J/A+A/638/A108ivo://CDS.VizieR/J/A+A/638/A108doi:10.26093/cds/vizier.36380108CDSMackebrandt F.Schuh S.Silvotti R.Kim S.-L.Kilkenny D.Green E.M.,Lutz R.Nagel T.Provencal J.L.Otani T.Oswalt T.D.Benatti S.,Lanteri L.Bonanno A.Frasca A.Janulis R.Paparo M.Molnar L.,Claudi R.Ostensen R.H.2020-10-05T08:22:59Z2020-06-23T07:33:38ZCDS support team

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

cds-question@unistra.frsubdwarf-starsb-starsasteroseismologyWe investigate variations in the arrival time of coherent stellar pulsations due to the light travel time effect to test for the presence of sub-stellar companions. Those companions are the key to one possible formation scenario of apparently single subdwarf B stars. We make use of an extensive set of ground-based observations of the four large amplitude p-mode pulsators DW Lyn, V1636 Ori, QQ Vir and V541 Hya. Observations of the TESS space telescope are available on two of the targets. The timing method compares the phase of sinusoidal fits to the full multi-epoch ligh curves with phases from the fit of a number of subsets of the original time series. TESS observations do not sample the pulsations well enough to be useful due to the (currently) fixed 2 minute cadence. From the ground- based observations, we infer evolutionary parameters from the arrival times. The residual signals show many statistically significant periodic signals, but no clear evidence for changes in arrival time induced by sub-stellar companions. The signals can be explained partly by mode beating effects. We derive upper limits on companion masses set by the observational campaign.2020A&A...638A.108Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/638/A108CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/638/A108https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/638/A108http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/638/A108https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/638/A108https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/638/A108http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/638/A108GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/638/A108/listlcList of light curve filesNameStar namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLCShow the light curvesmeta.ref.urlcharFileNameName of the file with ligth curve in subdirectory lcmeta.id;meta.filecharObs.dateObservation datetime.epoch;obsnullablen_Obs.dateAdditional information on Obs.datemeta.notecharInstInstrumentmeta.id;instrcharJ/A+A/638/A108/dwla1Amplitude measurement for f1 of DW LynrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleAmpAmplitude0.01%src.var.amplitude;arith.ratiodoublee_AmpAmplitude error0.01%stat.errordoubleJ/A+A/638/A108/dwlor1O-C measurement for f1 of DW Lyn after subtracting quadratic trendrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleO-CO-C of arrival timesstat.fit.residualdoublee_O-CO-C of arrival time errorsstat.error;stat.fit.omcdoubleJ/A+A/638/A108/dwlor2O-C measurement for f2 of DW Lyn after subtracting quadratic trendrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleO-CO-C of arrival timesstat.fit.residualdoublee_O-CO-C of arrival time errorsstat.error;stat.fit.omcdoubleJ/A+A/638/A108/qqvo1O-C measurement for f1 of QQ VirrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleO-CO-C of arrival timesstat.fit.residualdoublee_O-CO-C of arrival time errorsstat.error;stat.fit.omcdoubleJ/A+A/638/A108/qqvo2O-C measurement for f2 of QQ VirrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleO-CO-C of arrival timesstat.fit.residualdoublee_O-CO-C of arrival time errorsstat.error;stat.fit.omcdoubleJ/A+A/638/A108/qqvor1O-C measurement for f1 of QQ Vi after subtracting quadratic trendrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleO-CO-C of arrival timesstat.fit.residualdoublee_O-CO-C of arrival time errorsstat.error;stat.fit.omcdoubleJ/A+A/638/A108/qqvor2O-C measurement for f2 of QQ Vir after subtracting quadratic trendO-CO-C of arrival timesstat.fit.residualdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoublee_O-CO-C