and {eta} Chamaeleontis stellar clusters, using the same analysis technique for all samples. This comparison allows an investigation of the grain mineralogy evolution with time for a total sample of 139 disks. The mean cluster age and disk fraction are used as indicators of the evolutionary stage of the different populations. Our results show that the disks in the different regions have similar distributions of mean grain sizes and crystallinity fractions (~10%-20%) despite the spread in mean ages. Furthermore, there is no evidence of preferential grain sizes for any given disk geometry nor for the mean cluster crystallinity fraction to increase with mean age in the 1-8Myr range. The main implication is that a modest level of crystallinity is established in the disk surface early on (<=1Myr), reaching an equilibrium that is independent of what may be happening in the disk midplane. These results are discussed in the context of planet formation, in comparison with mineralogical results from small bodies in our own solar system.2011ApJ...734...51Ohttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/734/51CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/720/480 : DISCS. I. Taurus protoplanetary disk data (Oberg+, 2010)J/ApJ/714/778 : YSOs in the Serpens Molecular Cloud (Oliveira+, 2010)J/ApJ/691/672 : YSOs in Serpens molecular cloud (Oliveira+ 2009)J/ApJ/703/1964 : Spectra of three nearby star-forming regions (Furlan+, 2009)J/ApJ/669/493 : Spitzer/Chandra YSOs in Serpens cloud core (Winston+, 2007)J/ApJ/651/L49 : Upper Sco OB association IRAC observations (Carpenter+, 2006)J/ApJ/636/1098 : Debris disks around solar-type stars (Bryden+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/734/51https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/734/51http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/734/51https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/734/51https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/734/51http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/734/51GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/734/51/table5 (Dust composition derived using the "B2C" procedure)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/734/51/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/734/51/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/734/51/table5?GETtext/xml+votable180.050000true276.9742917-0.04263890.0055555555555555565/270 292 7590 6/1029 1031 1037 1039 1040 1048 1050 1051 1052 1053 1054 1063 1073 1074 1075 1111 1114 1115 1123 1124 1136 1156 1159 1176 23548 23549 24201 24203 24299 24300 30366 37012 42990 44366 44378 44379 44389 44401https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/734/51?format=asciiOpticaldefaultJ/ApJ/734/51/table5Dust composition derived using the "B2C" procedureSimbadNameSimbad column added by the CDSmeta.idchare_Sil0.1Negative error on Sil0.1%stat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClStar-forming region designation (1)meta.id.parentcharIDLow-mass star identification (2)meta.id;meta.maincharm_ID[cw] c: cold or w: warm component (3)meta.code.multipcharSpTMK spectral typesrc.spTypecharOP0.1Combined amorphous olivine and pyroxene relative abundance at 0.1um%phys.abundfloatE_OP0.1Positive error on OP0.1%stat.error;stat.maxfloate_OP0.1Negative error on OP0.1%stat.errorfloatEns0.1Crystalline enstatite relative abundance at 0.1um%phys.abundfloatE_Ens0.1Positive error on Ens0.1%stat.error;stat.maxfloate_Ens0.1Negative error on Ens0.1%stat.errorfloatFor0.1Forsterite relative abundance at 0.1um%phys.abundfloatE_For0.1Positive error on For0.1%stat.error;stat.maxfloate_For0.1Negative error on For0.1%stat.errorfloatSil0.1Amorphous silica relative abundance at 0.1um%phys.abundfloatE_Sil0.1Positive error on Sil0.1%stat.error;stat.maxfloatOP1.5Combined amorphous olivine and pyroxene relative abundance at 1.5um%phys.abundfloatl_E_OP1.5Limit flag on E_OP1.5meta.code.errorcharE_OP1.5Positive error on OP1.5%stat.error;stat.maxfloate_OP1.5Negative error on OP1.5%stat.errorfloatEns1.5Crystalline enstatite relative abundance at 1.5um%phys.abundfloatE_Ens1.5Positive error on Ens1.5%stat.error;stat.maxfloate_Ens1.5Negative error on Ens1.5%stat.errorfloatFor1.5Forsterite relative abundance at 1.5um%phys.abundfloatE_For1.5Positive error on For1.5%stat.error;stat.maxfloate_For1.5Negative error on For1.5%stat.errorfloatSil1.5Amorphous silica relative abundance at 1.5um%phys.abundfloatl_E_Sil1.5Limit flag on E_Sil1.5meta.code.errorcharE_Sil1.5Positive error on Sil1.5%stat.error;stat.maxfloate_Sil1.5Negative error on Sil1.5%stat.errorfloatOP6.0Combined amorphous olivine and pyroxene relative abundance at 6.0um%phys.abundfloatE_OP6.0Positive error on OP6.0%stat.error;stat.maxfloate_OP6.0Negative error on OP6.0%stat.errorfloatSil6.0Amorphous silica relative abundance at 6.0um%phys.abundfloatE_Sil6.0Positive error on Sil6.0%stat.error;stat.maxfloate_Sil6.0Negative error on Sil6.0%stat.errorfloat_RAPositions from SIMBAD database (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD database (declination part)degpos.eq.dec;meta.main