J/other/AstBu/76ivo://CDS.VizieR/J/other/AstBu/76.39doi:10.26093/cds/vizier/dv/hgkdjCDSRomanyuk I.I.Semenko E.A.Moiseeva A.V.Yakunin I.A.Kudryavtsev D.O.2026-03-17T20:07:56Z2021-08-06T06:32:45ZCDS support team

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

cds-question@unistra.frmagnetic-fieldsspectroscopyap-starspeculiar-variable-starsstandard-starsThe paper presents magnetic field measurements for 15 chemically peculiar (CP) stars of subgroup 1b in the Orion OB1 association. We have found that the proportion of stars with strong magnetic fields among these 15 CP stars is almost twice as large as in subgroup 1a. Along with this, the age of subgroup 1b is estimated as 2Myr, and the age of subgroup 1a is in the order of 10Myr. The average root-mean-square magnetic field <Be> (all) for stars in subgroup 1b is 2.3 times higher than that for stars in subgroup 1a. The conclusions obtained fall within the concept of the fossil origin of large-scale magnetic fields in B and A stars, but the rate of field weakening with age appears anomalously high. We present our results as an important observational test for calibrating the theory of stellar magnetic field formation and evolution.2021AstBu..76...39Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/AstBu/76.39CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/other/AstBu/74.55 : Ori OB1 CP stars magnetic fields. III. (Romanyuk+, 2019)J/other/AstBu/76.163 : Ori OB1 CP stars magnetic fields. V. (Romanyuk+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/AstBu/76.39https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/AstBu/76.39http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/AstBu/76.39https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/AstBu/76.39https://vizier.iucaa.in/viz-bin/votable?-source=J/other/AstBu/76.39http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/AstBu/76.39GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/other/AstBu/76.39/stars (List of studied stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/AstBu/76.39/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/other/AstBu/76.39/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/AstBu/76.39/stars?GETtext/xml+votable180.050000true82.21875-0.6030560.0055555555555555565/5715 6/22851 22854 22859 22883-22884 22887https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/AstBu/76.39?format=asciidefaultJ/other/AstBu/76.39/starsList of studied starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameHD designationmeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainNobsNumber of observations in orib1b.dat filemeta.numberintSimbadSimbad column added by the CDSmeta.ref.urlcharJ/other/AstBu/76.39/orib1bMagnetic field measurements for 16 chemically peculiar starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameHD designationmeta.id;meta.maincharMJDMJD (Modified Heliocentric Julian Date)dtime.epochdoubleS/NSignal-to-noise ratiostat.snrintBe(z)? Longitudinal magnetic field, measured by the standard Babcock methodGphys.magField;src.redshiftintnullablee_Be(z)? rms uncertainty on Be(z)Gstat.errorintnullableBe(r)? Longitudinal magnetic field, measured by the regression methodGphys.magFieldintnullablee_Be(r)? rms uncertainty on Be(r)Gstat.errorintnullableBe(h)? Longitudinal magnetic field, measured by the core of the hydrogen H{beta} lineGphys.magFieldintnullable