RR Lyrae variable stars in DES Y6 J/ApJ/911/109 ivo://CDS.VizieR/J/ApJ/911/109 doi:10.26093/cds/vizier.19110109 CDS Stringer K.M. Drlica-Wagner A. Macri L. Martinez-Vazquez C.E.,Vivas A.K. Ferguson P. Pace A.B. Walker A.R. Neilsen E. Tavangar K.,Wester W. Abbott T.M.C. Aguena M. Allam S. Bacon D. Bechtol K.,Bertin E. Brooks D. Burke D.L. Carnero Rosell A. Carrasco Kind M.,Carretero J. Costanzi M. Crocce M. da Costa L.N. Pereira M.E.S.,De Vicente J. Desai S. Diehl H.T. Doel P. Ferrero I. Garcia-Bellido J.,Gaztanaga E. Gerdes D.W. Gruen D. Gruendl R.A. Gschwend J.,Gutierrez G. Hinton S.R. Hollowood D.L. Honscheid K. Hoyle B.,James D.J. Kuehn K. Kuropatkin N. Li T.S. Maia M.A.G. Marshall J.L.,Menanteau F. Miquel R. Morgan R. Ogando R.L.C. Palmese A.,Paz-Chinchon F. Plazas A.A. Roodman A. Sanchez E. Schubnell M.,Serrano S. Sevilla-Noarbe I. Smith M. Soares-Santos M. Suchyta E.,Tarle G. Thomas D. To C. Varga T.N. Wilkinson R.D. Zhang Y.,The DES Collaboration 2023-08-16T15:16:40Z 2022-11-14T12:42:01Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr variable-stars infrared-photometry visible-astronomy Wide-band photometry extinction astronomical-object-identification We present a search for RR Lyrae stars using the full six-year data set from the Dark Energy Survey covering ~5000deg^2^ of the southern sky. Using a multistage multivariate classification and light-curve template-fitting scheme, we identify RR Lyrae candidates with a median of 35 observations per candidate. We detect 6971 RR Lyrae candidates out to ~335kpc, and we estimate that our sample is >70% complete at ~150kpc. We find excellent agreement with other wide-area RR Lyrae catalogs and RR Lyrae studies targeting the Magellanic Clouds and other Milky Way satellite galaxies. We fit the smooth stellar halo density profile using a broken-power-law model with fixed halo flattening (q=0.7), and we find strong evidence for a break at R_0_=32.1_-0.9_^+1.1^kpc with an inner slope of n_1_=-2.54_-0.09_^+0.09^ and an outer slope of n_2_=-5.42_-0.14_^+0.13^. We use our catalog to perform a search for Milky Way satellite galaxies with large sizes and low luminosities. Using a set of simulated satellite galaxies, we find that our RR Lyrae-based search is more sensitive than those using resolved stellar populations in the regime of large (rh>=500pc), low-surface-brightness dwarf galaxies. A blind search for large, diffuse satellites yields three candidate substructures. The first can be confidently associated with the dwarf galaxy Eridanus II. The second has a distance and proper motion similar to the ultrafaint dwarf galaxy Tucana II but is separated by ~5 deg. The third is close in projection to the globular cluster NGC 1851 but is ~10 kpc more distant and appears to differ in proper motion. 2021ApJ...911..109S https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/911/109 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to II/347 : KiDS-ESO-DR3 multi-band source catalog (de Jong+, 2017) II/357 : The Dark Energy Survey (DES): Data Release 1 (Abbott+, 2018) I/345 : Gaia DR2 (Gaia Collaboration, 2018) V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020) VII/289 : SDSS quasar catalog, sixteenth data release (DR16Q) (Lyke+, 2020) II/371 : The Dark Energy Survey (DES): Data Release 2 (Abbott+, 2021) J/AcA/51/221 : OGLE-II. Cepheids in IC 1613 (Udalski+, 2001) J/AJ/123/840 : VI photometry of variable stars in Fornax (Bersier+, 2002) J/AJ/127/1158 : QUEST RR Lyrae Survey first catalog (Vivas+, 2004) J/AJ/132/714 : QUEST RR Lyrae survey. II. Halo overdensities (Vivas+, 2006) J/MNRAS/398/1757 : RR Lyraes in SDSS stripe 82 (Watkins+, 2009) J/ApJ/712/1259 : LCID project. II. Variables in IC1613 (Bernard+, 2010) J/ApJ/708/717 : Light curve templates of RR Lyrae stars (Sesar+, 2010) J/ApJ/731/4 : Galactic halo as seen by the CFHTLS (Sesar+, 2011) J/A+A/544/A73 : BVI photometry of Fornax dSph galaxy (de Boer+, 2012) J/ApJ/753/106 : Quasar variability with SDSS & POSS imaging (MacLeod+, 2012) J/AJ/144/4 : Dwarf galaxies in the Local Group (McConnachie+, 2012) J/ApJ/763/32 : Galactic halo RRab stars from CSS (Drake+, 2013) J/ApJ/765/154 : RR Lyrae stars in the Catalina Sky Survey (Drake+, 2013) J/AJ/145/160 : Variables in LMC GCs. III. Reticulum (Kuehn+, 2013) J/ApJS/213/9 : Catalina Surveys periodic variable stars (Drake+, 2014) J/ApJ/788/105 : XSTPS RR Lyrae in the north Galactic cap (Faccioli+, 2014) J/ApJ/793/135 : Positions and distances of RR Lyrae stars (Sesar+, 2014) J/ApJ/793/62 : Triangulum-Andromeda stellar properties (Sheffield+, 2014) J/PASP/126/616 : Variable stars in Leo I dSph (Stetson+, 2014) J/ApJ/781/22 : Region I of La Silla QUEST RR Lyrae stars (Zinn+, 2014) J/A+A/584/A106 : Catalogues of variable AGNs (Simm+, 2015) J/MNRAS/446/2251 : Southern Catalina Survey type-ab RR Lyrae (Torrealba+, 2015) J/ApJ/817/73 : QSOs & RR Lyrae in PS1 3{pi} Data (Hernitschek+ 2016) J/MNRAS/462/4349 : Variable stars in Sculptor dSph (Martinez-Vazquez+, 2016) J/MNRAS/469/3688 : CSS Periodic Variable Star Catalogue (Drake+, 2017) J/AJ/154/263 : NIR photometry of 77 RR Lyrae stars (Karczmarek+, 2017) J/ApJ/850/137 : ISLAndS project. III. Var. stars (Martinez-Vazquez+, 2017) J/AJ/153/204 : RR Lyrae stars from the PS1 3{pi} survey (Sesar+, 2017) J/AJ/153/107 : Australian Dark Energy Survey (OzDES) QSO cat. (Tie+, 2017) J/AJ/154/85 : CTIO/DECam photometry of RR Lyrae stars in M5 (Vivas+, 2017) J/MNRAS/474/4112 : Candidate RR Lyr star streams in inner Galaxy (Mateu+, 2018) J/ApJ/855/43 : Distant RR Lyrae stars discovered with HiTS (Medina+, 2018) J/MNRAS/480/669 : Variable stars in the SMCNOD (Prudil+, 2018) J/A+A/622/A60 : Gaia DR2 misclassified RR Lyrae list (Clementini+, 2019) J/A+A/624/A13 : KiDS DR3 QSO catalog (Nakoneczny+, 2019) J/ApJ/875/77 : PMs of MW satellites with Gaia & DES (Pace+, 2019) J/AJ/158/223 : RR Lyrae members of Pal 5 stream (Price-Whelan+, 2019) J/AJ/158/16 : Identification of RR Lyrae stars from DES (Stringer+, 2019) J/ApJ/893/47 : MW satellite census. I. DES & PS1 (Drlica-Wagner+, 2020) J/A+A/638/A104 : GaiaDR2 cand. RR Lyrae of Sgr stream & dwarf (Ramos+, 2020) J/ApJ/892/137 : Spectroscopy of Grus II, Tuc IV and Tuc V (Simon+, 2020) http://www.sdss.org/ : SDSS home page http://des.ncsa.illinois.edu/releases/other/y6-rrl : DES Y6 RR Lyrae home page https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/911/109 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/911/109 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/911/109 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/911/109 https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/911/109 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/911/109 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/ApJ/911/109/table1 (The Dark Energy Survey (DES) Y6 RRab candidates) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/911/109/table1? