J/AJ/108/1722ivo://CDS.VizieR/J/AJ/108/1722doi:10.26093/cds/vizier.51081722CDSKinman T.D.Suntzeff N.B.Kraft R.P.2023-04-06T16:50:08Z2000-04-14T21:00:30ZCDS support team

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

cds-question@unistra.frhorizontal-branch-starsvisible-astronomyWide-band photometrymedium-band-photometrychemical-abundancesA complete sample of blue horizontal branch (BHB) stars in the magnitude range 13.0<V<16.5 is isolated in two Galactic fields that have previously been searched for RR Lyrae variables: SA 57 in the Northern Polar Cap and the Lick Astrograph field RR 7 in the Anticenter (l=183{deg}, b=+37{deg}). These BHB stars are a subset of the AF stars found in the Case Low-Dispersion Northern Survey; lists of these AF stars were made available by the late Nick Sanduleak. The completeness of the sample was confirmed by reference to the photometric survey of SA 57 by Stobie & Ishida (1987AJ93..... 624S) that is complete to fainter than V=18. In the color range 0.00<(B-V)_0_<+0.20, we can distinguish the BHB stars among these AF stars by comparing them both with well known local field horizontal branch (FHB) stars and also the BHB members of the halo globular clusters M3 and M92. The criteria for this comparison include (1) a (u-B)_K_ color index (derived from photoelectric observations using the Stromgren u filter and the Johnson B and V filters) that measures the size of the Balmer jump, (2) a spectrophotometric index A that measures the steepness of the Balmer jump, and (3) a parameter D_0.2_ that is the mean width of the H{gamma} and H{delta} Balmer lines measured at 20 percent of the continuum level. These criteria give consistent results in separating BHB stars from higher gravity main sequence AF stars in the color range 0.00<(B-V)_0_<+0.20. All three photometric and spectrophotometric criteria were measured for 35 stars in the SA 57 field and 37 stars in the RR 7 field that are in the color range (B-V)_0_<+0.23 and in the magnitude range 13.0<V<16.5. For a small number of additional stars only (u-B)_K_ was obtained. Among the AF stars that are fainter than B=13 and bluer than (B-V)_0_=+0.23, about half of those in the SA 57 field and about one third of those in the lower latitude RR 7 field are BHB stars. Isoabundance contours were located empirically in plots of the pseudoequivalent width versus (B-V)_0_ for the lines of Mg II A4481{AA}, Ca II A3933 {AA} and Fe I A4272{AA}. Solar abundances were defined by the data from main sequence stars in the Pleiades and Coma open clusters. Data from the BHB stars in M3 and M92 defined the [Fe/H]=1.5 and -2.2 isoabundance contours, respectively. Metallicities of all stars were estimated by interpolating the measured pseudoequivalent widths in these diagrams at the observed (B-V)_0_. The distribution of [Fe/H] found for the BHB stars in this way is very similar to that which we found for the RR Lyrae stars in the same fields using the Preston AS method. The space densities of these BHB stars were analyzed both separately and together with earlier observations of field BHB stars given by Arnold & Gilmore (1992MNRAS.257..225A), Sommer-Larsen & Christensen (1986MNRAS.219..537S), and Preston et al. (1991ApJ...375..121P). This analysis supports a two-component model for