J/other/AstBu/76ivo://CDS.VizieR/J/other/AstBu/76.163doi:10.26093/cds/vizier/dv/hgkbgdCDSRomanyuk I.I.Semenko E.A.Moiseeva A.V.Yakunin I.A.Kudryavtsev D.O.2026-03-17T20:07:55Z2021-08-06T06:34:40ZCDS 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 the results of magnetic field measurements of 27 chemically peculiar stars in subgroups (c) and (d) of the Orion OB1 association. In total, more than 140 circularly polarized spectra were obtained and measured in the period from 2013 to 2020. An analysis of the results showed that 13 out of 24 CP stars in subgroup (c) have a magnetic field. At the same time, no field of a significant strength was found in any of the three CP stars in subgroup (d). We found that the occurrence of magnetic stars in subgroup (c), whose average age is approximately 5Myr, lies in the middle between the occurrence of magnetic stars in subgroups (a) with an age of 10 Myr and (b), whose age is about 2Myr. Our results indicate a sharp decrease in the occurrence of magnetic CP stars and a simultaneous decrease in their magnetic field with age. The data obtained with the example of the Orion OB1 association generally support the theory of the fossil origin of the magnetic field of chemically peculiar stars; however, the process of the field formation itself can have a number of features manifesting observationally.2021AstBu..76..163Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/AstBu/76.163CatalogResearchIsServedByTAP 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/76.163https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/AstBu/76.163http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/AstBu/76.163https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/AstBu/76.163https://vizier.iucaa.in/viz-bin/votable?-source=J/other/AstBu/76.163http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/AstBu/76.163GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/other/AstBu/76.163/stars (List of studied stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/AstBu/76.163/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/other/AstBu/76.163/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/AstBu/76.163/stars?GETtext/xml+votable180.050000true80.136667-5.2880560.0055555555555555565/5359 6/21389 21432-21433 21488 21490 22800 22805 22807-22808 22848-22850 22857https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/AstBu/76.163?format=asciidefaultJ/other/AstBu/76.163/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 orib1c.dat filemeta.numberintSimbadSimbad column added by the CDSmeta.ref.urlcharJ/other/AstBu/76.163/orib1cMagnetic field measurements for 27 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)time.epochdoubleS/N? Signal-to-noise ratiostat.snrintnullableBe(z)Longitudinal magnetic field, measured by the standard Babcock methodGphys.magField;src.redshiftinte_Be(z)rms uncertainty on Be(z)Gstat.errorintBe(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