J/MNRAS/429/119ivo://CDS.VizieR/J/MNRAS/429/119doi:10.26093/cds/vizier.74290119CDSPaunzen E.Wraight K.T.Fossati L.Netopil M.White G.J.Bewsher D.2026-01-20T12:13:43Z2014-04-14T10:04:34ZCDS support team

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

cds-question@unistra.frpeculiar-variable-starsWe have analysed the photometric data obtained with the STEREO spacecraft for 558 non-magnetic chemically peculiar (CP) stars to search for rotational and pulsational variability. Applying the Lomb-Scargle and the phase dispersion minimization methods, we have detected photometric variability for 44 objects from which 35 were previously unknown. The new objects are all bright stars on the ecliptic plane (magnitude range 4.7<V<11.7) and will therefore be of great interest to studies of stellar structure and evolution. In particular, several show multiple signals consistent with hybrid {delta} Scuti and {gamma} Doradus pulsation, with different periodicities allowing very different regions of the stellar interior to be studied. There are two subgroups of stars in our sample: the cool metallic line Am (CP1) and the hot HgMn (CP3) stars. These objects fall well inside the classical instability strip where {delta} Scuti, {gamma} Doradus and slowly pulsating B-type stars are located. We also expect to find periods correlated to the orbital period for CP1 objects as they are mostly members of binary systems. For CP3 stars, rotationally induced variability is still a matter of debate. Although surface spots were detected, they are believed to produce only marginal photometric amplitudes. So, periods from several hours to a few days were expected for these two star groups. The STEREO/HI-1 data are well matched to studies of this frequency domain, owing to the cadence of approximately 40-min and multiple epochs over four and a half years. The remaining 514 stars are likely to be constant in the investigated range from 0.1 to 10d. In some cases, the presence of blending or systematic effects prevented us from detecting any reliable variability and in those cases we classified the star as constant. We discuss our results in comparison to already published ones and find a very good agreement. Finally, we have calibrated the variable stars in terms of the effective temperature and luminosity in order to estimate masses and ages. For this purpose, we used specifically developed calibrations for CP stars and, when available, Hipparcos parallaxes. All but two objects cover the stellar mass range from 1.5 to 5M_{sun}_ and are located between the zero- and terminal-age main sequence.2013MNRAS.429..119Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/429/119CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/260 : General Catalogue of Ap and Am stars (Renson+ 2009)J/MNRAS/420/757 : STEREO magnetic chemically peculiar stars (Wraight+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/429/119https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/429/119http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/429/119https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/429/119https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/429/119http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/429/119GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/429/119/table1 (Basic properties of the CP1 and CP3 stars identified as constant or for which the quality of the data prevented the detection of any variability)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/429/119/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/429/119/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/429/119/table1?GETtext/xml+votable180.050000true1.916661.094210.005555555555555556Cone search capability for table J/MNRAS/429/119/table2 (Basic properties of the CP1 and CP3 stars identified as constant or probably constant after the individualized analysis)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/429/119/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/429/119/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/429/119/table2?GETtext/xml+votable180.050000true5.20745-0.871090.005555555555555556Cone search capability for table J/MNRAS/429/119/table3 (Properties of the CP1 and CP3 stars identified as photometrically variable)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/429/119/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/429/119/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/429/119/table3?GETtext/xml+votable180.050000true7.2858611.32020.0055555555555555565/6069 6083 6086 6090-6091 6094-6095 6106 6113-6114 6116-6117 6119-6121 6123 6125 6128-6129 6/89 109 155 339 350 368 406 411 455-456 461 463 474 485 526 565 607 628 689 714 721 819 1033 1119 1128 1145 1283-1286 1296 4124 4181 4206 4297-4298 4338 4394 4418 4456 4463 4465 4472 4548 4661 4663 4687 4697-4698 4716 4720 4729 4802 4873 4915 6155 6185 6340 17081 17946 17959 18062 18094 18200 18290 18447 18454 18467 18493 18508 18591 18739 18766 18820 18854 18988 19028 19045 19073 19525 19531 19572 