the halo of our Galaxy that is similar in many respects to that proposed by Hartwick [The Galaxy (Reidel, Dordrecht 1987)] although our discussion refers only to the region outside the solar circle. For Z>=35kpc, a classical spherical halo dominates which follows a R_gal_^-3.5^ space-density law and which has a HB morphology like that of the globular cluster M3 (i.e., approximately equal numbers of BHB and RR Lyrae stars). Closer to the galactic plane, there is an additional component with a much flatter galactic distribution (scale height ~2.2kpc near the Sun). The stars of the two components do not have significantly different metallicity distributions but do have slightly different distributions of the A parameter which measures the steepness of the Balmer jump; this is the only physical criterion (independent of spatial or kinematic considerations) which distinguishes between the two components. If present estimates of the local RR Lyrae star space density are correct, then the ratio of BHB stars to RR Lyrae stars is higher in the flatter halo component. The flat component would then have a bluer HB morphology (which could be interpreted as making it older) than the spherical component. In the solar neighborhood about 80 percent of the BHB stars come from the flat component and about 20 percent from the spherical component. More than half of the AF stars with V>13.0 and (B-V)_0_<+0.23 are not BHB stars but have surface gravities that are more like those expected for main sequence stars. Their measured metallicities lie in the range -0.2<[Fe/H]<-2.3. The more metal-poor of these stars are probably similar to the blue metal-poor stars that have been discussed by Preston et al. (1994AJ....108..538P) which, while they probably include globular cluster blue stragglers as a subset, must also comprise stars of other types.1994AJ....108.1722Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/108/1722CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/108/1722https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/108/1722http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/108/1722https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/108/1722https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/108/1722http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/108/1722GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/108/1722/table1 (SA 57 field stars identifications and positions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/108/1722/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/108/1722/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/108/1722/table1?GETtext/xml+votable180.050000true193.07812228.3324280.005555555555555556Cone search capability for table J/AJ/108/1722/table2 (RR7 field stars identifications and positions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/108/1722/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/108/1722/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/108/1722/table2?GETtext/xml+votable180.050000true125.30387338.6132720.0055555555555555565/1607 1617-1618 1620 1624 2593 2598 2600-2601 2603 6/5099-5101 5103 5114 6452-6453 6465-6467 6476-6477 6479 6484 6486 6488 6491-6492 6500-6502 6505 6512 10287 10298 10371 10377-10378 10381-10385 10387 10390 10396 10398-10399 10409 10411 10416-10418 10420 281493.