J/A+A/591/A14ivo://CDS.VizieR/J/A+A/591/A14doi:10.26093/cds/vizier.35910014CDSAli-Lagoa V.Licandro J.Gil-Hutton R.Canada-Assandri M.Delbo M.,de Leon J.Campins H.Pinilla-Alonso N.Kelley M.S.P.Hanus J.2017-12-12T14:44:35Z2016-06-03T08:00:01ZCDS support team

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

cds-question@unistra.frasteroidsinfrared-photometrygalaxy-classification-systemsB-type asteroids constitute a peculiar spectral class within the C-complex. Previous work has pointed out the difference between the visible geometric albedos of B-types and those of the Pallas collisional family (PCF), whose few members with observed spectra are B-types (one exception out of eight objects). This has been interpreted as being due to compositional differences. However, the PCF members are typically smaller than the spectroscopically classified B-types, and the following possibilities have not been ruled out: the albedo differences might be related to a size-albedo dependence and/or to the generally larger errors of the WISE data and best-fitting values of the derived parameters expected for smaller objects. We compare albedos and beaming parameters of PCF members and B-types of similar sizes and re-examine our conclusion on the different composition of the PCF. By modelling their WISE/NEOWISE data, we derived sizes and albedos of all objects whose Sloan Digital Sky Survey reflectances are similar to the typical B-type reflectance spectra. In particular, we derived the so-called infrared beaming parameters (eta), effective diameters (D), and corresponding visible geometric albedos (pV), and studied their value distributions.2016A&A...591A..14Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/591/A14CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/astorb : Orbits of Minor Planets (Bowell+ 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/591/A14https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/591/A14http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/591/A14https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/591/A14https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/591/A14http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/591/A14GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfraredOpticaldefaultJ/A+A/591/A14/table1*Best-fitting values of size and infrared beaming parameter and corresponding geometric visible albedos for our objectsAstorbSimbad column added by the CDSmeta.idcharGSlope parameter (MPC)arith.grad;stat.paramfloatdAsteroid designation (MPC-packed format)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHAsteroid absolute magnitude (MPC)magphys.magAbs;em.IR.HfloatDEquivalent diameterkmphys.angSizefloatpVVisible geometric albedophys.albedofloatetaInfrared beaming parameterstat.fit.paramfloatW3Number of data fitted in band W3meta.numberintW4Number of data fitted in band W4meta.numberintrAverage heliocentric distanceAUpos.distance;pos.heliocentric;stat.meanfloatgAverage geocentric distanceAUpos.distance;pos.geocentric;stat.meanfloataAverage phase angledegsrc.orbitalfloatLGroup label (PCF, SpecB or SDSSB)src.classchar