J/ApJ/703/2177ivo://CDS.VizieR/J/ApJ/703/2177doi:10.26093/cds/vizier.17032177CDSSchlaufman K.C.Rockosi C.M.Prieto C.A.Beers T.C.Bizyaev D.,Brewington H.Lee Y.S.Malanushenko V.Malanushenko E.Oravetz D.,Pan K.Simmons A.Snedden S.Yanny B.2011-12-15T21:21:10Z2011-11-23T07:39:01ZCDS support team

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

cds-question@unistra.frmilky-way-galaxychemically-peculiar-starsWe identify 10 -- seven for the first time -- elements of cold halo substructure (ECHOS) in the volume within 17.5kpc of the Sun in the inner halo of the Milky Way. Our result is based on the observed spatial and radial velocity distribution of metal-poor main-sequence turnoff (MPMSTO) stars in 137 Sloan Extension for Galactic Understanding and Exploration lines of sight. We show that all of our detections are statistically significant and that we expect no false positives. These ECHOS represent the observable stellar debris of ancient merger events in the stellar accretion history of the Milky Way, and we use our detections and completeness estimates to infer a formal upper limit of 0.34^+0.02^_-0.02_ on the fraction of the MPMSTO population in the inner halo that belong to ECHOS.2009ApJ...703.2177Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/703/2177CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)J/AJ/137/4377 : List of SEGUE plate pairs (Yanny+, 2009)J/AJ/136/2070 : SEGUE stellar parameter pipeline. III. (Allende Prieto+, 2008)J/AJ/136/2050 : SEGUE stellar parameter pipeline. II. (Lee+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/703/2177https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/703/2177http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/703/2177https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/703/2177https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/703/2177http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/703/2177GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/703/2177/table4 (Summary of completeness calculation)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/703/2177/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/703/2177/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/703/2177/table4?GETtext/xml+votable180.050000true207.218.60.0055555555555555566/28 48 715 727 908 996 2066 2094 2207 2296 2299 4107 4141 4166 4537 4769 4796 4822 4950 4967 5106 5202 5249 5354 5434 5891 5907 6095 6219 6301 6384 6392 6454 6568 7250 7320 7515 7553 7784 8127 8164 8265 8353 8517 8671 8846 9156 9583 9607 9863 10144 10410 10535 10619 10823 10914 10989 11137 11225 11331 11448 11453 11572 11601 11882 12391 12662 13329 13415 13648 16187 17231 17370 17513 17516 17561 17817 17830 17907 18010 18069 18170 18235 18388 18523 18777 18854 19113 19269 19332 19411 19599 19691 19760 19777 19941 20169 20251 20285 20455 21783 22740 23054 23057 23193 23209 23274 23343 23467 25291 25334 25530 26115 26169 26202 26262 26266 26282 26467 26537 26981 27045 27238 27454 27643 27818 28006 28075 28266 30041 32447 32501 32536 32558 32699 36781 49017https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/703/2177?format=asciiOpticaldefaultJ/ApJ/703/2177/table4Summary of completeness calculationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latfloatNs[10/173] Number of spectra obtained along that line of sight that lie in the inner halo as defined in Section 2meta.numberintNpNumber of photometrically classified MPMSTO stars in the volume scanned by SEGUE along that line of sight that lie in the inner halo as defined in Section 2 (1)meta.numberintVolVolumekpc**3floatl_ObLimit flag on Obmeta.code.errorcharOb[0/1] Fraction of total MPMSTO spectra sample that must belong to a single cold element of substructure for it to be classified as a bin detection 95% of the time (1)stat.likelihoodfloatl_OILimit flag on OImeta.code.errorcharOI[0/1] Fraction of total MPMSTO spectra sample that must belong to a single cold element of substructure for it to be classified as a class I detection 95% of the time (1)stat.likelihoodfloatl_OIILimit flag on OIImeta.code.errorcharOII[0/1] Fraction of total MPMSTO spectra sample that must belong to a single cold element of substructure for it to be classified as a class II detection 95% of the time (1)stat.likelihoodfloatComComment (Strm = stream)meta.notechar