19610 19780 22357 23493 23502 23518 23526 23537 23539 23546-23547 23769 23772-23773 23790 23826 23841 23850 23860 23897 23909 23938 23958 23969 23975 23986 24027 24029 24107-24108 24158 24178 24187 24189-24191 24214 24235 24272-24273 24280 24285 24287 24299 24317 24338-24339 24348 24353 24355-24356 24358-24359 24369-24372 24374-24375 24399 24409 24418 24430 24448-24449 24460-24462 24472 24474-24475 24488-24489 24491 24496-24498 24505-24508 24521-24524 24528 25426 25430 25442 25448 25553 25624 25645 25857 25868 25888 26195 26253-26254 26376 26932 26967 27107 27256 27402 27483 27501 27649 27657 27667 27678 27699 28197 29358-29359 29780 29952 30767 42827 42852-42853 42910 42918 42921 42923 42944 42963 42965 42972 42987 44124 44221 44244-44245 44291 44308-44309 44330 44336 44346 44352 44357 44371 44376 44407 44421 44433-44434 44441 44453 44464 44484 44494 44564 44611 44621 44641 44651 44676 44693 44699 44711-44713 44722 44761 44773 44785 44788 44802 44822 44833-44834 44932 48253 48316 48326 48337 48352 48355 48457 48469 48477 48512 48517 48533 48562 48566 48577 48586 48591 48613 48621 48628-48629 48657 48663 48668 48697 48701 48727-48728 48741 48761 48856 48858 48867 48883 48885 48891 48893 48910 48922 48943 48950 48962 48964 48993 49006 49047 49052 49069 49076https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/429/119?format=asciidefaultJ/MNRAS/429/119/table1Basic properties of the CP1 and CP3 stars identified as constant or for which the quality of the data prevented the detection of any variabilityrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameNamemeta.idcharR09Identification number by Renson & Manfroid (2009A&A...498..961R, Cat. III/260, Renson NNNNN in Simbad)meta.id;meta.mainintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainVmagAverage V magnitudemagphot.mag;em.opt.VfloatSpTypeMK spectral type from Renson & Manfroid 2009A&A...498..961R, Cat. III/260)src.spTypecharClassCP classification (G3)meta.code.classcharvsini? Average projected rotational velocitykm/sphys.veloc.rotat;stat.meanfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlchare_vsini? rms uncertainty on vsinikm/sstat.error;phys.veloc.rotatfloatnullableo_vsini[1/7]? Number of averaged vsinimeta.numberintnullableJ/MNRAS/429/119/table2Basic properties of the CP1 and CP3 stars identified as constant or probably constant after the individualized analysisSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameNamemeta.idcharR09Identification number by Renson & Manfroid (2009A&A...498..961R, Cat. III/260)meta.id;meta.mainintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainVmagAverage V magnitudemagphot.mag;em.opt.VfloatSpTypeMK spectral type from Renson & Manfroid (2009A&A...498..961R, Cat. III/260)src.spTypecharClassCP classification (G3)meta.code.classcharPer? Perioddtime.periodfloatnullablee_Per? rms uncertainty on Perdstat.errorfloatnullableRem[WBSC ] Analysis remark (G1)meta.notecharr_PlitReference for literature period (G2)meta.ref;pos.framecharPlit? Literature perioddtime.periodfloatnullablevsini? Average projected rotational velocitykm/sphys.veloc.rotat;stat.meanfloatnullablee_vsini? rms uncertainty on vsinikm/sstat.error;phys.veloc.rotatfloatnullableo_vsini[1/4]? Number of averaged vsinimeta.numberintnullableJ/MNRAS/429/119/table3Properties of the CP1 and CP3 stars identified as photometrically variablee_Perrms uncertainty on Perdstat.errordoublePer2? Second perioddtime.periodfloatnullablePer3? Third perioddtime.periodfloatnullableMJD? MJD of the epoch for the first recorded maximumdtime.epochdoublenullableRem[WBS* ] Analysis remark (G1)meta.notecharPlitReference for literature period with literature period(s) (G2)time.periodcharvsini? Average projected rotational velocitykm/sphys.veloc.rotat;stat.meanfloatnullablee_vsini? rms uncertainty on vsinikm/sstat.error;phys.veloc.rotatfloatnullableo_vsini[1/5]? Number of averaged vsinimeta.numberintnullableTeff? Effective temperatureKphys.temperature.effectiveintnullablee_Teff? rms uncertainty on TeffKstat.error;phys.temperature.effectiveintnullableSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameNamemeta.idcharR09Identification number by Renson & Manfroid (2009A&A...498..961R, Cat. III/260)meta.id;meta.mainintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainVmagAverage V magnitudemagphot.mag;em.opt.VfloatSpTypeMK spectral type from Renson & Manfroid (2009A&A...498..961R, Cat. III/260)src.spTypecharClassCP classification (G3)meta.code.classcharPerPerioddtime.periodfloato_Teff[1/99]? Number of averaged temperature (99 when Teff from Netopil et al., 2008A&A...491..545N)meta.numberintnullablelogL? Luminositylog(solLum)phys.luminosityfloatnullablee_logL? rms uncertainty on logLlog(solLum)stat.errorfloatnullablen_logL[T] TAMS stage (1)meta.notecharMass? MasssolMassphys.massfloatnullablee_Mass? rms uncertainty on MasssolMassstat.error;phys.massfloatnullabletau[0/1]? Fractional age {tau} (fraction of main sequence lifetime completed) (1)time.agefloatnullablee_tau? rms uncertainty on taustat.errorfloatnullable