J/MNRAS/461/4059ivo://CDS.VizieR/J/MNRAS/461/4059doi:10.26093/cds/vizier.74614059CDSBognar Zs.Paparo M.Molnar L.P. I. PapicsPlachy E.Verebelyi E.,Sodor A.2024-08-16T20:17:59Z2016-08-24T12:23:49ZCDS support team

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

cds-question@unistra.frvariable-starswhite-dwarf-starsccd-photometryG 207-9 and LP 133-144 are two rarely observed ZZ Ceti stars located in the middle and close to the blue edge of the ZZ Ceti instability domain, respectively. We aimed to observe them at least during one observing season at Konkoly Observatory with the purpose of extending the list of known pulsation modes for asteroseismic investigations and detect any significant changes in their pulsational behaviour. We determined five and three new normal modes of G 207-9 and LP 133-144, respectively. In LP 133-144, our frequency analysis also revealed that at least at three modes there are actually triplets with frequency separations of ~4Hz. The rotational period of LP 133-144 based on the triplets is ~=42h. The preliminary asteroseismic fits of G 207-9 predict Teff=12000 or 12400K and M=0.855--0.870M_{sun}_ values for the effective temperature and mass of the star, depending on the assumptions on the spherical degree (l) values of the modes. These results are in agreement with the spectroscopic determinations. In the case of LP 133-144, the best-fitting models prefer Teff=11800K in effective temperature and M*>=0.71M_{sun}_ stellar masses, which are more than 0.1M_{sun}_ larger than the spectroscopic value.2016MNRAS.461.4059Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/461/4059CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/631/1100 : Atmospheric parameters of DA white dwarfs (Gianninas+, 2005)J/A+A/528/A147 : CoRoT 101155310 light curve (Poretti+, 2011)J/A+A/570/A116 : Monitoring of the V777 Her star KUV 05134+2605 (Bognar+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/461/4059https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/461/4059http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/461/4059https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/461/4059https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/461/4059http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/461/4059GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/MNRAS/461/4059/g207CCD observations of G 207-9 at Konkoly observatoryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian dates in Barycentric Dynamical Time (BJD_TDB)dtime.epochdoubleDmagDifferential magnitudemagphot.mag;arith.diffdoubleJ/MNRAS/461/4059/lp133CCD observations of LP 133-144 at Konkoly observatoryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian dates in Barycentric Dynamical Time (BJD_TDB)dtime.epochdoubleDmagDifferential magnitudemagphot.mag;arith.diffdouble