J/A+A/708/A378ivo://CDS.VizieR/J/A+A/708/A378CDSCaceres C.Minniti D.Mejias A.Gomez M.Alonso-Garcia J.Ivanov V.D.,Pullen J.B.Saito R.K.Smith L.C.Solano E.Beamin J.C.Rojas-Bozza D.,Soto P.Zelada R.2026-05-19T14:14:26Z2026-04-24T09:22:17ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsThe recent discovery of free-floating planets (FFPs) in nearby young stellar associations suggests that these objects might be common in the Galaxy. Our search for FFPs in the young Lower Centaurus-Crux Association (LCC) using the VISTA Variables in the Via Lactea VVV and VVVX surveys revealed several candidates with distances d<200pc. The main goal of the paper is to identify binary FFPs among this sample. The presence of such binaries is useful to contrast two different main formation scenarios: the formation in the circumstellar disk of the parent star with subsequent ejection by dynamical interactions and the in-situ formation by gravitational collapse of a protostellar cloud. We use the Gaia, VVV, VVVX, and DECaPS databases to identify pairs of low-mass objects in the LCC association sharing common proper motions. We examine the optical and near-IR color-magnitude and color-color diagrams, and visually confirm the detections in the available optical and near-IR images. We find 17 young low-mass binaries in the LCC association, with distances starting from 68pc and projected separations ranging from 88au to 6742au. A couple of candidates have additional faint companions that need confirmation to secure them as triple systems. Adopting an age of 17Myr for the LCC association, we find that 14 of the components are faint enough to have planetary masses. Our results indicate that binaries represent >~2% of the population of FFPs in the LCC association, and suggest that their preferred formation mechanism is the gravitational collapse independent of a star. Also, many of the recently discovered FFPs in LCC may be unresolved giant binary planets. The wide range of colors and flux reversals observed suggests that the existence of clouds in their atmospheres is important and points to continuity with the BD populations.2026A&A...708A.378Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/708/A378CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/708/A378https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/708/A378http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/708/A378https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/708/A378https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/708/A378http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/708/A378GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/708/A378/table1 (Identifications, astrometry, and photometry of the candidates binary FFPs in LCC)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/708/A378/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/708/A378/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/708/A378/table1?GETtext/xml+votable180.050000true197.95471667-58.549866190.0055555555555555566/37916 41567 41584 41586 41590 41592-41593 41623 41675 41708 41749 41762 43033 430801.398457827073138e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/708/A378?format=asciidefaultJ/A+A/708/A378/table1Identifications, astrometry, and photometry of the candidates binary FFPs in LCCrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVVV-FFPID of objectmeta.idcharGaiaDR3Gaia DR3 IDmeta.id;meta.mainRAJ2000Gaia DR3 Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Gaia DR3 Declination (J2000)degpos.eq.dec;meta.mainplxGaia DR3 parallaxmaspos.parallax.trigfloate_plxGaia DR3 parallax errormasstat.error;pos.parallaxfloatpmRAGaia DR3 proper motion in RAmas/yrpos.pm;pos.eq.rafloate_pmRAGaia DR3 proper motion in RA errormas/yrstat.error;pos.pm;pos.eq.rafloatpmDEGaia DR3 proper motion in DECmas/yrpos.pm;pos.eq.decfloate_pmDEGaia DR3 proper motion in DEC errormas/yrstat.error;pos.pm;pos.eq.decfloatruweGaia DR3 ruwemagstat.errorfloatGmagGaia DR3 G magnitudemagphot.mag;em.optfloatG-RP? Gaia DR3 (G - GRP) colormagphot.color;em.opt;em.optfloatnullableBP-RP? Gaia DR3 (GBP-GRP) colormagphot.color;em.opt.B;em.opt.RfloatnullableJmagVVV/X J magnitudemagphot.mag;em.IR.JfloatJ-KsVVV/X (J-Ks) colormagphot.color;em.IR.J;em.IR.KfloatDistDistancepcpos.distanceintl_MassLimit flag on Massmeta.code.error;phys.masscharMassEstimated mass(1.898187x10+27kg)phys.massfloatAngSepAngular separationarcsecpos.angDistancefloatProjSepProjected separationAUpos.angDistanceintBindEBinding energy of system1e-07Wphys.energydouble