J/AJ/143/46ivo://CDS.VizieR/J/AJ/143/46doi:10.26093/cds/vizier.51430046CDSNegueruela I.Marco A.2017-06-26T11:50:05Z2013-04-23T13:23:46ZCDS support team

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

cds-question@unistra.fropen-star-clustersvisible-astronomybroad-band-photometrystellar-spectral-typesastronomical-object-identificationWe present UBV photometry of the highly reddened and poorly studied open cluster Berkeley 55 (= C 2115+515), revealing an important population of B-type stars and several evolved stars of high luminosity. Intermediate-resolution far-red spectra of several candidate members confirm the presence of one F-type supergiant and six late supergiants or bright giants. The brightest blue stars are mid-B giants. Spectroscopic and photometric analyses indicate an age 50+/-10Myr. The cluster is located at a distance d~4kpc, consistent with other tracers of the Perseus Arm in this direction. Berkeley 55 is thus a moderately young open cluster with a sizable population of candidate red (super)giant members, which can provide valuable information about the evolution of intermediate-mass stars.2012AJ....143...46Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/143/46CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)III/217 : Atlas of 840-880nm spectral region (Andrillat+ 1995-1997)III/150 : Perkins Revised MK Types for the Cooler Stars (Keenan+ 1989)J/MNRAS/389/285 : Proper motions & JHK of 24 Berkeley clusters (Tadross, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/143/46https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/143/46http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/143/46https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/143/46https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/143/46http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/143/46GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/143/46/stars (Photometry and 2MASS identifications of all stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/143/46/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/143/46/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/143/46/stars?GETtext/xml+votable180.050000true319.327053651.79059890.0055555555555555566/154343.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/143/46?format=asciiOpticaldefaultJ/AJ/143/46/starsPhotometry and 2MASS identifications of all starsSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/237] Star number (<[NM2012] NNN> in Simbad)meta.id;meta.mainintprimaryXpixX pixel coordinatepixpos.cartesian.xdoubleYpixY pixel coordinatepixpos.cartesian.ydouble2MASS2MASS name (HHMMSSss+DDMMSSs; J2000, Cat. II/246)meta.id.crosscharMmSimbad column added by the CDSmeta.ref.urlcharVmag[13.286/20.281] The V band magnitudemagphot.mag;em.opt.Vfloate_VmagThe 1{sigma} error in Vmagmagstat.error;phot.mag;em.opt.VfloatB-V[0.73/2.841] The (B-V) color indexmagphot.color;em.opt.B;em.opt.Vfloate_B-VThe 1{sigma} error in B-Vmagstat.error;phot.color;em.opt.BfloatU-B[0.258/2.784]? The (U-B) color indexmagphot.color;em.opt.U;em.opt.Bfloatnullablee_U-B? The 1{sigma} error in U-Bmagstat.error;phot.color;em.opt.UfloatnullableNm[1/4] Number of measurementsmeta.numberint_RAPositions computed from (Xpix,Ypix) by VizieR ({sigma}=0.16'') (right ascension part)degpos.eq.ra;meta.main_DEPositions computed from (Xpix,Ypix) by VizieR ({sigma}=0.16'') (declination part)degpos.eq.dec;meta.mainJ/AJ/143/46/table5Photometry and reddening for stars selected as likely members of Berkeley 55recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/237] Star number, <[NM2012] NNN> in Simbad (1)meta.id;meta.mainintE(B-V)[1.55/2.29] The E(B-V) excessmagphot.color.excessfloate_E(B-V)The 1{sigma} error in E(B-V)magstat.errorfloatV0mag[9.37/14.27] Intrinsic V band magnitudemagphot.mag.reddFree;em.opt.Vfloate_V0magThe 1{sigma} error in V0magmagstat.error;phot.mag;em.opt.VfloatSpTPhotometric spectral type (b3 to a0)src.spTypechar