J/ApJ/782/59ivo://CDS.VizieR/J/ApJ/782/59doi:10.26093/cds/vizier.17820059CDSGovea J.Gomez T.Preston G.W.Sneden C.2017-07-05T07:00:04Z2016-02-26T09:39:27ZCDS support team

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

cds-question@unistra.frvariable-starsradial-velocitychemical-abundancesWe present a detailed chemical abundance study of eight RR Lyrae variable stars of subclass c (RRc). The target RRc stars chosen for study exhibit "Blazhko-effect" period and amplitude modulations to their pulsational cycles. Data for this study were gathered with the echelle spectrograph of the 100 inch du Pont telescope at Las Campanas Observatory. Spectra were obtained throughout each star's pulsation cycle. Atmospheric parameters--effective temperature, surface gravity, microturbulent velocity, and metallicity--were derived at multiple phase points. We found metallicities and element abundance ratios to be constant within observational uncertainties over the pulsational cycles of all stars. Moreover, the {alpha}-element and Fe-group abundance ratios with respect to iron are consistent with other horizontal-branch members (RRab, blue and red non-variables). Finally, we have used the [Fe/H] values of these eight RRc stars to anchor the metallicity estimates of a large-sample RRc snapshot spectroscopic study being conducted with the same telescope and instrument combination employed here.2014ApJ...782...59Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/782/59CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/264 : ASAS Variable Stars in Southern hemisphere (Pojmanski+, 2002-2005)J/ApJS/197/29 : Chemical compositions of 11 RR Lyrae (For+, 2011)J/MNRAS/377/1263 : Multiperiodic RR Lyrae in ASAS catalog (Szczygiel+, 2007)J/AJ/110/2319 : Abundances in RR Lyr variables (Clementini+ 1995)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/782/59https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/782/59http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/782/59https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/782/59https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/782/59http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/782/59GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/782/59/stars (Photometric data , and average abundances for the program stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/782/59/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/782/59/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/782/59/stars?GETtext/xml+votable180.050000true124.8868681-23.96940250.0055555555555555566/25120 31498 40475 40924 40952 45994 46482 489163.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/782/59?format=asciiOpticaldefaultJ/ApJ/782/59/abundFe abundances , abundance ratios [X/Fe] for elements Na through Ti , and for elements Cr through Tio_[SiI/Fe][1/2]? Number of lines for [SiI/Fe]meta.numberintnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar identifier (abbreviated ASAS name)meta.id;meta.maincharPhase[0/1] Mean phase of co-added spectrum {Phi} (G1)time.phasefloatTeff[6800/7500] Effective temperatureKphys.temperature.effectiveintlogg[1.8/2.7] Log surface gravitylog(cm.s**-2)phys.gravityfloatVt[1.5/2.7] Microturbulent velocitykm/sphys.velocfloat[M/H][-3/-1.5] Assumed model metallicitylog(Sun)phys.abund.Z;meta.modelledfloat[FeI/H][-3.1/-1.4] Derived log [FeI/H] abundancelog(Sun)phys.abundfloato_[FeI/H][4/97] Number of lines for [FeI/H]meta.numberinte_[FeI/H][0.09/0.33] Standard deviation