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/108/1722?format=asciiOpticaldefaultJ/AJ/108/1722/table1SA 57 field stars identifications and positionsSeqSequential numbermeta.id;meta.mainintprimaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCaseCase identification (1)meta.idcharOtherIDOther identifications (2)meta.idcharVmagV magnitudemagphot.mag;em.opt.Vfloatn_Vmag[:v)] v: variable; : and ): uncertainty flagmeta.notecharRA1950Right ascension (1950)pos.eq.ra;meta.mainDE1950Declination (1950)pos.eq.dec;meta.main_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexedJ/AJ/108/1722/table2RR7 field stars identifications and positionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential numbermeta.id;meta.mainintprimaryCaseCase identification (1)meta.idcharOtherIDOther identifications (2)meta.idcharVmagV magnitudemagphot.mag;em.opt.Vfloatn_Vmag[:v)] v: variable; : and ): uncertainty flagmeta.notecharRA1950Right ascension (1950)pos.eq.ra;meta.mainDE1950Declination (1950)pos.eq.dec;meta.main_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexedJ/AJ/108/1722/table3SA 57 photoelectric and spectrophotometric datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential numbermeta.id;meta.mainintprimaryVmagV magnitudemagphot.mag;em.opt.Vfloatn_Vmag[v:] v: variable, ':' uncertainty flagmeta.notecharB-V? B-V colour indexmagphot.color;em.opt.B;em.opt.Vfloatnullable(u-B)K? (u-B)_K_ colour indexmagphot.color;em.opt.U;em.opt.BfloatnullableDBmag? Amplitude variation in B wavelengthmagphot.mag;arith.difffloatnullablen,m? Local standards (1)meta.codecharn_n,m[S] S = standardmeta.notecharPCG? Pseudo-continuum gradient (2)phot.flux;meta.modelledfloatnullableBJA? Difference between bandpass 1 and bandpass 2magphot.colorfloatnullablelambda0.5? Wavelength of mean fluxes F1 and F2 (3)0.1nmem.wl;stat.meanfloatnullableLAMBDA? BHB star discriminant (4)stat.fit.paramfloatnullableJ/AJ/108/1722/table4RR 7 Photoelectric and spectrophotometric datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential numbermeta.id;meta.mainintprimaryVmagV magnitudemagphot.mag;em.opt.Vfloatn_Vmag[v] v: Variabilitymeta.notecharB-VB-V colour indexmagphot.color;em.opt.B;em.opt.Vfloat(u-B)K? (u-B)_K_ colour indexmagphot.color;em.opt.U;em.opt.BfloatnullableDBmag? Amplitude variation in B wavelengthmagphot.mag;arith.difffloatnullablen,m? Local standard (1)meta.codecharn_n,m[S] S: standardmeta.notechar(B-V)0Dereddened B-V colour indexmagphot.color;em.opt.B;em.opt.Vfloat(u-B)K0? Dereddened (u-B)_K_ colour indexmagphot.color;em.opt.U;em.opt.BfloatnullablePCG? Pseudo-continuum gradientphot.flux;meta.modelledfloatnullableBJA? Difference between bandpass 1 and bandpass 2magphot.colorfloatnullablePCG0? Dereddened pseudo-continuum gradientphot.flux;meta.modelledfloatnullableBJA0? Dereddened BJAmagphot.colorfloatnullablelambda0.5? Wavelength of mean fluxes (as in table3)0.1nmem.wl;stat.meanfloatnullableLAMBDA? BHB star discriminantstat.fit.paramfloatnullableJ/AJ/108/1722/table5SA 57 spectroscopic datau_EWMgUncertainty flag on EWMgmeta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqIdentification numbers from Tables 1 and 2meta.id;meta.mainintprimaryn_Seq[*] *: horizontal branch starmeta.notecharVmagV