J/ApJ/770/7ivo://CDS.VizieR/J/ApJ/770/7doi:10.26093/cds/vizier.17700007CDSMasiero J.R.Mainzer A.K.Bauer J.M.Grav T.Nugent C.R.Stevenson R.2017-10-03T05:12:33Z2015-01-19T12:43:03ZCDS support team

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

cds-question@unistra.frasteroidsinfrared-sourcessurveysUsing albedos from WISE/NEOWISE to separate distinct albedo groups within the Main Belt asteroids, we apply the Hierarchical Clustering Method to these subpopulations and identify dynamically associated clusters of asteroids. While this survey is limited to the ~35% of known Main Belt asteroids that were detected by NEOWISE, we present the families linked from these objects as higher confidence associations than can be obtained from dynamical linking alone. We find that over one-third of the observed population of the Main Belt is represented in the high-confidence cores of dynamical families. The albedo distribution of family members differs significantly from the albedo distribution of background objects in the same region of the Main Belt; however, interpretation of this effect is complicated by the incomplete identification of lower-confidence family members. In total we link 38298 asteroids into 76 distinct families. This work represents a critical step necessary to debias the albedo and size distributions of asteroids in the Main Belt and understand the formation and history of small bodies in our solar system.2013ApJ...770....7Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/770/7CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/569/A122 : Main-belt asteroids polarimetry. IV (Gil-Hutton+, 2014)J/ApJ/760/L12 : WISE/NEOWISE NEOs preliminary thermal fits (Mainzer+, 2012)J/ApJ/759/L8 : WISE/NEOWISE obs. of main belt asteroids (Masiero+, 2012)J/ApJ/759/49 : WISE/NEOWISE Jovian Trojan asteroids: taxonomy (Grav+, 2012)J/ApJ/744/197 : WISE/NEOWISE observations of Hilda asteroids (Grav+, 2012)J/ApJ/743/156 : NEOWISE obs. of NEOs: preliminary results (Mainzer+, 2011)J/ApJ/742/40 : Jovian Trojans asteroids with WISE/NEOWISE (Grav+, 2011)J/ApJ/741/68 : Main Belt asteroids with WISE/NEOWISE. I. (Masiero+, 2011)J/A+A/529/A86 : Polarimetric survey of main-belt asteroids (Gil-Hutton+, 2011)http://hamilton.dm.unipi.it/astdys/index.php : AstDyS-2, Asteroids Dynamic Sitehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/770/7https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/770/7http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/770/7https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/770/7https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/770/7http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/770/7GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfrareddefaultJ/ApJ/770/7/table2Orbital elements, median and maximum diameters, average albedos, and raw SFD slopes ({alpha}) for observed asteroid familiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNfam[3/24649] ID number of familymeta.idintprimaryNameName of familymeta.id;meta.maincharf_Name[*] *: ambiguous parent bodies (1)meta.codecharVlink[55/130] The HCM (Hierarchical Clustering Method) velocity the family was extracted atm/sphys.velocinta[1.9/3.5] Median proper semimajor axisAUpos.pm;phys.size.smajAxis;stat.medianfloate[0.01/0.3] Median eccentricitysrc.orbital.eccentricityfloati[0.6/27] Median inclinationdegsrc.orbital.inclination;stat.medianfloatDmax[5.9/469] Diameter of the largest bodykmphys.size.diameterfloatDmed[1.6/10.3] Median diameterkmphys.size.diameter;stat.medianfloatpV[0/0.8] Average visible geometric albedophys.albedofloate_pV[0.01/0.2] Error in pVstat.errorfloatalpha[-5.2/-1.4] Raw size-frequency distribution (SFD) slope {alpha}_SFD_ (N{prop.to}D^{alpha}^)stat.fit.paramfloate_alpha[0.01/1.5] alpha uncertaintystat.error;pos.eq.rafloatN[40/5718] Number of linked family membersmeta.numberintJ/ApJ/770/7/table3Orbital and physical parameters for Main Belt asteroids associated with dynamical familiesNameSimbad column added by the CDSmeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMPCAsteroid name in MPC formatmeta.idchara[1.9/3.6] Semimajor axisAUphys.size.smajAxisfloate[0.005/0.3] Eccentricitysrc.orbital.eccentricityfloati[0.3/28] Inclinationdegsrc.orbital.inclinationfloatD[0.9/469] Infrared-measured diameterkmphys.size.diameterfloate_DError in Diamkmstat.errorfloatpV[0.004/1] Visible geometric albedophys.albedofloate_pVError in pVstat.errorfloatNfamID number of family parentmeta.id.parentint