J/A+A/585/A141ivo://CDS.VizieR/J/A+A/585/A141doi:10.26093/cds/vizier.35850141CDSGrosboel P.2016-01-15T13:13:40Z2016-01-12T08:22:15ZCDS support team

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

cds-question@unistra.frsurveysgalaxy-planesmilky-way-galaxyearly-type-starsextinctionspectroscopyIt is still unclear whether the Sagittarius spiral arm is a major spiral arm in the Galaxy or whether it just outlines a region of enhanced star formation because of the local compression of gas. The best way to separate these scenarios out is to study the kinematics across the arm to determine the velocity perturbation it induces. A survey of early-type stars in the direction of the Galactic center is performed covering an area of 100 sq. deg with the aim of identifying candidates for a radial velocity study. Objective prism plates were obtained with the 4{deg} prism on the ESO Schmidt telescope using IIaO, 4415, and IIIaJ emulsions. The plates were digitized and more than 100k spectra were extracted down to a limiting magnitude of B=15m. The spectra were cross-correlated with a template with Balmer lines, which yielded a candidate list of 12675 early-type stars. Magnitudes and equivalent widths of strong lines were calculated from the spectra, which allowed us to estimate the individual extinctions and distances for 11075 stars.2016A&A...585A.141Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/585/A141CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/585/A141https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/585/A141http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/585/A141https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/585/A141https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/585/A141http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/585/A141GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/585/A141/ets_tgc (Catalog of early-type stars toward the Galactic center)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/585/A141/ets_tgc?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/585/A141/ets_tgc?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/585/A141/ets_tgc?GETtext/xml+votable180.050000true261.28845-28.822390.0055555555555555564/1801 1803-1804 5/7181-7183 7194 7201-7203 7208-7209 7211 7222 7224-7226 7300-7301 6/28702-28703 28717-28719 28721-28723 28768 28770-28771 28780 28782-28783 28801-28803 28880 28882-28883 28894 28908-28910 28912-28914 29189 29212-29213 29248-29250 42461 42463 424854.0234554602041486e-19 4.920466254354166e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/585/A141?format=asciiOpticaldefaultJ/A+A/585/A141/ets_tgcCatalog of early-type stars toward the Galactic centerrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintOPSObjective Prism Survey identifier, HHMMSSs+ddMMSS (J2000)meta.id;meta.maincharRAJ2000Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainIdScanScan identifiermeta.notecharspShow the spectrummeta.ref.urlcharBmag[9/17.5] Johnson B-band magnitude (apparent)magphot.mag;em.opt.BfloatU-B[-2.3/2.7]? Johnson (U-B) indexmagphot.color;em.opt.U;em.opt.Bfloatnullableu-v[-0.7/5.6]? Stroemgren (u-v) indexmagphot.color;em.opt.U;em.opt.Bfloatnullablev-b[-0.1/1.3]? Stroemgren (v-b) indexmagphot.color;em.opt.B;em.opt.BfloatnullableEWHg[0.1/3.3] Equivalent width of H{gamma}-linenmspect.line.eqWidthfloatEWHd[0.1/3.0] Equivalent width of H{delta}-linenmspect.line.eqWidthfloatEWHe[0.0/2.6] Equivalent width of H{epsilon}-linenmspect.line.eqWidthfloatEWCa[0.0/3.0] Equivalent width of CaII K-linenmspect.line.eqWidthfloatAV[-0.31/6.1]? Extinction in Vmagphys.absorption;em.opt.VfloatnullablelogTe[3.7/4.9]? Effective temperaturelog(K)phys.temperature.effectivefloatnullabledBmag[-1.2/0] Magnitude above ZAMS in Johnson B filtermagphot.mag;arith.difffloatBMAG[-11/5.4]? Absolute Magnitude in Johnson B filtermagphys.magAbs;em.opt.BfloatnullableDist[0.06/172]? Distance from Sunkpcpos.distance;pos.heliocentricfloatnullableStart[-8300/-3120] Start of spectral scan relative to H{gamma}umpos;arith.difffloatStep[10] Step size of spectral scanumphys.angSize;instr.pixelint