J/A+A/330/515ivo://CDS.VizieR/J/A+A/330/515doi:10.26093/cds/vizier.33300515CDSFernley J.Barnes T.G.Skillen I.Hawley S.L.Hanley C.J.,Evans D.W.Solano E.Garrido R.2017-12-06T15:17:39Z1998-02-23T12:01:45ZCDS support team

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

cds-question@unistra.frvariable-starsvisible-astronomytrigonometric-parallaxproper-motionsradial-velocitymetallicityWe have used HIPPARCOS proper motions and the method of Statistical Parallax to estimate the absolute magnitude of RR Lyrae stars. In addition we used the HIPPARCOS parallax of RR Lyrae itself to determine it's absolute magnitude. These two results are in excellent agreement with each other and give a zero-point for the RR Lyrae M_v_,[Fe/H] relation of 0.77+/-0.15 at [Fe/H]=-1.53. This zero-point is in good agreement with that obtained recently by several groups using Baade-Wesselink methods which, averaged over the results from the different groups, gives M_v_=0.73+/-0.14 at [Fe/H]=-1.53. Taking the HIPPARCOS based zero-point and a value of 0.18+/-0.03 for the slope of the M_v_,[Fe/H] relation from the literature we find firstly, the distance modulus of the LMC is 18.26+/-0.15 and secondly, the mean age of the Globular Clusters is 17.4+/-3.0 GYrs. These values are compared with recent estimates based on other "standard candles" that have also been calibrated with HIPPARCOS data. It is clear that, in addition to astrophysical problems, there are also problems in the application of HIPPARCOS data that are not yet fully understood.1998A&A...330..515Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/330/515CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/176 : RR Lyrae Metallicities (Layden 1994)VI/45 : A bibliographical catalogue of RR Lyrae stars (Heck 1988)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/330/515https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/330/515http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/330/515https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/330/515https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/330/515http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/330/515GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/330/515/table1 (Basic data)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/330/515/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/330/515/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/330/515/table1?GETtext/xml+votable180.050000true5.9295429.40100720.0055555555555555566/110 1663 2089 2484 2629 4286 4479 4762 4942 6301 6567 6744 7174 7518 8064 8294 8466 8773 9027 9138 9363 9509 9769 9938 10169 10328 10362 10541 10584 10602 10638 10898 10985 11098 11123 11492 11961 12512 12743 12773 13205 13680 14373 14874 15106 15220 15714 16018 16022 16126 16602 16849 16867 16923 17158 17328 18177 19110 19169 19333 20097 20267 20303 20497 21127 21146 21182 21533 21961 22111 24772 24866 25199 25491 25611 25803 25953 26079 26131 26281 26487 26515 26756 26981 27333 27824 27833 27998 28143 28155 28227 28582 28701 30055 30923 31390 31648 31743 31866 32254 32636 32663 33342 33465 33996 34240 34537 35151 35423 35611 35686 36363 36605 36704 36781 38087 38809 39152 40651 40988 40998 41022 41191 41318 42053 42260 42672 43405 44326 44498 45086 45164 45676 45796 46069 46373 47342 47618 47821 48113 48228 48459 48911 48916https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/330/515?format=asciiOpticaldefaultJ/A+A/330/515/table1Basic datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharn_Star[c] c for RRc, else RRab (1)meta.notecharPerPeriod (2)dtime.perioddoubleplxTrigonometric parallax (3)maspos.parallax.trigfloate_plxrms uncertainty on plxmasstat.error;pos.parallaxfloatpmRAProper motion in RA, {mu}_{alpha}_cos{delta} (3)mas/yrpos.pm;pos.eq.rafloate_pmRArms uncertainty on pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDEProper motion in DE, {mu}_{delta}_ (3)mas/yrpos.pm;pos.eq.decfloate_pmDErms uncertainty on pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatVmagV_J_ magnitude (4)magphot.mag;em.opt.VfloatKmag? K magnitudemagphot.mag;em.IR.Kfloatnullabler_Kmag? Reference for K magnitudes (5)meta.ref;pos.frameintnullableE(B-V)Reddeningmagphot.color.excessfloatr_E(B-V)Reference for E(B-V) (6)meta.ref;pos.frameintRVSystemic radial velocitykm/sphys.veloc;pos.heliocentricinte_RVrms uncertainty on RVkm/sstat.errorintr_RVReference(s) for RV (7)meta.ref;pos.framechar[Fe/H]Metallicity (8)log(Sun)phys.abund.Zfloatr_[Fe/H]Reference(s) for [Fe/H] (9)meta.refcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main