J/MNRAS/499/5379ivo://CDS.VizieR/J/MNRAS/499/5379doi:10.26093/cds/vizier.74995379CDSShultz M.E.Owocki S.Rivinius T.Wade G.A.Neiner C.Alecian E.,Kochukhov O.Bohlender D.Ud-doula A.Landstreet J.D.Sikora J.,David-uraz A.Petit V.Cerrahoglu P.Fine R.Henson G.,(the Mimes and Binamics Collaborations)2025-10-13T20:12:31Z2022-02-02T10:51:27ZCDS support team

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

cds-question@unistra.frearly-type-starsb-starsmagnetic-fieldsRapidly rotating early-type stars with strong magnetic fields frequently show H{alpha} emission originating in centrifugal magnetospheres (CMs), circumstellar structures in which centrifugal support due to magnetically enforced corotation of the magnetically confined plasma enables it to accumulate to high densities. It is not currently known whether the CM plasma escapes via centrifugal breakout (CB), or by an unidentified leakage mechanism. We have conducted the first comprehensive examination of the H{alpha} emission properties of all stars currently known to display CM-pattern emission. We find that the onset of emission is dependent primarily on the area of the CM, which can be predicted simply by the value B_K_ of the magnetic field at the Kepler corotation radius R_K_. Emission strength is strongly sensitive to both CM area and B_K_. Emission onset and strength are not dependent on effective temperature, luminosity, or mass-loss rate. These results all favour a CB scenario; however, the lack of intrinsic variability in any CM diagnostics indicates that CB must be an essentially continuous process, i.e. it effectively acts as a leakage mechanism. We also show that the emission profile shapes are approximately scale-invariant, i.e. they are broadly similar across a wide range of emission strengths and stellar parameters. While the radius of maximum emission correlates closely as expected to R_K_, it is always larger, contradicting models that predict that emission should peak at R_K_.2020MNRAS.499.5379Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/499/5379CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/499/5379https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/499/5379http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/499/5379https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/499/5379https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/499/5379http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/499/5379GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/499/5379/stars (List of stars with data in table A2)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/499/5379/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/499/5379/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/499/5379/stars?GETtext/xml+votable180.050000true48.05937527.25696390.0055555555555555566/842 22056 36298 44307 44354 44378https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/499/5379?format=asciidefaultJ/MNRAS/499/5379/starsList of stars with data in table A2recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarName of starmeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/499/5379/tablea2Longitudinal magnetic field measurements Bz of 6 stars obtained with the ESPaDonS and Narval spectropolarimeters using the least-squares deconvolution methodrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarName of starmeta.id;meta.maincharInst[E/N] Instrument (E=ESOaDOnS, N=Narval)meta.id;instrcharHJDHeliocentric Julian Datedtime.epochdoubleBzLongitudinal magnetic fieldGphys.magFieldfloate_BzLongitudinal magnetic field errorGstat.errorfloatNzNull fieldGphys.magFieldfloate_NzNull field errorGstat.errorfloat