J/A+A/417/961ivo://CDS.VizieR/J/A+A/417/961doi:10.26093/cds/vizier.34170961CDSBaume G.Moitinho A.Giorgi E.E.Carraro G.Vazquez R.A.2004-06-27T21:32:57Z2004-06-27T21:32:43ZCDS support team

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

cds-question@unistra.fropen-star-clustersinfrared-photometryvisible-astronomybroad-band-photometryWe present CCD broad band photometric observations in the fields of the Third Galactic Quadrant open clusters NGC 2580 and NGC 2588 (V(I)c and UBV(RI)c respectively). From the analysis of our data we found that NGC 2580 is located at a distance of about 4kpc and its age is close to 160Myr. As for NGC 2588, it is placed at about 5kpc from the Sun and is 450Myr old. This means that NGC 2588 belongs to the extension of the Perseus arm, whereas NGC 2580 is closer to the local arm structure. The luminosity functions (LFs) have been constructed for both clusters down to V~20 together with their initial mass functions (IMFs) for stars with masses above M~1-1.5M_{sun}_. The IMF slopes for the most massive bins yielded values of x~1.3 for NGC 2580 and x~2 for NGC 2588. In the case of this latter cluster we found evidence of a core-corona structure produced probably by dynamical effect. In the main sequences of both clusters we detected gaps, which we suggest could be real features.2004A&A...417..961Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/417/961CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)I/259 : The Tycho-2 Catalogue (Hog+ 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/417/961https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/417/961http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/417/961https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/417/961https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/417/961http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/417/961GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/417/961/table3a (Photometric catalogue of the NGC 2580 region)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/417/961/table3a?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/417/961/table3a?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/417/961/table3a?GETtext/xml+votable180.050000true125.315-30.3164170.005555555555555556Cone search capability for table J/A+A/417/961/table3b (Photometric catalogue of the NGC 2588 region)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/417/961/table3b?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/417/961/table3b?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/417/961/table3b?GETtext/xml+votable180.050000true125.737083-32.9073060.0055555555555555566/39413 40104-40105https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/417/961?format=asciiOpticalInfrareddefaultJ/A+A/417/961/table3aPhotometric catalogue of the NGC 2580 regionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqIdentification number (this work)meta.idintXposX position in arcseconds (1)pixpos.cartesian.x;instr.detfloatYposY position in arcseconds (1)pixpos.cartesian.y;instr.detfloatRA2000Right Ascension (2000)pos.eq.ra;meta.mainDE2000Declination (2000)pos.eq.dec;meta.mainVmagV magnitudemagphot.mag;em.opt.Vfloatu_VmagComments for V magnitude (G1)meta.code.errorcharV-Ic? V-Ic colour indexmagphot.color;em.opt.V;em.opt.Ifloatnullableu_V-IcComments for V-Ic index (G1)meta.code.errorcharMembMembership assignment (G2)meta.code.memberchar2MASS2MASS designation (JHHMMSSss-DDMMSS)meta.id.crosscharTYCTYCHO-2 identification (TYC FFFF-NNNNN-N)meta.id.crosscharJ/A+A/417/961/table3bPhotometric catalogue of the NGC 2588 regionVmagV magnitudemagphot.mag;em.opt.VfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqIdentification number (this work)meta.idintXposX position in arcseconds (1)pixpos.cartesian.x;instr.detfloatYposY position in arcseconds (1)pixpos.cartesian.y;instr.detfloatRA2000Right Ascension (2000)pos.eq.ra;meta.mainDE2000Declination (2000)pos.eq.dec;meta.mainu_VmagComments for V magnitude (G1)meta.code.errorcharB-V? B-Vc colour indexmagphot.color;em.opt.B;em.opt.Vfloatnullableu_B-VComments for B-V index (G1)meta.code.errorcharU-B? U-Bc colour indexmagphot.color;em.opt.U;em.opt.Bfloatnullableu_U-BComments for U-B index (G1)meta.code.errorcharV-Rc? V-Rc colour indexmagphot.color;em.opt.V;em.opt.Rfloatnullableu_V-RcComments for V-Rc index (G1)meta.code.errorcharV-Ic? V-Ic colour indexmagphot.color;em.opt.V;em.opt.Ifloatnullableu_V-IcComments for V-Ic index (G1)meta.code.errorcharMembMembership assignment (G2) (2)meta.code.memberchar2MASS2MASS designation (JHHMMSSss-DDMMSS)meta.id.crosscharTYCTYCHO-2 identification (TYC FFFF-NNNNN-N)meta.id.crosschar