J/ApJ/793/135ivo://CDS.VizieR/J/ApJ/793/135doi:10.26093/cds/vizier.17930135CDSSesar B.Banholzer S.R.Cohen J.G.Martin N.F.Grillmair C.J.,Levitan D.Laher R.R.Ofek E.O.Surace J.A.Kulkarni S.R.Prince T.A.,Rix H.-W.2017-07-03T13:19:54Z2017-05-12T15:57:29ZCDS support team

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

cds-question@unistra.frmilky-way-galaxygalaxiesvariable-starsstellar-distanceAlmost every known low-luminosity Milky Way dwarf spheroidal (dSph) satellite galaxy contains at least one RR Lyrae star. Assuming that a fraction of distant (60<d_helio_<100 kpc) Galactic halo RR Lyrae stars are members of yet to be discovered low-luminosity dSph galaxies, we perform a guided search for these low-luminosity dSph galaxies. In order to detect the presence of dSph galaxies, we combine stars selected from more than 123 sightlines centered on RR Lyrae stars identified by the Palomar Transient Factory. We find that this method is sensitive enough to detect the presence of Segue 1-like galaxies (M_V_=-1.5_-0.8_^+0.6^, r_h_=30 pc) even if only ~20 sightlines were occupied by such dSph galaxies. Yet, when our method is applied to the Sloan Digital Sky Survey Data Release 10 imaging catalog, no signal is detected. An application of our method to sightlines occupied by pairs of close (<200 pc) horizontal branch stars, also did not yield a detection. Thus, we place upper limits on the number of low-luminosity dSph galaxies with half-light radii from 30 pc to 120 pc, and in the probed volume of the halo. Stronger constraints on the luminosity function may be obtained by applying our method to sightlines centered on RR Lyrae stars selected from the Pan-STARRS1 survey, and eventually, from the Large Synoptic Survey Telescope. In Appendix A, we present spectroscopic observations of an RRab star in the Bootes 3 dSph and a light curve of an RRab star near the Bootes 2 dSph.2014ApJ...793..135Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/793/135CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/330/515 : RR Lyrae parallaxes + proper motions (Fernley+ 1998)J/A+A/357/871 : RR Lyrae stars in the Sgr dwarf galaxy (Cseresnjes+, 2000)J/AJ/132/1202 : RR Lyrae in Northern Sky Variability Survey (Kinemuchi+, 2006)J/ApJ/740/65 : VLA search for 5GHz radio transients (Ofek+, 2011)J/AJ/146/21 : LINEAR. II. Catalog of RR Lyrae stars (Sesar+, 2013)J/ApJ/763/32 : Galactic halo RRab stars from CSS (Drake+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/793/135https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/793/135http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/793/135https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/793/135https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/793/135http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/793/135GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/793/135/table1 (Positions and distances of RR Lyrae stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/793/135/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/793/135/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/793/135/table1?GETtext/xml+votable180.050000true1.242728063.098036110.0055555555555555566/2109 2135 2148 2207 4115 4334 4360 4674 5407 5416 5434 5507 5526 5697 5707 5949 6057 6546 6564 7373 7409 7463 7524 8230 8339 8634 8868 8894 8907 8921 8934 9191 9217 9280 9655 9773 9856 10242 10358 10362 10460 10485 10541 10543 10596 10599 10678 10705 10755 10787 10812 10869 10873 10976 11074 11250 11284 11381 11882 12115 12300 12305 12354 12363 12400 12608 12621 12626 12632 12636 13344 13405 13406 13430 13453 17364 18152 18167 18224 18612 18666 18696 18723 18927 18943 19074 19232 19238 19242 19279 19280 19283 19388 19416 19423 19425 19431 19463 19600 19645 19691 19762 19765 19863 19916 19944 20007 20228 22495 25590 26339 28023 28522 28543 28564 28614 31355 31640 31739 32394 32450 32480 48991https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/793/135?format=asciidefaultJ/ApJ/793/135/table1Positions and distances of RR Lyrae starsrecnoRecord 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.mainDistHeliocentric distance (1)kpcpos.distancefloat