magnitudemagphot.mag;em.opt.Vfloatn_Vmag[:v] v: variable, ':' Uncertainty flagmeta.notechar(B-V)0? Dereddened B-V colour indexmagphot.color;em.opt.B;em.opt.VfloatnullableEWHMean equivalent width of H{gamma} and H{delta} as defined in text.0.1nmspect.line.eqWidth;em.line.Hdelta;stat.meanfloatbetaPhotometric index beta derived from EWH (see text).magspect.indexfloatD0.2? Mean width of H{gamma} and H{delta} at 20% of continuum level.0.1nmspect.line.width;em.line.Hdelta;stat.meanfloatnullableEWCaEquivalent width of Ca II K-line as defined in text.0.1nmspect.line.eqWidthfloatEWFe? Equivalent width of Fe I lambda 4272 line.0.1nmspect.line.eqWidth;em.opt.Ifloatnullableu_EWFeUncertainty flagmeta.code.errorcharEWMg? Equivalent width of MgII lambda 4481 line.0.1nmspect.line.eqWidthfloatnullable[Fe/H]Ca? Abundance derived from EWca.log(Sun)phys.abundfloatnullableu_[Fe/H]CaUncertainty flag on [Fe/H]Cameta.code.error;phys.abund.Fecharl_[Fe/H]Fe[<=] Limit flag on [Fe/H]Femeta.code.error;phys.abund.Fechar[Fe/H]Fe? Abundance derived from EWFe.log(Sun)phys.abundfloatnullableu_[Fe/H]FeUncertainty flag on [Fe/H]Femeta.code.error;phys.abund.Fechar[Fe/H]Mg? Abundance derived from EWMg.log(Sun)phys.abundfloatnullableu_[Fe/H]MgUncertainty flag on [Fe/H]Mgmeta.code.error;phys.abund.Fechar[Fe/H]mMean of abundances [Fe/H]Ca ,[Fe/H]Fe and [Fe/H]Mglog(Sun)phys.abund;stat.meanfloatu_[Fe/H]mUncertainty flag on [Fe/H]mmeta.code.error;phys.abund.ZcharRVRadial velocitykm/sphys.veloc;pos.heliocentricintJ/AJ/108/1722/table6RR 7 spectroscopic datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqIdentification numbers from Tables 1 and 2meta.id;meta.mainintprimaryn_Seq[*] *: horizontal branch starmeta.notecharVmagV magnitudemagphot.mag;em.opt.Vfloatn_Vmag[:v] v: variable, ':' Uncertainty flagmeta.notechar(B-V)0? Dereddened B-V colour indexmagphot.color;em.opt.B;em.opt.VfloatnullableEWHMean equivalent width of H{gamma} and H{delta} as defined in text.0.1nmspect.line.eqWidth;em.line.Hdelta;stat.meanfloatbetaPhotometric index beta derived from EWH (see text).magspect.indexfloatD0.2? Mean width of H{gamma} and H{delta} at 20% of continuum level.0.1nmspect.line.width;em.line.Hdelta;stat.meanfloatnullableEWCaEquivalent width of Ca II K-line as defined in text.0.1nmspect.line.eqWidthfloatEWFe? Equivalent width of Fe I lambda 4272 line.0.1nmspect.line.eqWidth;em.opt.Ifloatnullableu_EWFeUncertainty flagmeta.code.errorcharEWMg? Equivalent width of MgII lambda 4481 line.0.1nmspect.line.eqWidthfloatnullableu_EWMgUncertainty flag on EWMgmeta.code.errorchar[Fe/H]Ca? Abundance derived from EWca.log(Sun)phys.abundfloatnullableu_[Fe/H]CaUncertainty flag on [Fe/H]Cameta.code.error;phys.abund.Fecharl_[Fe/H]Fe[<=] Limit flag on [Fe/H]Femeta.code.error;phys.abund.Fechar[Fe/H]Fe? Abundance derived from EWFe.log(Sun)phys.abundfloatnullableu_[Fe/H]FeUncertainty flag on [Fe/H]Femeta.code.error;phys.abund.Fechar[Fe/H]Mg? Abundance derived from EWMg.log(Sun)phys.abundfloatnullableu_[Fe/H]MgUncertainty flag on [Fe/H]Mgmeta.code.error;phys.abund.Fechar[Fe/H]mMean of abundances [Fe/H]Ca ,[Fe/H]Fe and [Fe/H]Mglog(Sun)phys.abund;stat.meanfloatu_[Fe/H]mUncertainty flag on [Fe/H]mmeta.code.error;phys.abund.ZcharRVRadial velocitykm/sphys.veloc;pos.heliocentricintJ/AJ/108/1722/table8RR 7 stars with (B-V)_0_<=0.23 