J/AJ/146/102ivo://CDS.VizieR/J/AJ/146/102doi:10.26093/cds/vizier.51460102CDSSaesen S.Briquet M.Aerts C.Miglio A.Carrier F.2026-01-13T18:55:34Z2014-07-16T13:14:10ZCDS support team

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

cds-question@unistra.fropen-star-clustersb-starsRecent progress in the seismic interpretation of field {beta} Cep stars has resulted in improvements of the physical description in the stellar structure and evolution model computations of massive stars. Further asteroseismic constraints can be obtained from studying ensembles of stars in a young open cluster, which all have similar age, distance, and chemical composition. We present an observational asteroseismology study based on the discovery of numerous multi-periodic and mono-periodic B stars in the open cluster NGC 884. We describe a thorough investigation of the pulsational properties of all B-type stars in the cluster. Overall, our detailed frequency analysis resulted in 115 detected frequencies in 65 stars. We found 36 mono-periodic, 16 bi-periodic, 10 tri-periodic, and 2 quadru-periodic stars and one star with nine independent frequencies. We also derived the amplitudes and phases of all detected frequencies in the U, B, V, and I filter, if available. We achieved unambiguous identifications of the mode degree for 12 of the detected frequencies in nine of the pulsators. Imposing the identified degrees and measured frequencies of the radial, dipole, and quadrupole modes of five pulsators led to a seismic cluster age estimate of log(age/yr)=7.12-7.28 from a comparison with stellar models. Our study is a proof-of-concept for and illustrates the current status of ensemble asteroseismology of a young open cluster.2013AJ....146..102Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/146/102CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/144/158 : Properties of B and Be stars in h and X Persei (Marsh+, 2012)J/A+A/515/A16 : UBVI light curves of NGC 884 variables (Saesen+, 2010)J/PASP/114/233 : h and {chi} Per memberships (Uribe+, 2002)J/ApJ/576/880 : CCD UBV photometry of h and {chi} Per (Slesnick+, 2002)J/A+A/325/987 : UBV magnitude of NGC 884 B-type pulsators (Krzesinski+ 1997)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/146/102https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/146/102http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/146/102https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/146/102https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/146/102http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/146/102GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/146/102/table4 (Results of the multi-frequency fit to the U, B, V, and I light curves of all B stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/146/102/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/146/102/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/146/102/table4?GETtext/xml+votable180.050000true35.356.99166670.0055555555555555566/3256-3257https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/146/102?format=asciidefaultJ/AJ/146/102/table4Results of the multi-frequency fit to the U, B, V, and I light curves of all B starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintOo[1898/2753] Star Oosterhoff number, <NGC 884 NNNN> in Simbadmeta.id;meta.mainintNfNumber of frequencies for this starmeta.numberintnullablei[1/9]? Frequency identifier (1)meta.idintnullablef(i)? Frequency f_i_ of the observed mode (1)d**-1em.freq;src.vardoublenullablee_f(i)? Uncertainty in f(i)Md**-1stat.errorintnullablef_f(i)[abc] Combined frequency (2)meta.codecharUamp? U band amplitudemmagsrc.var.amplitudefloatnullablee_Uamp? Uncertainty in Uampmmagstat.errorfloatnullableUphi[0/1]? U band phase (1)time.phasefloatnullablee_Uphi? Uncertainty in Uphitime.phaseintnullableS/NU? U band signal-to-noise (3)stat.snrfloatnullableBamp? B band amplitudemmagsrc.var.amplitudefloatnullablee_Bamp? Uncertainty in B-Ammagstat.errorfloatnullableBphi[0/1]? B band phase (1)time.phasefloatnullablee_Bphi? Uncertainty in B-phitime.phaseintnullableS/NB? B band signal-to-noise (3)stat.snrfloatnullableVamp? V band amplitudemmagsrc.var.amplitudefloatnullablee_Vamp? Uncertainty in V-Ammagstat.errorfloatnullableVphi[0/1]? V band phase (1)time.phasefloatnullablee_Vphi? Uncertainty in V-phitime.phaseintnullableS/NV? V band signal-to-noise (3)stat.snrfloatnullableIamp? I band amplitudemmagsrc.var.amplitudefloatnullablee_Iamp? Uncertainty in I-Ammagstat.errorfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlcharIphi[0/1]? I band phase (1)time.phasefloatnullablee_Iphi? Uncertainty in I-phitime.phaseintnullableS/NI? I band signal-to-noise (3)stat.snrfloatnullablelMode identification of the degree {ell} (4)stat.fit.paramchar_RAPositions from SIMBAD database (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD database (declination part)degpos.eq.dec;meta.main