J/AJ/162/117ivo://CDS.VizieR/J/AJ/162/117doi:10.26093/cds/vizier.51620117CDSBarnes III T.G.Guggenberger E.Kolenberg K.2022-03-21T12:54:18Z2021-12-21T08:37:18ZCDS support team

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

cds-question@unistra.frvariable-starsmultiple-starsradial-velocityvisible-astronomyspectroscopyWe report 272 radial velocities for 19 RR-Lyrae variables. For most of the stars we have radial velocities for the complete pulsation cycle. These data are used to determine robust center-of-mass radial velocities that have been compared to values from the literature in a search for evidence of binary systems. Center-of-mass velocities were determined for each star using Fourier Series and template fits to the radial velocities. Our center-of-mass velocities have uncertainties from {+/-}0.16km/s to {+/-}2.5km/s, with a mean uncertainty of {+/-}0.92km/s. We combined our center-of-mass velocities with values from the literature to look for deviations from the mean center-of-mass velocity of each star. Fifteen RR-Lyrae show no evidence of binary motion (BK And, CI And, Z CVn, DM Cyg, BK Dra, RR Gem, XX Hya, SZ Leo, BX Leo, TT Lyn, CN Lyr, TU Per, U Tri, RV UMa, and AV Vir). In most cases this conclusion is reached due to the sporadic sampling of the center-of-mass velocities over time. Three RR Lyrae show suspicious variation in the center-of-mass velocities that may indicate binary motion but do not prove it (SS Leo, ST Leo, and AO Peg). TU UMa was observed by us near a predicted periastron passage (at 0.14 in orbital phase) but the absence of additional center-of-mass velocities near periastron makes the binary detection, based on radial velocities alone, uncertain. Two stars in our sample show H{gamma} emission in phases 0.9-1.0: SS Leo and TU UMa.2021AJ....162..117Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/162/117CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/gcvs : General Catalogue of Variable Stars (Samus+, 2007-2017)II/264 : ASAS Variable Stars in Southern hemisphere (Pojmanski+, 2002-2005)J/A+A/589/A94 : TU UMa light curves and maxima, CL Aur minima (Liska+, 2016)J/MNRAS/459/4360 : Field RR Lyrae stars (Liska+, 2016)J/AJ/153/96 : Standard Galactic field RRLyrae. I. Photometry (Monson+, 2017)J/A+A/623/A116 : Galactic Cepheids & RRLyrae multiplicity. I. (Kervella+, 2019)J/A+A/623/A117 : Galactic Cepheids & RRLyrae multiplicity. II (Kervella+, 2019)J/ApJ/863/151 : Period analysis of 7 field RRab stars (Li+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/162/117https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/162/117http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/162/117https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/162/117https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/162/117http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/162/117GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/162/117/table2 (Observed RR Lyrae stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/162/117/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/162/117/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/162/117/table2?GETtext/xml+votable180.050000true28.78458343.7655560.0055555555555555566/2173 2484 3176 6301 7174 10862 11098 12696 13171 13647 16022 26515 26981 27474 27824 28227 28582 32254 40722https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/162/117?format=asciiOpticaldefaultJ/AJ/162/117/table2Observed RR Lyrae starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar identifiermeta.refcharprimaryRAJ2000[1/23] Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainVmagmin[9.26/12.4] Minimum V-band magnitudemagfloatVmagmax[10.2/13.5] Maximum V-band magnitudemagfloatHJD[36079/56751] Time of maximum light; HJD-2400000ddoublePer[0.36/0.66] Perioddmeta.refdoubleRefReference usedmeta.refTintIntegration timescharNRVelNumber of radial velocity measurements (table3)meta.refintnullableNoldNumber of old center of mass radial velocity measurements (table5)meta.refintnullableCMRVelCenter of Mass radial velocity measured (table4)meta.refcharRVelInteractive Plotmeta.refcharJ/AJ/162/117/table3Radial velocities of RR LyraerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStarcharHJD[6717/8391] Heliocentric Julian (mid-point) Date; HJD-2450000ddoublePhase[0/1] Phase, cyclesfloatRVel[-306/196] Heliocentric Radial velocitykm/sdoublee_RVel[0.2/21] Uncertainty in RVelkm/sfloatJ/AJ/162/117/table4New center-of-mass radial velocitiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStarcharHJD[6732/8391] Heliocentric Julian Date (mean); HJD-2450000ddoubleRVel[-309/172] Center of mass ({gamma}) radial velocitykm/sfloate_RVel[0.1/3]? Uncertainty in GRVkm/sfloatnullableTypeType of FitcharJ/AJ/162/117/table5Historical center of mass radial velocitiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStarcharFlagFlag (1)charJD[2422765/2458391]? Julian DatedintnullableRVel[-380/187] Center of mass heliocentric radial velocitykm/sfloate_RVel[0.1/47] Uncertainty in RVelkm/sfloatO-C[-117/385]? Residualkm/sfloatnullabler_RVelReference for RVelJ/AJ/162/117/refsReferences usedBIBBIBcodecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRef[1/31] Reference codeintAutorMain autorcharCat.Vizier catalogcharNoteAdditional notechar