J/A+A/684/A69ivo://CDS.VizieR/J/A+A/684/A69doi:10.26093/cds/vizier.36840069CDSGratton R.Bonavita M.Mesa D.Zurlo A.Marino S.Desidera S.,D'Orazi V.Rigliaco E.Squicciarini V.Nogueira P.H.2024-11-07T20:02:49Z2024-07-18T15:44:37ZCDS support team

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

cds-question@unistra.frstellar-associationsinfrared-photometryeffective-temperaturestellar-massesDynamical masses of young planets aged between 10 and 200Myr detected in imaging play a crucial role in shaping models of giant planet formation. Regrettably, only a few such objects possess these characteristics. Furthermore, the evolutionary pattern of young sub-stellar companions in near-infrared colour-magnitude diagrams might diverge from free-floating objects, possibly due to differing formation processes. The recent identification of a giant planet around AF Lep, part of the beta Pic moving group (BPMG), encouraged us to re-examine these points. We considered updated dynamical masses and luminosities for the sub-stellar objects in the BPMG. In addition, we compared the properties of sub-stellar companions and free-floating objects in the BPMG and other young associations remapping the positions of the objects in the colour-magnitude diagram into a dustiness-temperature plane. We found that cold-start evolutionary models do not reproduce the mass-luminosity relation for sub-stellar companions in the BPMG. This aligns rather closely with predictions from 'hot start' scenarios and is consistent with recent planet formation models. We obtain rather good agreement with masses from photometry and the remapping approach compared to actual dynamical masses. We also found a strong suggestion that the near-infrared colour-magnitude diagram for young companions is different from that of free-floating objects belonging to the same young associations. If confirmed by further data, this last result would imply that cloud settling - which likely causes the transition between L and T spectral type - occurs at a lower effective temperature in young companions than in free-floating objects. This might tentatively be explained with a different chemical composition.2024A&A...684A..69Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/684/A69CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/583/A85 : Binaries in beta Pic moving group (Alonso-Floriano+, 2015)J/AJ/140/119 : {beta} Pic and AB Dor moving groups members (Schlieder+, 2010)J/AJ/143/80 : Low-mass stars of beta Pic and AB Dor groups (Schlieder+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/684/A69https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/684/A69http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/684/A69https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/684/A69https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/684/A69http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/684/A69GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap7.952274030004205e-20 1.7798557115773645e-19InfrareddefaultJ/A+A/684/A69/tablea1Photometry for sub-stellar objects in the BPMGSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCodeCode (G1)meta.codecharNameNamemeta.id;meta.maincharPmembMembership probability%statfloatplxPhotometric parallaxmaspos.parallax.photfloatJmag? J magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? J magnitude errormagstat.error;phot.magfloatnullableHmag? H magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? H magnitude errormagstat.error;phot.magfloatnullableKmag? K magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag? K magnitude errormagstat.error;phot.magfloatnullableJMAG? Absolute J magnitudemagphys.magAbsfloatnullablee_JMAG? Absolute J magnitude errormagstat.errorfloatnullableHMAG? Absolute H magnitudemagphys.magAbsfloatnullablee_HMAG? Absolute H magnitude errormagstat.errorfloatnullableKMAG? Absolute K magnitudemagphys.magAbsfloatnullablee_KMAG? Absolute K magnitude errormagstat.errorfloatnullableJ-K? J-K colour indexmagphot.color;em.IR.J;em.IR.Kfloatnullablee_J-K? J-K colour index errormagstat.error;phot.color;em.IR.JfloatnullableRefReference, in refs.dat filemeta.ref;pos.frame;meta.filecharJ/A+A/684/A69/tablea2Photometry for sub-stellar objects in other young moving groupsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGroupMoving group namemeta.idcharNameNamemeta.id;meta.maincharPmemb? Membership probability%statfloatnullableplxPhotometric parallaxmaspos.parallax.photfloatJmag? J magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? J magnitude errormagstat.error;phot.magfloatnullableHmag? H magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? H magnitude errormagstat.error;phot.magfloatnullableKmag? K magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag? K magnitude errormagstat.error;phot.magfloatnullableJMAG? Absolute J magnitudemagphys.magAbsfloatnullablee_JMAG? Absolute J magnitude errormagstat.errorfloatnullableHMAG? Absolute H magnitudemagphys.magAbsfloatnullablee_HMAG? Absolute H magnitude errormagstat.errorfloatnullableKMAG? Absolute K magnitudemagphys.magAbsfloatnullablee_KMAG? Absolute K magnitude errormagstat.errorfloatnullableJ-K? J-K colour indexmagphot.color;em.IR.J;em.IR.Kfloatnullablee_J-K? J-K colour index errormagstat.error;phot.color;em.IR.JfloatnullableRefReference, in refs.dat filemeta.ref;pos.frame;meta.filecharNote[b] b Binarymeta.notecharJ/A+A/684/A69/tableb1Masses of sub-stellar objects with ages in the range 10-200Myr derived using AMES modelsSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCodeCode (G1)meta.codecharNameNamemeta.id;meta.maincharAgeAgeGyrtime.ageintTeff1? Effective temperature (BC)Kphys.temperature.effectiveintnullablee_Teff1? Effective temperature (BC) errorKstat.errorintnullableTeff2Effective temperature (remap)Kphys.temperature.effectiveinte_Teff2Effective temperature (remap) errorKstat.errorintrr parameter (1)phot.mag;em.opt.Rfloate_rr parameter errorstat.errorfloatMassMass(1.898187x10+27kg)phys.massfloate_MassMass error(1.898187x10+27kg)stat.error;phys.massfloatJ/A+A/684/A69/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codemeta.notecharBibCoeBibCodemeta.bib.bibcodecharComCommentsmeta.notechar