J/A+A/669/A48ivo://CDS.VizieR/J/A+A/669/A48doi:10.26093/cds/vizier.36690048CDSBaran A.S.Van Grootel V.Ostensen R.H.Worters H.L.Sahoo S.K.,Sanjayan S.Charpinet S.Nemeth P.Telting J.H.Kilkenny D.2025-04-28T20:00:58Z2023-01-05T15:46:04ZCDS support team

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

cds-question@unistra.frasteroseismologyvariable-starsvisible-astronomyWe present results of a Transiting Exoplanet Survey Satellite (TESS) search for short-period pulsations in compact stellar objects observed in years 1 and 3 of the TESS mission, during which the southern ecliptic hemisphere was targeted. We describe the TESS data used and the details of the search method. For many of the targets, we use unpublished spectroscopic observations to classify the objects. From the TESS photometry, we clearly identify 43 short-period hot-subdwarf pulsators, including 32 sdB stars, eight sdOB stars, two sdO stars, and, significantly, one He-sdOB star, which is the first of this kind to show short-period pulsations. Eight stars show signals at both low and high frequencies, and are therefore "hybrid" pulsators.We report the list of prewhitened frequencies and we show the amplitude spectra calculated from the TESS data. We make an attempt to identify possible multiplets caused by stellar rotation, and we select four candidates with rotation periods between 1 and 12.9d. The most interesting targets discovered in this survey should be observed throughout the remainder of the TESS mission and from the ground. Asteroseismic investigations of these data sets will be invaluable in revealing the interior structure of these stars and will boost our understanding of their evolutionary history. We find three additional new variable stars but their spectral and variability types remain to be constrained.2023A&A...669A..48Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/669/A48CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/669/A48https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/669/A48http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/669/A48https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/669/A48https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/669/A48http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/669/A48GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/669/A48/sources (List of sources with frequencies in table 4)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/669/A48/sources?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/669/A48/sources?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/669/A48/sources?GETtext/xml+votable180.050000true200.315125-21.45488890.0055555555555555566/4271 4345 4653 4663 4782 16430 17636 20755 23157 23421 23510 24774 25108 25647 26112 26762 27045 33540 34414 35460 36587 38164 41656 42256 43297 44026 45949 46149 46907 47555 48344https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/669/A48?format=asciiOpticaldefaultJ/A+A/669/A48/sourcesList of sources with frequencies in table 4recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource name (TIC NNNNNNNN)meta.id;meta.maincharticDisplay the TIC-8 data (Stassun et al, 2019, Cat. IV/38meta.ref.urlchar_RAPositions from Simbad and TIC (right ascension part)degpos.eq.ra;meta.main_DEPositions from Simbad and TIC (declination part)degpos.eq.dec;meta.mainJ/A+A/669/A48/table4List of frequencies we detected in the targets observed in the ultra-short cadence (USC)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource name (TIC NNNNNNNN)meta.id;meta.maincharn_SourceNotemeta.notecharIDFrequency IDmeta.idcharFreqFrequencyuHzem.freqdoublee_Freq? Frequency erroruHzstat.errordoublenullablePerPeriodstime.perioddoublee_Per? Period errorsstat.errordoublenullableAmpAmplitude (in ppt)src.var.amplitudefloate_Amp? Amplitude error (in ppt)stat.errorfloatnullableS/NSignal-to-noise ratiostat.snrfloat