J/AJ/122/248ivo://CDS.VizieR/J/AJ/122/248doi:10.26093/cds/vizier.51220248CDSKeller S.C.Grebel E.K.Miller G.J.Yoss K.M.2023-04-06T16:50:45Z2002-03-01T15:02:08ZCDS support team

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

cds-question@unistra.fropen-star-clustersinfrared-photometryvisible-astronomybroad-band-photometryh-alpha-photometrybe-starsUBVI and H{alpha} photometry is presented for 17319 stars in vicinity of the young double cluster h and {chi} Persei. Our photometry extends over a 37'x1{deg} field centered on the association. We construct reddening contours within the imaged field. We find that the two clusters share a common distance modulus of 11.75+/-0.05 and ages of log[age(yr)]=7.1+/-0.1. From the V-H{alpha} color, a measure of the H{alpha} emission strength, we conduct a survey for emission line objects within the association. We detect a sample of 33 Be stars, eight of which are new detections. We present a scenario of evolutionary enhancement of the Be phenomenon to account for the peak in Be fraction toward the top of the main sequence in the population of h and {chi} Persei and similar young clusters. UBVI and H{alpha} photometry was performed on five nights between 1999 August 17 and 25 at the San Diego State University Mount Laguna Observatory with the 1m telescope and a Loral 2048x2048 CCD.2001AJ....122..248Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/122/248CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/372/477 : ubvy{beta} photometry of h + chi Persei (Marco+, 2001)J/A+AS/119/271 : Be stars uvby{beta} photometry (Fabregat+, 1996)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/122/248https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/122/248http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/122/248https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/122/248https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/122/248http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/122/248GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/122/248/table2 (Photometric data)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/122/248/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/122/248/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/122/248/table2?GETtext/xml+votable180.050000true35.480723957.24329220.0055555555555555565/814 6/https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/122/248?format=asciiOpticalInfrareddefaultJ/AJ/122/248/table1Atmospheric extinction coefficients and photometric zero points from the present studyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateObservation datetime.epochnullablek1,VAtmospheric extinction coefficient in V bandmagobs.atmos.extinctionfloate_k1,Vrms uncertainty on k1,Vmagstat.errorfloatk1,BAtmospheric extinction coefficient in B bandmagobs.atmos.extinctionfloate_k1,Brms uncertainty on k1,Bmagstat.errorfloatk1,UAtmospheric extinction coefficient in U bandmagobs.atmos.extinctionfloate_k1,Urms uncertainty on k1,Umagstat.errorfloatK1,IAtmospheric extinction coefficient in I bandmagobs.atmos.extinctionfloate_K1,Irms uncertainty on k1,Imagstat.errorfloatksiVPhotometric zero point in V bandmagphot.mag;arith.zpfloate_ksiVrms uncertainty on ksiVmagstat.errorfloatksiBPhotometric zero point in B bandmagphot.mag;arith.zpfloate_ksiBrms uncertainty on ksiBmagstat.errorfloatksiUPhotometric zero point in U bandmagphot.mag;arith.zpfloate_ksiUrms uncertainty on ksiUmagstat.errorfloatksiIPhotometric zero point in I bandmagphot.mag;arith.zpfloate_ksiIrms uncertainty on ksiImagstat.errorfloatJ/AJ/122/248/table2Photometric dataU-BThe U-B colormagphot.color;em.opt.U;em.opt.BfloatB-VThe B-V colormagphot.color;em.opt.B;em.opt.VfloatV-IThe V-I colormagphot.color;em.opt.V;em.opt.IfloatV-HaThe V-H{alpha} colormagphot.color;em.line.HalphafloatBe[Be] Be: Be starmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[KGM2001]Identification numbermeta.id;meta.mainintprimaryXpixX pixel position (1)pixpos.cartesian.x;instr.detdoubleYpixY pixel position (1)pixpos.cartesian.y;instr.detdoubleVmagThe V-band magnitudemagphot.mag;em.opt.VfloatOos? The Oosterhoff (1937AnLei..17a...1O) identification number (2)meta.idintnullable_RAPositions computed from (Xpix,Ypix) by VizieR (right ascension part)degpos.eq.ra;meta.main_DEPositions computed from (Xpix,Ypix) by VizieR (declination part)degpos.eq.dec;meta.main