of arrival time errorsstat.error;stat.fit.omcdoubleJ/A+A/638/A108/qqvor3O-C measurement for f3 of QQ Vir after subtracting quadratic trendO-CO-C of arrival timesstat.fit.residualdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoublee_O-CO-C of arrival time errorsstat.error;stat.fit.omcdoubleJ/A+A/638/A108/v16o1O-C measurement for f1 of V1636 OrirecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleO-CO-C of arrival timesstat.fit.residualdoublee_O-CO-C of arrival time errorsstat.error;stat.fit.omcdoubleJ/A+A/638/A108/v54o1O-C measurement for f1 of V541 HyarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleO-CO-C of arrival timesstat.fit.residualdoublee_O-CO-C of arrival time errorsstat.error;stat.fit.omcdoubleJ/A+A/638/A108/v54o2O-C measurement for f2 of V541 HyarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleO-CO-C of arrival timesstat.fit.residualdoublee_O-CO-C of arrival time errorsstat.error;stat.fit.omcdoubleJ/A+A/638/A108/v54or1O-C measurement for f1 of V541 Hya after subtracting quadratic trendrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleO-CO-C of arrival timesstat.fit.residualdoublee_O-CO-C of arrival time errorsstat.error;stat.fit.omcdoubleJ/A+A/638/A108/v54or2O-C measurement for f2 of V541 Hya after subtracting quadratic trendrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleO-CO-C of arrival timesstat.fit.residualdoublee_O-CO-C of arrival time errorsstat.error;stat.fit.omcdoubleJ/A+A/638/A108/dwlepochDW Lyn epochsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEpoch1Star timestime.epochnullableEpoch2End timestime.epochnullableJ/A+A/638/A108/qqvepochQQ Vir epochsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEpoch1Star timestime.epochnullableEpoch2End timestime.epochnullableJ/A+A/638/A108/v16epochV1636 Ori epochsEpoch1Star timestime.epochnullableEpoch2End timestime.epochnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ/A+A/638/A108/v54epochV541 Hya epochsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEpoch1Star timestime.epochnullableEpoch2End timestime.epochnullableJ/A+A/638/A108/dwlobsObserving times of DW LynNoteNotemeta.notecharEpochEpoch numbermeta.id;meta.mainintObsObservatorymeta.id;instr.obstycharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObs.dateObservation datetime.epoch;obsnullableStartUTC starttime.epochnullableEndUTC endtime.epochnullableObs.time? Time of observation, in decimal hourshtime.epochfloatnullableJ/A+A/638/A108/qqvobsObserving times of QQ VirNoteNotemeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEpochEpoch numbermeta.id;meta.mainintObsObservatorymeta.id;instr.obstycharObs.dateObservation datetime.epoch;obsnullableStartUTC starttime.epochnullableEndUTC endtime.epochnullableObs.time? Time of observation, in decimal hourshtime.epochfloatnullableJ/A+A/638/A108/v16obsObserving times of V1636 OrirecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEpochEpoch numbermeta.id;meta.mainintObsObservatorymeta.id;instr.obstycharObs.dateObservation datetime.epoch;obsnullableStartUTC starttime.epochnullableEndUTC endtime.epochnullableObs.time? Time of observation, in decimal hourshtime.epochfloatnullableNoteNotemeta.notecharJ/A+A/638/A108/v54obsObserving times of V541 HyarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEpochEpoch numbermeta.id;meta.mainintObsObservatorymeta.id;instr.obstycharObs.dateObservation datetime.epoch;obsnullableStartUTC starttime.epochnullableEndUTC endtime.epochnullableObs.time? Time of observation, in decimal hourshtime.epochfloatnullableNoteNotemeta.notecharJ/A+A/638/A108/dwlpwAmplitude spectrum of DW LynrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFreqFrequencyd**-1em.freqdoubleAmpAmplitude0.01%src.var.amplitude;arith.ratiodoubleJ/A+A/638/A108/dwlpwrAmplitude spectrum of DW LynrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFreqFrequencyd**-1em.freqdoubleAmpAmplitude0.01%src.var.amplitude;arith.ratiodoubleJ/A+A/638/A108/qqvpwAmplitude spectrum of QQ VirrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFreqFrequencyd**-1em.freqdoubleAmpAmplitude0.01%src.var.amplitude;arith.ratiodoubleJ/A+A/638/A108/qqvpwrAmplitude