J/other/OJAP/7.9ivo://CDS.VizieR/J/other/OJAP/7.93CDSEnnisA.I.Caso J.P.Bassino L.P.2025-10-01T06:29:29Z2025-09-15T12:19:10ZCDS support team

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

cds-question@unistra.frgalaxiesglobular-star-clustersinfrared-photometryvisible-astronomybroad-band-photometryWe present a wide-field study of the globular cluster systems (GCS) of the elliptical galaxy NGC 3640 and its companion NGC 3641, based on observations from Gemini Multi-Object Spectrograph/Gemini using gri filters. NGC 3640 is a shell galaxy which presents a complex morphology, which previous studies have indicated as the sign of a recent 'dry' merger, although whether its nearest neighbour could have influenced these substructures remains an open question. In this work, we trace the spatial distribution of the globular clusters (GCs) as well as their colour distribution, finding a potential bridge of red (metal-rich) GCs that connects NGC 3640 to its less massive companion, and signs that the blue (metal-poor) GCs were spatially disturbed by the event that created the shells. While NGC 3640 presents a typical bimodal colour distribution, the GCS attributed to NGC 3641 appears unimodal, with most GCs presenting an intermediate colour in comparison to those closer to its companion.2024OJAp....7E..93Ehttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/OJAP/7.93CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/OJAP/7.93https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/OJAP/7.93http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/OJAP/7.93https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/OJAP/7.93https://vizier.iucaa.in/viz-bin/votable?-source=J/other/OJAP/7.93http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/OJAP/7.93GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/other/OJAP/7.93/gcs3640 (Catalog of GC candidates associated to NGC 3640)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/OJAP/7.93/gcs3640?https://vizier.iucaa.in/viz-bin/conesearch/J/other/OJAP/7.93/gcs3640?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/OJAP/7.93/gcs3640?GETtext/xml+votable180.050000true170.26393824772773.29883871442780.005555555555555556Cone search capability for table J/other/OJAP/7.93/gcs3641 (Catalog of GC candidates associated to NGC 3641)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/OJAP/7.93/gcs3641?https://vizier.iucaa.in/viz-bin/conesearch/J/other/OJAP/7.93/gcs3641?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/OJAP/7.93/gcs3641?GETtext/xml+votable180.050000true170.2848991513183.21432379618360.0055555555555555566/27079https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/OJAP/7.93?format=asciiOpticalInfrareddefaultJ/other/OJAP/7.93/gcs3640Catalog of GC candidates associated to NGC 3640recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIndexIndexmeta.id;meta.mainintXcenterPosition in X axispixpos.cartesian.xdoubleYcenterPosition in Y axispixpos.cartesian.ydoublegmagiInstrumental g magnitudemagphot.mag;em.opt.BdoublermagiInstrumental r magnitudemagphot.mag;em.opt.RdoubleimagiInstrumental i magnitudemagphot.mag;em.opt.IdoublegshaSharpness of PSF fit in g magnitudestat.fit.paramdoublershaSharpness of PSF fit in r magnitudestat.fit.paramdoubleishaSharpness of PSF fit in i magnitudestat.fit.paramdoublegchi2Chi squared from PSF fit in g magnitudestat.fit.chi2doublerchi2Chi squared from PSF fit in r magnitudestat.fit.chi2doubleichi2Chi squared from PSF fit in i magnitudestat.fit.chi2doublee_gmagError in g magnitudemagstat.error;phot.magdoublee_rmagError in r magnitudemagstat.error;phot.magdoublee_imagError in i magnitudemagstat.error;phot.magdoublegmagStandard g magnitudemagphot.mag;em.opt.BdoublermagStandard r magnitudemagphot.mag;em.opt.RdoubleimagStandard i magnitudemagphot.mag;em.opt.IdoubleRad3640Distance to NGC 3640pixpos.angDistancedoubleRad3641Distance to NGC 3641pixpos.angDistancedoubleg-ig-i colour indexmagphot.colordoubleg-rg-r colour indexmagphot.color;em.opt.B;em.opt.Rdoubler-ir-i colour indexmagphot.color;em.opt.R;em.opt.IdoubleRAJ2000Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainJ/other/OJAP/7.93/gcs3641Catalog of GC candidates associated to NGC 3641recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIndexIndexmeta.id;meta.mainintXcenterPosition in X axispixpos.cartesian.xdoubleYcenterPosition in Y axispixpos.cartesian.ydoublegmagiInstrumental g magnitudemagphot.mag;em.opt.BdoublermagiInstrumental r magnitudemagphot.mag;em.opt.RdoubleimagiInstrumental i magnitudemagphot.mag;em.opt.IdoublegshaSharpness of PSF fit in g magnitudestat.fit.paramdoublershaSharpness of PSF fit in r magnitudestat.fit.paramdoubleishaSharpness of PSF fit in i magnitudestat.fit.paramdoublegchi2Chi squared from PSF fit in g magnitudestat.fit.chi2doublerchi2Chi squared from PSF fit in r magnitudestat.fit.chi2doubleichi2Chi squared from PSF fit in i magnitudestat.fit.chi2doublee_gmagError in g magnitudemagstat.error;phot.magdoublee_rmagError in r magnitudemagstat.error;phot.magdoublee_imagError in i magnitudemagstat.error;phot.magdoublegmagStandard g magnitudemagphot.mag;em.opt.BdoublermagStandard r magnitudemagphot.mag;em.opt.RdoubleimagStandard i magnitudemagphot.mag;em.opt.IdoubleRad3640Distance to NGC 3640pixpos.angDistancedoubleRad3641Distance to NGC 3641pixpos.angDistancedoubleg-ig-i colour indexmagphot.colordoubleg-rg-r colour indexmagphot.color;em.opt.B;em.opt.Rdoubler-ir-i colour indexmagphot.color;em.opt.R;em.opt.IdoubleRAJ2000Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.main