classificationSeqSequential numbermeta.id;meta.mainintprimaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintV0Dereddened V magnitudemagphot.mag;em.opt.Vfloat(B-V)0Dereddened B-V colour indexmagphot.color;em.opt.B;em.opt.VfloatC(u-B)KBHB criteria from (u-B)_K_ (1)phot.colorcharCLAMBDABHB criteria from LAMBDA (1)meta.notecharCD0.2BHB criteria from D0.2 (1)meta.notecharClassAdopted classsrc.classcharn_Class[a] a: probably variable. See Sect.5.1.1.meta.notechar[Fe/H]? Metallicitylog(Sun)phys.abund.Zfloatnullableu_[Fe/H]Uncertainty flag on [Fe/H]meta.code.error;phys.abund.FecharRV? Radial velocitykm/sphys.veloc;pos.heliocentricintnullableVMagAbsolute visual magnitudemagphys.magAbs;em.opt.Vfloatn_VMag[*] Note on the calculation of VMag (2)meta.notecharDistDistancekpcpos.distancefloatZDistance above the galactic planekpcpos.distance;pos.galacticfloatRgDistance from the galactic centerkpcpos.distancefloatJ/AJ/108/1722/table7SA 57 stars with (B-V)_0_<=0.23 classificationRV? Radial velocitykm/sphys.veloc;pos.heliocentricintnullableVMagAbsolute visual magnitudemagphys.magAbs;em.opt.Vfloatn_VMag[*] Note on the calculation of VMag (2)meta.notecharDistDistancekpcpos.distancefloatZDistance above the galactic planekpcpos.distance;pos.galacticfloatRgDistance from the galactic centerkpcpos.distancefloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential numbermeta.id;meta.mainintprimaryV0Dereddened V magnitudemagphot.mag;em.opt.Vfloat(B-V)0Dereddened B-V colour indexmagphot.color;em.opt.B;em.opt.VfloatC(u-B)KBHB criteria from (u-B)_K_ (1)phot.colorcharCLAMBDABHB criteria from LAMBDA (1)meta.notecharCD0.2BHB criteria from D0.2 (1)meta.notecharClassAdopted classsrc.classcharn_Class[a] a: probably variable. See Sect.5.1.1.meta.notechar[Fe/H]? Metallicitylog(Sun)phys.abund.Zfloatnullableu_[Fe/H]Uncertainty flag on [Fe/H]meta.code.error;phys.abund.FecharJ/AJ/108/1722/tablea16Comparison of the photoelectric data with those of other observers for stars in SA 57 fieldrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential numbermeta.id;meta.mainintprimaryn_SeqNotemeta.notecharVmagV magnitude (this paper)magphot.mag;em.opt.VfloatB-VB-V colour index (this paper)magphot.color;em.opt.B;em.opt.Vfloat(u-B)K? (u-B)_K_ colour index (this paper)magphot.color;em.opt.U;em.opt.BfloatnullableVmagH? V magnitude (Harris & Upgren, 1964) (1)magphot.mag;em.opt.VfloatnullableB-VH? B-V colour index (Harris & Upgren, 1964) (1)magphot.color;em.opt.B;em.opt.VfloatnullableU-BH? U-B colour index (Harris & Upgren, 1964) (1)magphot.color;em.opt.U;em.opt.BfloatnullableVmagD? V magnitude (Doinides & Beers, 1991) (2)magphot.mag;em.opt.VfloatnullableB-VD? B-V colour index (Doinides & Beers, 1991) (2)magphot.color;em.opt.B;em.opt.VfloatnullableU-BD? U-B colour index (Doinides & Beers, 1991) (2)magphot.color;em.opt.U;em.opt.BfloatnullableVmagHB? V magnitude (Hill et al., 1982) (3)magphot.mag;em.opt.Bfloatnullableb-yHB? b-y colour index (Hill et al., 1982) (3)magphot.color;em.opt.B;em.opt.Vfloatnullablem1HB? m_1_ colour index (Hill et al., 1982) (3)magphot.colorfloatnullablec1HB? c_1_ colour index (Hill et al., 1982) (3)magphot.colorfloatnullableJ/AJ/108/1722/tablea17Photoelectric and spectrophotometric data for selected stars in the PleiadesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHz(ii)Hertzsprung (1947AnLei..19a...1H) numbermeta.id;meta.mainintHD? HD numbermeta.idintnullableSpTypeSpectral typesrc.spTypecharE(B-V)B-V reddeningmagphot.color.excessfloatu_E(B-V)[)] Uncertainty flag on E(B-V)meta.code.errorcharB-VB-V colour indexmagphot.color;em.opt.B;em.opt.Vfloat(u-B)K? (u-B)_K_ colour indexmagphot.color;em.opt.U;em.opt.Bfloatnullable(B-V)0Dereddened B-V colour indexmagphot.color;em.opt.B;em.opt.Vfloatu_(B-V)0[)] Uncertainty flag on (B-V)0meta.code.errorchar(u-B)K0? Dereddened (u-B)_K_ colour indexmagphot.color;em.opt.U;em.opt.Bfloatnullableu_(u-B)K0[)] Uncertainty flag on (u-B)K0meta.code.errorcharPCG? Pseudo-continuum gradientphot.flux;meta.modelledfloatnullableBJA? Difference between bandpass 1 and bandpass 2magphot.colorfloatnullablePCG0? Dereddened PCGphot.flux;meta.modelledfloatnullableBJA0? Dereddened BJAmagphot.colorfloatnullablelambda0.5? Wavelength of F0.5 (see table3)0.1nmem.wlfloatnullableLAMBDA? BHB star discriminantstat.fit.paramfloatnullableJ/AJ/108/1722/tablea18Photoelectric and spectrophotometric data for selected stars in the Coma Berenices clusterrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTrTrumpler (1938LicOB..18..167T) numbermeta.id;meta.mainintHDHD numbermeta.idintSpTypeSpectral typesrc.spTypecharB-VB-V colour indexmagphot.color;em.opt.B;em.opt.VfloatPCGPseudo-continuum gradientphot.flux;meta.modelledfloatBJADifference between bandpass 1 and bandpass 2phot.colorfloatlambda0.5? Wavelength of F0.5 (see table3)0.1nmem.wlfloatnullableLAMBDA? BHB star discriminantstat.fit.paramfloatnullablen_LAMBDA[b] Note (1)meta.notecharNotesNotesmeta.notecharn_Notes[a] Note (1)meta.notecharJ/AJ/108/1722/tablea19Photoelectric and spectrophotometric data for selected field horizontal branch stars.recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification (1)meta.id;meta.maincharn_IDNote on ID (3)meta.notecharE(B-V)Redenning (2)magphot.color.excessfloat(B-V)0Dereddening B-V colour index (4)magphot.color;em.opt.B;em.opt.Vfloat(u-B)K? (u-B)_K_ colour indexmagphot.color;em.opt.U;em.opt.BfloatnullableN? Number of observationsmeta.numberintnullablePCG0? Dereddened PCGphot.flux;meta.modelledfloatnullableBJA0? Dereddened BJAmagphot.colorfloatnullablelambda0.5? Wavelength of F0.5 (see table3)0.1nmem.wlfloatnullableLAMBDA? BHB star discriminantstat.fit.paramfloatnullableJ/AJ/108/1722/tablea21Photoelectric and spectrophotometric data for selected globular cluster horizontal branch starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification (1)meta.id;meta.maincharn_IDNote on ID (3)meta.notecharE(B-V)Redenning (2)magphot.color.excessfloat(B-V)0Dereddening B-V colour index (4)magphot.color;em.opt.B;em.opt.Vfloat(u-B)K? (u-B)_K_ colour indexmagphot.color;em.opt.U;em.opt.BfloatnullableN? Number of observationsmeta.numberintnullablePCG0? Dereddened PCGphot.flux;meta.modelledfloatnullableBJA0? Dereddened BJAmagphot.colorfloatnullablelambda0.5? Wavelength of F0.5 (see table3)0.1nmem.wlfloatnullableLAMBDA? BHB star discriminantstat.fit.paramfloatnullableJ/AJ/108/1722/tablea30Pleiades selected stars spectroscopic databeta? Calculated photometric index betamagspect.indexfloatnullablen_beta[v] v: variablemeta.notecharbeta1? Phometric index beta literature (3)magspect.indexfloatnullablebeta2? Phometric index