J/A+A/507/833ivo://CDS.VizieR/J/A+A/507/833doi:10.26093/cds/vizier.35070833CDSMegier A.Strobel A.Galazutdinov G.A.Krelowski J.2017-11-10T11:15:50Z2010-04-08T14:02:57ZCDS support team

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

cds-question@unistra.fropen-star-clustersearly-type-starsline-intensitiesstellar-distanceWe attempt to extend the relation between the strengths of the interstellar CaII lines and the distances to early-type stars to objects beyond 1 kiloparsec, with the line saturation taken into account. We measure the CaII K and CaII H equivalent widths, and compute Ca II column densities for 262 lines of sight towards early-type stars with available Hipparcos parallaxes (pi). The targets are located within a few hundred parsecs of the Galactic plane, and span all the range of Galactic longitudes. We fit the N_CaII_ - parallax relation with a function of the form pi=1/(a.N_CaII_+b), using a maximum-likelihood approach to take account of errors in both variables. We use the resultant formula to estimate distances to stars in OB associations and clusters, and compare them to those found in the literature, usually estimated by spectrophotometric methods.2009A&A...507..833Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/507/833CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/239 : The Hipparcos and Tycho Catalogues (ESA 1997)J/AJ/117/354 : OB associations from Hipparcos (de Zeeuw+, 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/507/833https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/507/833http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/507/833https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/507/833https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/507/833http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/507/833GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/507/833/table1 (Target stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/507/833/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/507/833/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/507/833/table1?GETtext/xml+votable180.050000true274.678345-13.7806610.0055555555555555566/1060 1196 1198 1203 1293 1323 1539 1549-1550 1554-1555 1558 1633 1748 1929 1960 2884 3030 3060 3137 3251 3258 3305 3430 3491 3606 3626 3816 9478 9680 12972 12988 13255 13268 13557 13733 14008 14015 14167 14197 14279 14286 14368 14431 14459 14484 14636 14645-14646 14690-14691 14712 14788 14793 14824 15375 15392 15478 15486 15573 15577 15580 15625 15631 15656 15672 15677 15683 15745 15747 20613 20764 20800 20860 20975 21365 21401 21439 21515 21530-21531 21635 21644 21647 21671 22039 22216 22223 22240 22246 22249 22253 22258 22615 22850 22854 22862 22911 23007 23374 23637 23769 23774 23851 23979 24338 24340 24370 25659 27402 27498 28809 28890-28891 28900 28915 28968 29036 29085 29097 29463 29513 29537 29600 29621 29876 29893 30722 30818 31063 31121 31759 32174 32513 32793 37145 37316 37333 37364 37370 37584 37716 37802 37865 37896-37897 37900-37901 37903 37905 37926 37932 37948 38016 38022 38073 38452 39179 39187 39216 39243 39252 39374 39397 39679 39696 39704 39715 39803 39806 39840 39916 39922 39971 41445 41464 41520 41610 41615 41630-41631 41651 41692 41747 41757 41812 41924 42080 42113 42116 42183 42190 42213-42214 42221 42236-42237 42283 42303 42383 42394-42395 42405 42408 42410 42416-42417 42439 42444 42464 42470 42477 42483 42618 42764 42932 42959 42977 42981 43011 43018 43024 43062 43086 43088 43383 43460 43521 43531 44306 44312 44316 44360 44366 44378 44385-44386 44389 47648https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/507/833?format=asciiOpticaldefaultJ/A+A/507/833/table1Target starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharGLONGalactic longitude (from SIMBAD)degpos.galactic.lonGLATGalactic latitude (from SIMBAD)degpos.galactic.latplx? Trigonometric parallax (Hipparcos)maspos.parallax.trigfloatnullablee_plx? rms uncertainty on plxmasstat.error;pos.parallaxfloatnullableEWKEquivalent width of the CaII K line0.1pmspect.line.eqWidth;em.IR.Kinte_EWKrms uncertainty on EWK0.1pmstat.errorfloatEWHEquivalent width of the CaII H line0.1pmspect.line.eqWidth;em.IR.Hinte_EWHrms uncertainty on EWK0.1pmstat.errorfloatNCaIICaII column density1e+12cm**-2phys.columnDensityfloate_NCaIIrms uncertainty on NCaII1e+12cm**-2stat.errorfloatAssosAssociation membershipmeta.code.membercharr_AssosReference for association membership (1)meta.ref;pos.framecharDH? Association distance from Humphreys (1978ApJS...38..309H)pcpos.distance;pos.heliocentricintnullableDGS? Association distance from Garmany & Stencel (1992A&AS...94..211G)pcpos.distance;pos.heliocentricintnullableDZ? Association distance from de Zeeuw et al. (1999, Cat. J/AJ/117/354)pcpos.distance;pos.heliocentricintnullableDCaIIDistance estimated from formula (3)pcpos.distance;pos.heliocentricinte_DCaII? rms uncertainty pn DCaIIpcstat.errorintnullableSimbadSimbad column added by the CDSmeta.refchar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexed