J/MNRAS/475/5144ivo://CDS.VizieR/J/MNRAS/475/5144doi:10.26093/cds/vizier.74755144CDSShultz M.Wade G.A.Rivinius Th.Neiner C.Alecian E.Bohlender D.,Monin D.Sikora J.MiMeS collaborationBinaMIcS collaboration2024-08-18T20:18:12Z2018-03-15T08:00:49ZCDS support team

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

cds-question@unistra.frmagnetic-fieldsearly-type-starsbp-starsThe rotational and magnetic properties of many magnetic hot stars are poorly characterized, therefore the MiMeS and BinaMIcS collaborations have collected extensive high-dispersion spectropolarimetric datasets of these targets. We present longitudinal magnetic field measurements <B_Z_> for 52 early B-type stars (B5 to B0), with which we attempt to determine their rotational periods Prot. Supplemented with high-resolution spectroscopy, low-resolution DAO circular spectropolarimetry, and archival Hipparcos photometry, we determined Prot for 10 stars, leaving only 5 stars for which Prot could not be determined. Rotational ephemerides for 14 stars were refined via comparison of new to historical magnetic measurements. The distribution of Prot is very similar to that observed for the cooler Ap/Bp stars. We also measured vsini and v_mac_ for all stars. Comparison to non-magnetic stars shows that vsini is much lower for magnetic stars, an expected consequence of magnetic braking. We also find evidence that v_mac_ is lower for magnetic stars. LSD profiles extracted using single-element masks revealed widespread, systematic discrepancies in <B_Z_> between different elements: this effect is apparent only for chemically peculiar stars, suggesting it is a consequence of chemical spots. Sinusoidal fits to H line <B_Z_> measurements (which should be minimally affected by chemical spots), yielded evidence of surface magnetic fields more complex than simple dipoles in 6 stars for which this has not previously been reported; however, in all 6 cases the second- and third-order amplitudes are small relative to the first-order (dipolar) amplitudes.2018MNRAS.475.5144Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/475/5144CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/475/5144https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/475/5144http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/475/5144https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/475/5144https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/475/5144http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/475/5144GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/MNRAS/475/5144/table1Summary of the stars and available spectropolarimetric, spectroscopic, and photometric observationsSimbadNameSimbad column added by the CDSmeta.idcharONameOther namemeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBZ[BZ ] Indicates stars with data in bz_hr.dat filemeta.notecharDAO[DAO ] Indicates stars with data in dao_bz.dat filemeta.notecharStarHD name (HDNNNNNNA) or ALS3694meta.id;meta.maincharSpTypeSpectral typesrc.spTypecharRemRemarks (1)meta.notecharE? Number of high-dispersion spectropolarimetric observations obtained with ESPaDOnSmeta.numberintnullableN? Number of high-dispersion spectropolarimetric observations obtained with Narvalmeta.numberintnullableH? Number of high-dispersion spectropolarimetric observations obtained with HARPSpolmeta.numberintnullableT? Total number of magnetic measurementsmeta.numberintnullable<S/N>? Mean signal-to-noise ratio (2)stat.snr;stat.meanintnullableD? Number of DAO observations obtained with the low-dispersion dimaPol spectropolarimetermeta.numberintnullableF? Nnumber of spectroscopic observations obtained with FEROSmeta.numberintnullableHip? Number of archival Hipparcos photometric measurementsmeta.numberintnullableJ/MNRAS/475/5144/bz_hrHigh-resolution longitudinal magnetic field measurements from ESPaDOnS, Narval, and HARPSpol for 49 starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarHD name (HDNNNNNNA), except for ALS3694meta.id;meta.maincharInstInstrumentmeta.id;instrcharMaskLine maskmeta.notecharHJDHeliocentric Julian Datedtime.epochdoubleBzLongitudinal magnetic fieldGphys.magFieldinte_BzLongitudinal magnetic field uncertaintyGstat.errorintNzNull magnetic fieldGphys.magFieldinte_NzNull magnetic field uncertaintyGstat.errorintJ/MNRAS/475/5144/dao_bzLow-resolution longitudinal magnetic field measurements from dimaPol for 10 starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarHD name (HDNNNNNN)meta.id;meta.maincharLineLine from which the instrument was derivedmeta.id;spect.linecharHJDHeliocentric Julian Date (HJD-2400000)dtime.epochdoubleBzLongitudinal magnetic fieldGphys.magFieldinte_BzLongitudinal magnetic field uncertaintyGstat.errorint