of [FeI/H]log(Sun)stat.error;phys.abundfloat[FeII/H][-3.1/-1.4] Derived log [FeII/H] abundancelog(Sun)phys.abundfloato_[FeII/H][4/43] Number of lines for [FeII/H]meta.numberinte_[FeII/H][0.08/0.39] Standard deviation of [FeII/H]log(Sun)stat.error;phys.abundfloat[Na/Fe][-0.31/0.83]? Relative abundance ratio [Na/Fe]log(Sun)phys.abundfloatnullableo_[Na/Fe][1/3]? Number of lines for [Na/Fe]meta.numberintnullablee_[Na/Fe][0/0.63]? Sample standard deviation of [Na/Fe]log(Sun)stat.error;phys.abundfloatnullable[Mg/Fe][-0.1/0.9] Relative abundance ratio [Mg/Fe]log(Sun)phys.abund;arith.ratiofloato_[Mg/Fe][2/6] Number of lines for [Mg/Fe]meta.numberinte_[Mg/Fe][0/0.8] Sample standard deviation of [Mg/Fe]log(Sun)stat.error;phys.abundfloat[Al/Fe][-1/0.1]? Relative abundance ratio [Al/Fe]log(Sun)phys.abundfloatnullableo_[Al/Fe][1/2]? Number of lines for [Al/Fe]meta.numberintnullablee_[Al/Fe][0/0.6]? Sample standard deviation of [Al/Fe]log(Sun)stat.error;phys.abundfloatnullable[SiI/Fe][-0.8/1.4]? Relative abundance ratio [SiI/Fe]log(Sun)phys.abundfloatnullablee_[SiI/Fe][0/1.4]? Sample standard deviation of [SiI/Fe]log(Sun)stat.error;phys.abundfloatnullable[SiII/Fe][-0.5/1.6]? Relative abundance ratio [SiII/Fe]log(Sun)phys.abundfloatnullableo_[SiII/Fe][1/5]? Number of lines for [SiII/Fe]meta.numberintnullablee_[SiII/Fe][0/0.9]? [SiII/Fe] sample standard deviationlog(Sun)stat.error;phys.abundfloatnullable[CaI/Fe][-0.2/0.7] Relative abundance ratio [CaI/Fe]log(Sun)phys.abundfloato_[CaI/Fe][1/14] Number of lines for [CaI/Fe]meta.numberinte_[CaI/Fe][0/0.5] Sample standard deviation of [CaI/Fe]log(Sun)stat.error;phys.abundfloat[ScII/Fe][-0.4/0.4]? Relative abundance ratio [ScII/Fe]log(Sun)phys.abundfloatnullableo_[ScII/Fe][1/6]? Number of lines for [ScII/Fe]meta.numberfloatnullablee_[ScII/Fe][0/0.8]? [ScII/Fe] sample standard deviationlog(Sun)stat.error;phys.abundfloatnullable[TiII/Fe][0.09/0.6] Relative abundance ratio [TiII/Fe]log(Sun)phys.abundfloato_[TiII/Fe][10/35] Number of lines for [TiII/Fe]meta.numberinte_[TiII/Fe][0.1/0.5] [TiII/Fe] sample standard deviationlog(Sun)stat.error;phys.abundfloat[CrI/Fe][-0.6/0.8]? Relative abundance ratio [CrI/Fe]log(Sun)phys.abundfloatnullableo_[CrI/Fe][1/6]? Number of lines for [CrI/Fe]meta.numberintnullablee_[CrI/Fe][0/0.6]? Sample standard deviation of [CrI/Fe]log(Sun)stat.error;phys.abundfloatnullable[CrII/Fe][-0.2/0.4]? Relative abundance ratio [CrII/Fe]log(Sun)phys.abundfloatnullableo_[CrII/Fe][1/8]? Number of lines for [CrII/Fe]meta.numberintnullablee_[CrII/Fe][0/0.4]? [CrII/Fe] sample standard deviationlog(Sun)stat.error;phys.abundfloatnullable[NiI/Fe][0.44/0.45]? Relative abundance ratio [NiI/Fe]log(Sun)phys.abundfloatnullableo_[NiI/Fe][1/1]? Number of lines for [NiI/Fe]meta.numberintnullablee_[NiI/Fe][0/0]? Sample standard deviation of [NiI/Fe]log(Sun)stat.error;phys.abundfloatnullable[SrII/Fe][-0.5/1.5]? Relative abundance ratio [SrII/Fe]log(Sun)phys.abundfloatnullableo_[SrII/Fe][1/2]? Number of lines for [SrII/Fe]meta.numberintnullablee_[SrII/Fe][0/1.07]? [SrII/Fe] sample standard deviationlog(Sun)stat.error;phys.abundfloatnullable[YII/Fe][-0.3/0.9]? Relative abundance ratio [YII/Fe]log(Sun)phys.abundfloatnullableo_[YII/Fe][1/3]? Number of lines for [YII/Fe]meta.numberintnullablee_[YII/Fe][0/0.6]? Sample standard deviation of [YII/Fe]log(Sun)stat.error;phys.abundfloatnullable[BaII/Fe][-0.2/0.6]? Relative abundance ratio [BaII/Fe]log(Sun)phys.abundfloatnullableo_[BaII/Fe][1/1]? Number of lines for [BaII/Fe]meta.numberintnullablee_[BaII/Fe][0/0]? Sample standard deviation of [BaII/Fe]log(Sun)stat.error;phys.abundfloatnullableJ/ApJ/782/59/table2Spectroscopic dataBin[2/6]? Bin sizemeta.numberintnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar identifier (abbreviated ASAS name)meta.id;meta.maincharf_Star[a] Phase excluded from analysismeta.codecharHJD[4903/5462] Heliocentric Julian Date (HJD-2450000.0)dtime.epochdoublePhase[0/1] Phase {Phi} (1)time.phasefloatRV[-177/366] Radial velocitykm/sphys.veloc;pos.heliocentricfloat<Phase>[0/1]? Mean phase <{Phi}>time.phasefloatnullable<RV>[-173/366]? Mean radial velocitykm/sspect.dopplerVeloc;stat.meanfloatnullableS/N1[14/94]? Signal-to-Noise in 4020-4040{AA} region (2)stat.snrintnullableS/N2[52/173]? Signal-to-Noise in 5560-5580{AA} region (2)stat.snrintnullableJ/ApJ/782/59/starsPhotometric data , and average abundances for the program starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintASASASAS identifier of the star (HHMMSS+DDMM.m)meta.id;meta.maincharNameVariable namemeta.idcharVmin[10.5/12.7] Minimum V band magnitude (1)magphot.mag;em.opt.VfloatVmax[10.7/13.1] Maximum V band magnitude (1)magphot.mag;em.opt.VfloatV-K[0.5/0.8] (V-K) color index from ASAS databasemagphot.color;em.opt.V;em.IR.KfloatPer[0.25/0.33] Period from Szczygiel & Fabrycky 2007 (cat. J/MNRAS/377/1263)dtime.perioddoublef_Per[g] Star not included in Szczygiel & Fabrycky 2007 (cat. J/MNRAS/377/1263) (2)meta.codecharPbl[-11.8/10.9]? Blazhko period from Szczygiel & Fabrycky 2007 (cat. J/MNRAS/377/1263) (3)dtime.periodfloatnullableSF07Display the data from Szczygiel & Fabrycky 2007 (cat. J/MNRAS/377/1263)meta.numberintnullableT0[1869.7/2174.7] Epoch of light minimum (from our study)dtime.epochfloatClassASAS suggested stellar classification (4)src.classcharSimbadSimbad column added by the CDSmeta.ref.urlcharVPVelocity Plotmeta.ref.urlcharStarStar identifier (abbreviated ASAS name)meta.idcharTeff[7100/7400] Effective temperature (1)Kphys.temperature.effectiveintlogg[2/2.5] Log surface gravity (1)log(cm.s**-2)phys.gravityfloatVt[1.7/2.6] Microturbulent velocity (1)km/sphys.velocfloat<[FeI/H]>[-2.9/-1.5] Average FeI/H abundance ratiolog(Sun)phys.abundfloat<[FeII/H]>[-3/-1.4] Average FeII/H abundance ratiolog(Sun)phys.abundfloat<[NaI/Fe]>[-0.2/0.6] Average NaI/H abundance ratiolog(Sun)phys.abundfloat<[MgI/Fe]>[0.2/0.7] Average MgI/H abundance ratiolog(Sun)phys.abundfloat<[AlI/Fe]>[-0.8/-0.3] Average AlI/Fe abundance ratiolog(Sun)phys.abundfloat<[SiI/Fe]>[-0.35/0.31] Average SiI/Fe abundance ratiolog(Sun)phys.abundfloat<[SiII/Fe]>[0.04/1.22] Average SiII/Fe abundance ratiolog(Sun)phys.abundfloat<[CaI/Fe]>[0.15/0.43] Average CaI/Fe abundance ratiolog(Sun)phys.abundfloat<[ScII/Fe]>[-0.04/0.26] Average ScII/Fe abundance ratiolog(Sun)phys.abundfloat<[TiII/Fe]>[0.22/0.43] Average TiII/Fe abundance ratiolog(Sun)phys.abundfloat<[CrI/Fe]>[-0.19/0.01] Average CrI/Fe abundance ratiolog(Sun)phys.abundfloat<[CrII/Fe]>[-0.03/0.3]? Average CrII/Fe abundance ratiolog(Sun)phys.abundfloatnullable<[NiI/Fe]>[0.44/0.45]? Average NiI/Fe abundance ratiolog(Sun)phys.abundfloatnullable<[SrII/Fe]>[-0.1/1.1] Average SrII/Fe abundance ratiolog(Sun)phys.abundfloat<[YII/Fe]>[-0.3/0.35]? Average YII/Fe abundance ratiolog(Sun)phys.abundfloatnullable<[BaII/Fe]>[-0.15/0.4]? Average BaII/Fe abundance ratiolog(Sun)phys.abundfloatnullable_RAPositions from SIMBAD database (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD database (declination part)degpos.eq.dec;meta.main