J/A+A/643/A110ivo://CDS.VizieR/J/A+A/643/A110doi:10.26093/cds/vizier.36430110CDSZwintz K.Neiner C.Kochukhov O.Ryabchikova T.Pigulski A.,Muellner M.Steindl T.Kuschnig R.Handler G.Moffat A.F.J.,Pablo H.Popowicz A.Wade G.A.2021-09-09T08:36:34Z2020-11-11T15:15:39ZCDS support team

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

cds-question@unistra.frccd-photometryspace-observatoriesobservational-astronomyf-starsvariable-starsF type stars are characterised by several physical processes such as different pulsation mechanisms, rotation, convection, diffusion, and magnetic fields. The rapidly rotating delta Scuti star beta Cas can be considered as a benchmark star to study the interaction of several of these effects. We investigate the pulsational and magnetic field properties of beta Cas. We also determine the star's apparent fundamental parameters and chemical abundances. Based on photometric time series obtained from three different space missions (BRITE-Constellation, SMEI, and TESS), we conduct a frequency analysis and investigate the stability of the pulsation amplitudes over four years of observations. We investigate the presence of a magnetic field and its properties using spectropolarimetric observations taken with the Narval instrument by applying the Least Square Deconvolution and Zeeman Doppler Imaging techniques. beta Cas shows only three independent p-mode frequencies down to the few ppm-level; its highest amplitude frequency is suggested to be a n=3, l=2, m=0 mode. Its magnetic field structure is quite complex and almost certainly of a dynamo origin. beta Cas' atmosphere is slightly deficient in iron peak elements and slightly overabundant in C, O, and heavier elements. Atypically for delta Scuti stars, we can only detect three pulsation modes down to exceptionally low noise levels for beta Cas.The star is also one of very few delta Scuti pulsators known to date to show a measurable magnetic field, and the first delta Scuti star with a dynamo magnetic field. These characteristics make beta Cas an interesting target for future studies of dynamo processes in the thin convective envelopes of F-type stars, of the transition region between fossil and dynamo fields, and the interaction between pulsations and magnetic field.2020A&A...643A.110Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/643/A110CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+AS/108/55 : beta Cas V-band light curve (Riboni+, 1994)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/643/A110https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/643/A110http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/643/A110https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/643/A110https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/643/A110http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/643/A110GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/643/A110/brite1beta Cas reduced light curves with BAb and BLb, 29/08/2015-26/10/2015recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeHeliocentric Julian date (HJD-2456000.0)dtime.epoch;pos.heliocentricdoublemagRelative reduced instrumental magnitudemmagphot.magfloatJ/A+A/643/A110/brite2beta Cas reduced light curves with BHr and BTr, 31/08/2015-20/01/2016recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeHeliocentric Julian date (HJD-2456000.0)dtime.epoch;pos.heliocentricdoublemagRelative reduced instrumental magnitudemmagphot.magfloatJ/A+A/643/A110/brite3beta Cas reduced light curves with BAb, 07/08/2016-30/12/2016recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeHeliocentric Julian date (HJD-2456000.0)dtime.epoch;pos.heliocentricdoublemagRelative reduced instrumental magnitudemmagphot.magfloatJ/A+A/643/A110/brite4beta Cas reduced light curves with UBr, 13/09/2016-01/02/2017recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeHeliocentric Julian date (HJD-2456000.0)dtime.epoch;pos.heliocentricdoublemagRelative reduced instrumental magnitudemmagphot.magfloatJ/A+A/643/A110/brite5beta Cas reduced light curves with BAb, 08/08/2017-03/02/2018recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeHeliocentric Julian date (HJD-2456000.0)dtime.epoch;pos.heliocentricdoublemagRelative reduced instrumental magnitudemmagphot.magfloatJ/A+A/643/A110/brite6beta Cas reduced light curves with BAb, 08/08/2018-04/11/2018recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeHeliocentric Julian date (HJD-2456000.0)dtime.epoch;pos.heliocentricdoublemagRelative reduced instrumental magnitudemmagphot.magfloatJ/A+A/643/A110/brite7beta Cas reduced light curves with BTr, 14/09/2018-21/01/2019recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeHeliocentric Julian date (HJD-2456000.0)dtime.epoch;pos.heliocentricdoublemagRelative reduced instrumental magnitudemmagphot.magfloatJ/A+A/643/A110/smeibeta Cas reduced light curves with SMEI, 06/02/2003-30/12/2010recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeHeliocentric Julian date (HJD-2450000.0)dtime.epoch;pos.heliocentricdoublemagRelative reduced instrumental magnitudemagphot.magdoublee_magError of relative reduced instrumental magnitudemagstat.error;phot.magdouble