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/911/109/table1? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/911/109/table1? 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46692-46694 46696-46697 46701-46702 46705 46721-46726 46728 46730 46748-46750 46760 46762-46765 46768-46769 46784 46786 46848-46850 47361 47363 47365 47369 47372 47376-47378 47389 47391 47428-47429 47431 47444 47446-47450 47452 47456-47457 47459-47462 47465 47469 47472-47474 48128-48130 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/911/109?format=ascii Optical Infrared default J/ApJ/911/109/table1 The Dark Energy Survey (DES) Y6 RRab candidates recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int ID [871765223/1700521769] DES Y6A1 Coadd Object ID meta.id;meta.main long RAJ2000 Right Ascension, decimal degrees (J2000) deg pos.eq.ra;meta.main DEJ2000 [-67/5] Decination, decimal degrees (J2000) deg pos.eq.dec;meta.main Ag [0.01/0.55] Extinction, g band (1) mag phys.absorption float Ar [0.008/0.4] Extinction, r band (1) mag phys.absorption float Ai [0.006/0.3] Extinction, i band (1) mag phys.absorption float Az [0.004/0.21] Extinction, z band (1) mag phys.absorption float AY [0.004/0.18] Extinction, Y band (1) mag phys.absorption float gmag0 [14.15/23.44]? Mean g-band magnitude with extinction correction mag phot.mag;em.opt.B float nullable rmag0 [14.38/23.3]? Mean r-band magnitude with extinction correction mag phot.mag;em.opt.R float nullable imag0 [14.43/23.2]? Mean i-band magnitude with extinction correction mag phot.mag;em.opt.I float nullable zmag0 [14.19/23.01]? Mean z-band magnitude with extinction correction mag phot.mag;em.opt.I float nullable Ymag0 [13.87/22.34]? Mean Y-band magnitude with extinction correction mag phot.mag;em.IR.J float nullable Nobs [10/73] Number of Observations meta.number int Per [0.3/1] Best fit period d time.period;meta.modelled float SimbadName Simbad column added by the CDS meta.id char nullable Amp [0.14/1.93] Best-fit model amplitude mag src.var.amplitude;meta.modelled float mu [13.26/22.61] Best-fit distance modulus mag phot.mag.distMod float RF1 [0.75/1] Score from first random forest classifier (variability) stat.fit.goodness float RF2 [0.34/1] Score from second random forest classifier (variability) stat.fit.goodness float RF3 [0.6/1] Score from third random forest classifier (template fit) stat.fit.goodness float GaiaDR2 ? Gaia DR2 source_id for cross-matched RRab in Clementini+ (2019, J/A+A/622/A60) meta.id.cross nullable PS1 ? Pan-Starrs PS1 identifier from Sesar+ (2017, J/AJ/153/204) RRab catalog meta.id.cross int nullable CSDR2 ? Catalina Surveys DR2 RRab catalog identifier (2) meta.id.cross nullable DESY3Q2 ? DES Y3Q2 identifier from Stringer+ (2019, J/AJ/158/16) meta.id.cross nullable S09 Display data from Stringer+ 2019, J/AJ/158/16 meta.ref.url int nullable Sys Association with resolved stellar system meta.id.parent char SysID Star identifier in System from previous study meta.id.cross char r_Sys Reference for star in System (3) meta.ref;pos.frame char ACc Anomalous Cepheid candidate ("True"=11 occurrences or "False") meta.code char LC Interactive LC Plot meta.ref.url char