J/MNRAS/457/1028ivo://CDS.VizieR/J/MNRAS/457/1028doi:10.26093/cds/vizier.74571028CDSSheikhi N.Hasheminia M.Khalaj P.Haghi H.Zonoozi A.H.Baumgardt H.2024-08-15T20:17:47Z2017-01-03T14:44:22ZCDS support team

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

cds-question@unistra.fropen-star-clustersproper-motionsinfrared-photometrystellar-massesWe have obtained membership probabilities of stars within a field of from the centre of the open cluster alpha Persei using proper motions and photometry from the PPMXL and Wide-field Infrared Survey Explorer catalogues. We have identified 810 possible stellar members of alpha Persei. We derived the global and radial present-day mass function (MF) of the cluster and found that they are well matched by two-stage power-law relations with different slopes at different radii. The global MF of alpha Persei shows a turnover at m=0.62M_{sun}_ with low- and high-mass slopes of {alpha}_low_=0.50+/-0.09 (0.1<m/M_{sun}_<0.62) and {alpha}_high_=2.32+/-0.14 (0.62<=m/M_{sun}_<4.68), respectively. The high-mass slope of the cluster increases from 2.01 inside 110 to 2.63 outside 22, whereas the mean stellar mass decreases from 0.95 to 0.57M_{sun}_ in the same regions, signifying clear evidence of mass segregation in the cluster. From an examination of the high-quality colour-magnitude data of the cluster and performing a series of Monte Carlo simulations, we obtained a binary fraction of fbin=34+/-12 per cent for stars with 0.70<m/M_{sun}_<4.68. This is significantly larger than the observed binary fraction, indicating that this open cluster contains a large population of unresolved binaries. Finally, we corrected the MF slopes for the effect of unresolved binaries and found low- and high-mass slopes of {alpha}_low_=0.89+/-0.11 and {alpha}_high_=2.37+/-0.09 and a total cluster mass of 352M_{sun}_ for alpha Persei.2016MNRAS.457.1028Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/457/1028CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/317 : The PPMXL Catalog (Roeser+ 2010)II/311 : WISE All-Sky Data Release (Cutri+ 2012)J/A+A/416/125 : RI photometry in alpha Per and Pleiades (Deacon+, 2004)J/MNRAS/426/3403 : UKIDSS-GCS {alpha} Per members (Lodieu+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/457/1028https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/457/1028http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/457/1028https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/457/1028https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/457/1028http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/457/1028GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/457/1028/table2 (Celestial coordinates, proper motions, magnitudes and the masses of the possible members of alpha Persi as found by this study, sorted by right ascension from PPMXL)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/457/1028/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/457/1028/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/457/1028/table2?GETtext/xml+votable180.050000true48.6329988949.3330.0055555555555555565/431 442 773 784-786 6/1719 1762-1763 1766 1772 1774-1775 3089 3100-3101 3103 31487.952274030004205e-20 1.7798557115773645e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/457/1028?format=asciiInfrareddefaultJ/MNRAS/457/1028/table2Celestial coordinates, proper motions, magnitudes and the masses of the possible members of alpha Persi as found by this study, sorted by right ascension from PPMXLSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainJmagJ magnitudemagphot.mag;em.IR.JfloatKsmagKs magnitudemagphot.mag;em.IR.Kfloate_Jmagrms uncertainty on Jmagmagstat.error;phot.mag;em.IR.Jfloate_Ksmagrms uncertainty on Ksmagmagstat.error;phot.mag;em.IR.KfloatpmRAProper motion in RA, pmRA*cos(DE)mas/yrpos.pm;pos.eq.rafloatpmDEProper Motion in DEmas/yrpos.pm;pos.eq.decfloate_pmRArms uncertainty on pmRAmas/yrstat.error;pos.pm;pos.eq.rafloate_pmDErms uncertainty on pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatMassStellar mass derived from the J magnitude using a PARSEC isochornesolMassphys.massfloatNote[DLB -] Note (1)meta.notecharPPMXLDisplay the PPMXL data (Roeser et al. 2010, Cat. I/317)meta.ref.urlchar