beta from Stetson (1991AJ....102..589S)magmeta.code;spect.indexfloatnullableD0.2? Mean width of H{gamma} and H{delta} at 20% of continuum level0.1nmspect.line.width;em.line.Hdelta;stat.meanfloatnullablen_D0.2[v] v: variablemeta.notecharEWCa? Equivalent width of Ca II A39330.1nmspect.line.eqWidthfloatnullablen_EWCa[v] v: variablemeta.notecharEWFe? Equivalent width of Fe I A42720.1nmspect.line.eqWidth;em.opt.Ifloatnullablen_EWFe[v] v: variablemeta.notecharEWMg? Equivalent width of Mg II A44810.1nmspect.line.eqWidthfloatnullablen_EWMg[v] v: variablemeta.notechar[Fe/H]? Abundance assumed for calibration (see text)log(Sun)phys.abundfloatnullable[Fe/H]Ca? Abundance derived from the Ca linelog(Sun)phys.abundfloatnullablen_[Fe/H]Ca[v] v: variablemeta.notechar[Fe/H]Fe? Abundance derived from the Fe linelog(Sun)phys.abundfloatnullablen_[Fe/H]Fe[v] v: variablemeta.notechar[Fe/H]Mg? Abundance derived from the Mg linelog(Sun)phys.abundfloatnullablen_[Fe/H]Mg[v] v: variablemeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification (1)meta.id;meta.maincharHD? HD numbermeta.idintnullablen_IDNote (2)meta.notechar(B-V)0Dereddened B-V colour indexmagphot.color;em.opt.B;em.opt.VfloatEWH? Mean equivalent width of H{gamma} & H{delta}0.1nmspect.line.eqWidth;em.line.Hdelta;stat.meanfloatnullablen_EWH[v] v: variablemeta.notecharJ/AJ/108/1722/tablea31Coma Berenices cluster selected stars spectroscopic dataHD? HD numbermeta.idintnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification (1)meta.id;meta.maincharn_IDNote (2)meta.notechar(B-V)0Dereddened B-V colour indexmagphot.color;em.opt.B;em.opt.VfloatEWH? Mean equivalent width of H{gamma} & H{delta}0.1nmspect.line.eqWidth;em.line.Hdelta;stat.meanfloatnullablen_EWH[v] v: variablemeta.notecharbeta? Calculated photometric index betamagspect.indexfloatnullablen_beta[v] v: variablemeta.notecharbeta1? Phometric index beta literature (3)magspect.indexfloatnullablebeta2? Phometric index beta from Stetson (1991AJ....102..589S)magmeta.code;spect.indexfloatnullableD0.2? Mean width of H{gamma} and H{delta} at 20% of continuum level0.1nmspect.line.width;em.line.Hdelta;stat.meanfloatnullablen_D0.2[v] v: variablemeta.notecharEWCa? Equivalent width of Ca II A39330.1nmspect.line.eqWidthfloatnullablen_EWCa[v] v: variablemeta.notecharEWFe? Equivalent width of Fe I A42720.1nmspect.line.eqWidth;em.opt.Ifloatnullablen_EWFe[v] v: variablemeta.notecharEWMg? Equivalent width of Mg II A44810.1nmspect.line.eqWidthfloatnullablen_EWMg[v] v: variablemeta.notechar[Fe/H]? Abundance assumed for calibration (see text)log(Sun)phys.abundfloatnullable[Fe/H]Ca? Abundance derived from the Ca linelog(Sun)phys.abundfloatnullablen_[Fe/H]Ca[v] v: variablemeta.notechar[Fe/H]Fe? Abundance derived from the Fe linelog(Sun)phys.abundfloatnullablen_[Fe/H]Fe[v] v: variablemeta.notechar[Fe/H]Mg? Abundance derived from the Mg linelog(Sun)phys.abundfloatnullablen_[Fe/H]Mg[v] v: variablemeta.notecharJ/AJ/108/1722/tablea32Field horizontal branch stars spectroscopic datan_IDNote (2)meta.notecharn_EWCa[v] v: variablemeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification (1)meta.id;meta.maincharHD? HD numbermeta.id;meta.mainintnullable(B-V)0Dereddened B-V colour indexmagphot.color;em.opt.B;em.opt.VfloatEWH? Mean equivalent width of