J/A+A/477/917ivo://CDS.VizieR/J/A+A/477/917doi:10.26093/cds/vizier.34770917CDSPigulski A.Pojmanski G.2017-12-05T05:10:33Z2008-05-01T16:26:44ZCDS support team

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

cds-question@unistra.frWe analysed ASAS-3 photometry of bright early-type stars with the goal of finding new Beta Cephei stars. We were particularly interested in Beta Cephei stars that would be good for seismic analysis, i.e., stars that (i) have a large number of excited modes, (ii) show rotationally split modes, (iii) are components of eclipsing binary systems, (iv) have low-frequency modes, that is, are hybrid Beta Cephei/SPB stars. Our study was made with a homogeneous sample of over 4100 stars having MK spectral type B5 or earlier. For these stars, the ASAS-3 photometry was analysed by means of a Fourier periodogram. We have discovered 103 Beta Cephei stars, nearly doubling the number of previously known stars of this type. Among these stars, four are components of eclipsing binaries, seven have modes equidistant or nearly equidistant in frequency. In addition, we found five Beta Cephei stars that show low-frequency periodic variations, very likely due to pulsations. We therefore regard them as candidate hybrid Beta Cephei/SPB pulsators. All these stars are potentially very useful for seismic modeling. Moreover, we found Beta Cephei-type pulsations in three late O-type stars and fast period changes in one, HD 168050.2008A&A...477..917Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/477/917CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/264 : ASAS Variable Stars in Southern hemisphere (Pojmanski+ 2002-05)J/A+A/477/907 : Beta Cephei stars in the ASAS-3 data. I. (Pigulski+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/477/917https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/477/917http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/477/917https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/477/917https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/477/917http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/477/917GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/477/917/stars (Stars observed: names, and first mode parameters (table1 and excerpts from table2 of paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/477/917/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/477/917/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/477/917/stars?GETtext/xml+votable180.050000true98.8046625-25.84021390.005555555555555556Cone search capability for table J/A+A/477/917/table7 (The results of the verification of variability of 22 O and early B-type candidate short-period variables observed by Hipparcos and found by Koen (2001MNRAS.321...44K) and Koen & Eyer (2002, Cat. J/MNRAS/331/45))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/477/917/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/477/917/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/477/917/table7?GETtext/xml+votable180.050000true92.99469867.39131940.0055555555555555566/13000 13039 20769 21517 21538 22217 23648 23984 28700 28746 28759 28796 28888 29093 29105 29107 29164 29182 29453 29456 29463 29506 29739 30088 30222 30246 30268 37185 37192 37233 37244 37246 37327 37332 37334 37337 37356 37362 37865 37873 37895 37900 37904-37905 37909 37923-37926 37930-37931 38022-38023 38026 38066 38446 38597 38817 39193 39214 39238 39375 40451 40507 40987 41146 41165 41548 41635 41675 41679 41685 41697-41698 41700 41748 41776 41856 41858 42139 42162 42192 42195 42205 42263 42270 42287 42346 42368 42404 42416 42427 42477 42486 42564 42604 42795 43008 43018 43021 43024 43026-43027 43030 43033 43080 43130 43138 43392 43409 43758 44717 47335 47667 47987 480423.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/477/917?format=asciiOpticaldefaultJ/A+A/477/917/starsStars observed: names, and first mode parameters (table1 and excerpts from table2 of paper)NobsNmber of observationsmeta.noteintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHDHD number of the star (Cat. III/135)meta.id;meta.mainintprimaryDMBD/CPD star numbermeta.idcharASAS-3ASAS-3 number (Cat. II/264)meta.idcharModesNumber of variation modes foundmeta.numberintVmagJohnson V magnitudemagphot.mag;em.opt.VfloatB-V? Color index (B-V)magphot.color;em.opt.B;em.opt.VfloatnullableU-B? Color index (U-B)magphot.color;em.opt.U;em.opt.BfloatnullableSpTypeMK spectral typesrc.spTypecharr_SpType? Reference of spectral type (1)meta.ref;pos.frameintnullablef1Frequency of first moded**-1time.perioddoublee_f1? Mean error on f11e-06d**-1stat.errorintnullableA1? Amplitude of first modemagphot.magfloatnullablee_A1? Mean error on A1magstat.errorfloatnullableRemRemarksmeta.notecharLCplot the light curvemeta.ref.urlcharSimbadSimbad column added by the CDSmeta.refchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/A+A/477/917/table7The results of the verification of variability of 22 O and early B-type candidate short-period variables observed by Hipparcos and found by Koen (2001MNRAS.321...44K) and Koen & Eyer (2002, Cat. J/MNRAS/331/45)AA? ASAS amplitudemagsrc.var.amplitudefloatnullableS/N? Signal-to-noise ratiostat.snrfloatnullableDT? Detection thresholdmaginstr.sensitivityfloatnullableRemRemarksmeta.noteSimbadSimbad column added by the CDSmeta.refchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHIPHIP numbermeta.idintHD(E)HD(E) numbermeta.idintASAS-3ASAS-3 number (Cat. II/264)meta.idcharVmagV magnitudemagphot.mag;em.opt.VfloatfHHipparcos frequencyd**-1em.freqdoubleAHHipparcos amplitudemagsrc.var.amplitudefloatfA? ASAS frequencyd**-1em.freqdoublenullable