J/MNRAS/483/3127ivo://CDS.VizieR/J/MNRAS/483/3127doi:10.26093/cds/vizier.74833127CDSSikora J.Wade G.A.Power J.Neiner C.2024-08-19T20:15:53Z2022-08-11T10:14:21ZCDS support team

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

cds-question@unistra.frearly-type-starsmagnetic-fieldsVarious surveys focusing on the magnetic properties of intermediate-mass main-sequence (MS) stars have been previously carried out. One particularly puzzling outcome of these surveys is the identification of a dichotomy between the strong (>~100G), organized fields hosted by magnetic chemically peculiar (mCP) stars and the ultraweak (~<1G) fields associated with a small number of non-mCP MS stars. Despite attempts to detect intermediate strength fields (i.e. those with strengths >~10 and ~<100G), remarkably few examples have been found. Whether this so-called magnetic desert, separating the stars hosting ultraweak fields from the mCP stars truly exists has not been definitively answered. In 2007, a volume-limited spectropolarimetric survey of mCP stars using the MuSiCoS spectropolarimeter was initiated to test the existence of the magnetic desert by attempting to reduce the biases inherent in previous surveys. Since then, we have obtained a large number of ESPaDOnS and NARVAL Stokes V measurements allowing this survey to be completed. Here, we present the results of our homogeneous analysis of the rotational periods (inferred from photometric and magnetic variabilities) and magnetic properties (dipole field strengths and obliquity angles) of the 52 confirmed mCP stars located within a heliocentric distance of 100pc. No mCP stars exhibiting field strengths ~<300G are found within the sample, which is consistent with the notion that the magnetic desert is a real property and not the result of an observational bias. Additionally, we find evidence of magnetic field decay, which confirms the results of previous studies.2019MNRAS.483.3127Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/483/3127CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/483/3127https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/483/3127http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/483/3127https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/483/3127https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/483/3127http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/483/3127GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/483/3127/list (List of confirmed mCP stars with observations in table 1)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/483/3127/list?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/483/3127/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/483/3127/list?GETtext/xml+votable180.050000true37.266458367.40247220.005555555555555556Cone search capability for table J/MNRAS/483/3127/table2 (Spectropolarimetric observations of those stars for which no Zeeman signatures were detected)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/483/3127/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/483/3127/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/483/3127/table2?GETtext/xml+votable180.050000true2.096916129.09043110.005555555555555556Cone search capability for table J/MNRAS/483/3127/table3 (Parameters associated with the <Bz> curves)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/483/3127/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/483/3127/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/483/3127/table3?GETtext/xml+votable180.050000true10.4433219-56.50131610.0055555555555555566/351 666 962 3678 4072 7413 7705 7734 8462 8705 9048 10000 10142 10783 11057 11094 11202 11335 11339 11344 11573 11786 12396 14405 16104 16982 17888 18766 18797 20322 22020 22867 23546 24562 24621 26057 26381 26866 27678 28137 28142 28618 30083 31716 32019 32496 33935 34799 34875 36341 36563 38291 38441 39008 39162 39281 40486 40882 41516 41565 43004 44468 44711 44844 46436 46470 46768 46835 47539 48203https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/483/3127?format=asciidefaultJ/MNRAS/483/3127/listList of confirmed mCP stars with observations in table 1NameStar name (HD NNNNNN)meta.id;meta.maincharRAJ2000Simbad Right Ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Simbad Declination (J2000.0)pos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMcurveShow the magnetic field curvesmeta.ref.urlcharJ/MNRAS/483/3127/table1*Observations of confirmed mCP starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintInstInstrument used to obtain observation (G1)instr.setup;obscharHJDHeliocentric Julian Datedtime.epochdoublePhase? Rotational phasetime.phasefloatnullableBzDisc-averaged longitudinal magnetic fieldGphys.magFieldfloate_BzError on BzGstat.errorfloatNameStar name (HD NNNNNN)meta.id;meta.maincharJ/MNRAS/483/3127/table2Spectropolarimetric observations of those stars for which no Zeeman signatures were detectedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (HD NNNNNN)meta.id;meta.maincharInstInstrument used to obtain observation (G1)instr.setup;obscharHJDHeliocentric Julian Date; HJD-245000dtime.epochdoubletexpExposure timestime.duration;obs.exposureintNumberNumber of consecutive observationsmeta.numberintBzDisc-averaged longitudinal magnetic fieldGphys.magFieldfloate_BzError on BzGstat.errorfloat_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.mainSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/483/3127/table3Parameters associated with the <Bz> curvesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (HD NNNNNN)meta.id;meta.maincharProtAdopted or derived rotational perioddtime.perioddoubleq_Prot? Quality flag on Protmeta.code.qualintnullabler_ProtReference of Prot (1)meta.ref;pos.framecharHJD0Heliocentric Julian Date; HJD-240000dtime.epochdoubleB0Mean value associated with the first-order sinusoidal fits (2)Gphys.magFieldfloate_B0Error on B0Gstat.errorfloatB1Amplitude associated with the first-order sinusoidal fits (2)Gphys.magFieldfloate_B1Error on B1Gstat.errorfloatrRatio of the minimum to maximum effective fields (equation 2 of Preston 1967ApJ...150..547P)stat.fit.paramfloate_rError on rstat.errorfloatl_Chi2Upper limit on Chi2meta.code.errorcharChi2Reduced chi-squaredstat.fit.chi2float_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.mainSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/483/3127/table4Parameters associated with the magnetic field geometries and strengthsE_beta? Upper error on betadegstat.error;stat.maxfloatnullablee_beta? Lower error on betadegstat.errorfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (HD NNNNNN)meta.id;meta.mainchari? Inclination angledegsrc.orbital.inclination;pos.posAngintnullableE_i? Upper error on idegstat.error;stat.maxintnullablee_i? Lower error on idegstat.errorintnullablebeta? Obliquity angledeginstr.offsetfloatnullableBd? Dipole field strengthGphys.magFieldintnullableE_Bd? Upper error on BdGstat.error;stat.maxintnullablee_Bd? Lower error on BdGstat.errorintnullableBcCritical field strengthGphys.magFielddoubleE_BcUpper error on BcGstat.error;stat.maxfloate_BcLower error on BcGstat.errorfloatBd/Bc? Bd to Bc ratiostat.fit.paramfloatnullableE_Bd/Bc? Upper error on Bd/Bcstat.error;stat.maxfloatnullablee_Bd/Bc? Lower error on Bd/Bcstat.error;phys.abundfloatnullable