J/AJ/155/44ivo://CDS.VizieR/J/AJ/155/44doi:10.26093/cds/vizier.51550044CDSPanwar N.Pandey A.K.Samal M.R.Battinelli P.Ogura K.Ojha D.K.,Chen W.P.Singh H.P.2018-12-03T14:46:47Z2018-10-03T12:32:34ZCDS support team

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

cds-question@unistra.fropen-star-clusterspre-main-sequence-starsinfrared-photometryvisible-astronomyphotometrystellar-massesstellar-agesBerkeley 59 is a nearby (~1 kpc) young cluster associated with the Sh2-171 H II region. We present deep optical observations of the central ~2.5x2.5 pc^2^ area of the cluster, obtained with the 3.58 m Telescopio Nazionale Galileo. The V/(V-I) color-magnitude diagram manifests a clear pre-main-sequence (PMS) population down to ~0.2 M_{sun}_. Using the near-infrared and optical colors of the low-mass PMS members, we derive a global extinction of A_V_=4 mag and a mean age of ~1.8 Myr, respectively, for the cluster. We constructed the initial mass function and found that its global slopes in the mass ranges of 0.2-28 M_{sun}_ and 0.2-1.5 M_{sun}_ are -1.33 and -1.23, respectively, in good agreement with the Salpeter value in the solar neighborhood. We looked for the radial variation of the mass function and found that the slope is flatter in the inner region than in the outer region, indicating mass segregation. The dynamical status of the cluster suggests that the mass segregation is likely primordial. The age distribution of the PMS sources reveals that the younger sources appear to concentrate close to the inner region compared to the outer region of the cluster, a phenomenon possibly linked to the time evolution of star-forming clouds. Within the observed area, we derive a total mass of ~10^3^ M_{sun}_ for the cluster. Comparing the properties of Berkeley 59 with other young clusters, we suggest it resembles more closely the Trapezium cluster.2018AJ....155...44Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/155/44CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/other/BASI/35.53 : JH photometry of Berkeley 59 (Sharma+, 2007)J/MNRAS/383/1241 : UBVIc photometry of cluster Berkeley 59 (Pandey+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/155/44https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/155/44http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/155/44https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/155/44https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/155/44http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/155/44GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/155/44/table3 (Magnitudes, mass and age of the PMS stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/155/44/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/155/44/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/155/44/table3?GETtext/xml+votable180.050000true0.66887567.343696940.0055555555555555566/37552.0116747215455118e-19 4.1449378197061754e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/155/44?format=asciiInfraredOpticaldefaultJ/AJ/155/44/table3Magnitudes, mass and age of the PMS starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/420] Internal index numbermeta.idintRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainVmag[17.14/24.05] TNG/DOLORES apparent V band magnitudemagphot.mag;em.opt.Vfloate_Vmag[0/0.11] Uncertainty in Vmagmagstat.error;phot.mag;em.opt.VfloatImag[14.13/19.55] TNG/DOLORES apparent I band magnitudemagphot.mag;em.opt.Ifloate_Imag[0.01/0.21] Uncertainty in Imagmagstat.error;phot.mag;em.opt.IfloatMass[0.16/2.24] Stellar masssolMassphys.massfloate_Mass[0/1.07] Uncertainty in MasssolMassstat.error;phys.massfloatAge[0.1/5] Stellar ageMyrtime.agefloate_Age[0/0.56] Uncertainty in AgeMyrstat.error;time.agefloat