H{gamma} & H{delta}0.1nmspect.line.eqWidth;em.line.Hdelta;stat.meanfloatnullablen_EWH[v] v: variablemeta.notecharbeta? Calculated photometric index betamagspect.indexfloatnullablen_beta[v] v: variablemeta.notecharbeta1? Phometric index beta literature (3)magspect.indexfloatnullablebeta2? Phometric index beta from Stetson (1991AJ....102..589S)magmeta.code;spect.indexfloatnullableD0.2? Mean width of H{gamma} and H{delta} at 20% of continuum level0.1nmspect.line.width;em.line.Hdelta;stat.meanfloatnullablen_D0.2[v] v: variablemeta.notecharEWCa? Equivalent width of Ca II A39330.1nmspect.line.eqWidthfloatnullableEWFe? Equivalent width of Fe I A42720.1nmspect.line.eqWidth;em.opt.Ifloatnullablen_EWFe[v] v: variablemeta.notecharEWMg? Equivalent width of Mg II A44810.1nmspect.line.eqWidthfloatnullablen_EWMg[v] v: variablemeta.notechar[Fe/H]? Abundance assumed for calibration (see text)log(Sun)phys.abundfloatnullable[Fe/H]Ca? Abundance derived from the Ca linelog(Sun)phys.abundfloatnullablen_[Fe/H]Ca[v] v: variablemeta.notechar[Fe/H]Fe? Abundance derived from the Fe linelog(Sun)phys.abundfloatnullablen_[Fe/H]Fe[v] v: variablemeta.notechar[Fe/H]Mg? Abundance derived from the Mg linelog(Sun)phys.abundfloatnullablen_[Fe/H]Mg[v] v: variablemeta.notecharJ/AJ/108/1722/tablea33Globular cluster horizontal branch stars spectroscopic datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification (1)meta.id;meta.maincharHD? HD numbermeta.idintnullablen_IDNote (2)meta.notechar(B-V)0Dereddened B-V colour indexmagphot.color;em.opt.B;em.opt.VfloatEWH? Mean equivalent width of H{gamma} & H{delta}0.1nmspect.line.eqWidth;em.line.Hdelta;stat.meanfloatnullablen_EWH[v] v: variablemeta.notecharbeta? Calculated photometric index betamagspect.indexfloatnullablen_beta[v] v: variablemeta.notecharbeta1? Phometric index beta literature (3)magspect.indexfloatnullablebeta2? Phometric index beta from Stetson (1991AJ....102..589S)magmeta.code;spect.indexfloatnullableD0.2? Mean width of H{gamma} and H{delta} at 20% of continuum level0.1nmspect.line.width;em.line.Hdelta;stat.meanfloatnullablen_D0.2[v] v: variablemeta.notecharEWCa? Equivalent width of Ca II A39330.1nmspect.line.eqWidthfloatnullablen_EWCa[v] v: variablemeta.notecharEWFe? Equivalent width of Fe I A42720.1nmspect.line.eqWidth;em.opt.Ifloatnullablen_EWFe[v] v: variablemeta.notecharEWMg? Equivalent width of Mg II A44810.1nmspect.line.eqWidthfloatnullablen_EWMg[v] v: variablemeta.notechar[Fe/H]? Abundance assumed for calibration (see text)log(Sun)phys.abundfloatnullable[Fe/H]Ca? Abundance derived from the Ca linelog(Sun)phys.abundfloatnullablen_[Fe/H]Ca[v] v: variablemeta.notechar[Fe/H]Fe? Abundance derived from the Fe linelog(Sun)phys.abundfloatnullablen_[Fe/H]Fe[v] v: variablemeta.notechar[Fe/H]Mg? Abundance derived from the Mg linelog(Sun)phys.abundfloatnullablen_[Fe/H]Mg[v] v: variablemeta.notecharJ/AJ/108/1722/tablea34Velocity standards and multiple velocity observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGroupGroup (1)meta.idcharObjectObject namemeta.id;meta.mainchar<v>Mean velocitykm/sphys.veloc;stat.meanfloate_<v>? rms uncertainty on <v>km/sstat.errorfloatnullableNobsNumber of observationsmeta.numberintvpub? Published velocitykm/smeta.ref;phys.velocfloatnullabler_vpub? Reference for vpub (2)meta.ref;pos.frameintnullable