spectrum of QQ VirrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFreqFrequencyd**-1em.freqdoubleAmpAmplitude0.01%src.var.amplitude;arith.ratiodoubleJ/A+A/638/A108/v16pwAmplitude spectrum of V1636 OrirecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFreqFrequencyd**-1em.freqdoubleAmpAmplitude0.01%src.var.amplitude;arith.ratiodoubleJ/A+A/638/A108/v16pwrAmplitude spectrum of V1636 OrirecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFreqFrequencyd**-1em.freqdoubleAmpAmplitude0.01%src.var.amplitude;arith.ratiodoubleJ/A+A/638/A108/v54pwAmplitude spectrum of V541 HyarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFreqFrequencyd**-1em.freqdoubleAmpAmplitude0.01%src.var.amplitude;arith.ratiodoubleJ/A+A/638/A108/v54pwrAmplitude spectrum of V541 HyarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFreqFrequencyd**-1em.freqdoubleAmpAmplitude0.01%src.var.amplitude;arith.ratiodoubleJ/A+A/638/A108/dwla2Amplitude measurement for f2 of DW LynrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleAmpAmplitude0.01%src.var.amplitude;arith.ratiodoublee_AmpAmplitude error0.01%stat.errordoubleJ/A+A/638/A108/qqva1Amplitude measurement for f1 of QQ VirrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleAmpAmplitude0.01%src.var.amplitude;arith.ratiodoublee_AmpAmplitude error0.01%stat.errordoubleJ/A+A/638/A108/qqva2Amplitude measurement for f2 of QQ VirrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleAmpAmplitude0.01%src.var.amplitude;arith.ratiodoublee_AmpAmplitude error0.01%stat.errordoubleJ/A+A/638/A108/qqva3Amplitude measurement for f3 of QQ VirrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleAmpAmplitude0.01%src.var.amplitude;arith.ratiodoublee_AmpAmplitude error0.01%stat.errordoubleJ/A+A/638/A108/v16a1Amplitude measurement for f1 of V1636 OrirecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleAmpAmplitude0.01%src.var.amplitude;arith.ratiodoublee_AmpAmplitude error0.01%stat.errordoubleJ/A+A/638/A108/v16a2Amplitude measurement for f2 of V1636 OrirecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleAmpAmplitude0.01%src.var.amplitude;arith.ratiodoublee_AmpAmplitude error0.01%stat.errordoubleJ/A+A/638/A108/v54a1Amplitude measurement for f1 of V541 HyarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleAmpAmplitude0.01%src.var.amplitude;arith.ratiodoublee_AmpAmplitude error0.01%stat.errordoubleJ/A+A/638/A108/v54a2Amplitude measurement for f2 of V541 HyarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleAmpAmplitude0.01%src.var.amplitude;arith.ratiodoublee_AmpAmplitude error0.01%stat.errordoubleJ/A+A/638/A108/dwlo1O-C measurement for f1 of DW LynrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleO-CO-C of arrival timesstat.fit.residualdoublee_O-CO-C of arrival time errorsstat.error;stat.fit.omcdoubleJ/A+A/638/A108/dwlo2O-C measurement for f2 of DW LynrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleO-CO-C of arrival timesstat.fit.residualdoublee_O-CO-C of arrival time errorsstat.error;stat.fit.omcdoubleJ/A+A/638/A108/qqvo3O-C measurement for f3 of QQ VirrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleO-CO-C of arrival timesstat.fit.residualdoublee_O-CO-C of arrival time errorsstat.error;stat.fit.omcdoubleJ/A+A/638/A108/v16o2O-C measurement for f2 of V1636 OrirecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleO-CO-C of arrival timesstat.fit.residualdoublee_O-CO-C of arrival time errorsstat.error;stat.fit.omcdoubleJ/A+A/638/A108/v16or1O-C measurement for f1 of V1636 Ori after subtracting quadratic trendrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleO-CO-C of arrival timesstat.fit.residualdoublee_O-CO-C of arrival time errorsstat.error;stat.fit.omcdoubleJ/A+A/638/A108/v16or2O-C measurement for f2 of V1636 Ori after subtracting quadratic trendrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDTime (mid time of the epoch)dtime.epochdoubleO-CO-C of arrival timesstat.fit.residualdoublee_O-CO-C of arrival time errorsstat.error;stat.fit.omcdouble