J/ApJ/698/865ivo://CDS.VizieR/J/ApJ/698/865doi:10.26093/cds/vizier.16980865CDSKlement R.Rix H.-W.Flynn C.Fuchs B.Beers T.C.Allende Prieto C.,Bizyaev D.Brewington H.Lee Y.S.Malanushenko E.Malanushenko V.,Oravetz D.Pan K.Re Fiorentin P.Simmons A.Snedden S.2017-08-29T14:37:48Z2011-09-20T13:16:44ZCDS support team

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

cds-question@unistra.frmetallicityvisible-astronomysloan-photometryhalo-starsradial-velocitystellar-distanceWe have detected stellar halo streams in the solar neighborhood using data from the seventh public data release of the Sloan Digital Sky Survey (SDSS), which includes the directed stellar program Sloan Extension For Galactic Understanding and Exploration (SEGUE). In order to derive distances to each star, we used the metallicity-dependent photometric parallax relation from Ivezic et al. (2008ApJ...684..287I). Our final sample consists of 22321 nearby (d<=2kpc), metal-poor ([Fe/H]<=-0.5) main-sequence stars with six-dimensional estimates of position and space velocity (r{vec},{nu}{vec}). We characterize the orbits of these stars through suitable kinematic proxies for their "effective" integrals of motion, angular momentum, eccentricity, and orbital polar angle and compare the observed distribution to expectations from a smooth distribution in four [Fe/H] bins. The metallicities provide an additional dimension in parameter space that is well suited to distinguish tidal streams from those of dynamical origin. On this basis, we identify at least five significant "phase-space overdensities" of stars on very similar orbits in the solar neighborhood to which we can assign unambiguously peaked [Fe/H] distributions. Three of them have been identified previously, including the halo stream discovered by Helmi et al. (1999MNRAS.307..495H) at a significance level of {sigma}=12.0. In addition, we find at least two new genuine halo streams, judged by their kinematics and [Fe/H], at {sigma}=2.9 and 4.8, respectively.2009ApJ...698..865Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/698/865CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)J/AJ/136/2070 : SEGUE stellar parameter pipeline. III. (Allende Prieto+, 2008)J/AJ/134/1579 : Halo stars in solar neighborhood (Kepley+, 2007)http://www.sdss.org/ : Sloan Digital Sky Survey (SDSS) home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/698/865https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/698/865http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/698/865https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/698/865https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/698/865http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/698/865GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/698/865/table3 (Putative members of the identified streams: astrophysical parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/698/865/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/698/865/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/698/865/table3?GETtext/xml+votable180.050000true9.873181414.59725580.0055555555555555566/50 65 66 712 715 727 899 910 920 993 2064 2065 2090 2291 2297 4135 4164 4166 4229 4230 4250 4254 4285 4290 4540 4542 4707 4761 4854 4942 5101 5116 5166 5235 5354 5365 5505 5594 5688 5703 5715 5784 5859 5894 5900 5910 5913 6016 6149 6164 6271 6303 6384 6399 6448 6454 6455 6512 6568 6742 7161 7167 7169 7318 7486 7553 8404 8539 8722 8916 9004 9437 9605 9629 9926 9962 10025 10146 10147 10389 10408 10753 10851 11147 11573 11575 12379 12405 13328 13330 13332 13778 15897 17406 17513 17514 17516 17746 17747 17752 17753 17774 17807 17816 17828 17829 17837 17906 17912 18004 18014 18017 18065 18067 18068 18071 18073 18096 18113 18114 18157 18159 18235 18388 18391 18416 18546 18765 18767 18777 18778 18779 18852 18854 18855 18857 18926 18949 19046 19052 19093 19116 19268 19425 19539 19596 19632 19727 19738 19749 19751 19940 20461 21953 22010 23051 23065 24400 25289 26112 26288 26975 26995 27023 27029 27047 27058 27060 27236 27243 27245 27249 27284 27320 27453 27522 27567 27589 27602 27636 27816 27904 28157 28159 28160 28162 28544 30040 31325 31406 31621 31707 32443 32478 32501 32536 32555 36781 36786 491292.040811542443644e-19 6.090060298487514e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/698/865?format=asciiOpticaldefaultJ/ApJ/698/865/table2Main characteristics of the stellar streams considered realSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStreamStream designationmeta.id;meta.maincharAutAuthor's referencemeta.bib.authorcharBibCodeBibcode referencemeta.bib.bibcodecharVazAzimuthal velocity (V_az_) (1)km/sphys.velocintVdelEV_{Delta}E_ parameter (2)km/sphys.velocintnuOrbital inclination ({nu})degsrc.orbital.inclinationintSigSignificance of the stream obtained as described in Section 6stat.fit.goodnessfloatNNumber of putative stream membersmeta.numberint<[Fe/H]>Mean metallicity of the streamlog(Sun)phys.abund.Fefloate_<[Fe/H]><[Fe/H]> standard deviationlog(Sun)stat.error;phys.abund.FefloatJ/ApJ/698/865/table4Putative members of the identified streams: photometry and velocitiesSDSSSDSS name (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharumagSDSS u-band AB magnitudemagphot.mag;em.opt.UfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStreamStream designation (G1)meta.id.parentchargmagSDSS g-band AB magnitudemagphot.mag;em.opt.BfloatrmagSDSS r-band AB magnitudemagphot.mag;em.opt.Rfloati'magSDSS i'-band AB magnitudemagphot.mag;em.opt.Ifloatz'magSDSS z'-band AB magnitudemagphot.mag;em.opt.IfloatDistEstimated distancekpcpos.distance;pos.heliocentricfloate_Dist1{sigma} error in Distkpcstat.errorfloatHRVHeliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloatUU component radial velocity (1)km/spos.cartesian.xfloatVV component radial velocitykm/spos.cartesian.yfloatWW component radial velocity (1)km/spos.cartesian.zfloatJ/ApJ/698/865/table3Putative members of the identified streams: astrophysical parametersSimbadNameSimbad column added by the CDSmeta.idcharPlateSDSS platemeta.noteintSDSSSDSS name (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharprimaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStreamStream designation (G1)meta.id.parentcharn_SDSSmeta.ref.urlcharMJDSDSS modified Julian datetime.epochintFiberSDSS fibermeta.noteint[Fe/H]Fe/H abundancelog(Sun)phys.abund.Fefloate_[Fe/H]Fe/H uncertainty (1)log(Sun)stat.error;phys.abund.FefloatTeffEffective temperatureKphys.temperature.effectiveinte_TeffTeff uncertainty (1)Kstat.error;phys.temperature.effectiveintloggSurface gravitylog(cm.s**-2)phys.gravityfloate_logglogg uncertainty (1)log(cm.s**-2)stat.errorfloatDR7Data from SDSS-DR7 photometric catalog (Adelman-McCarthy 2009, Cat. II/294)meta.ref.urlcharSloanDisplay the SDSS spectrum for this starmeta.ref.urlcharRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.main