Study of RR Lyrae stars in MW substructures J/MNRAS/513/1958 ivo://CDS.VizieR/J/MNRAS/513/1958 doi:10.26093/cds/vizier.75131958 CDS Wang F. Zhang H.-W. Xue X.-X. Huang Y. Liu G.-C. Zhang L. Yang C.-Q. 2025-03-07T20:14:33Z 2025-02-24T15:49:58Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr variable-stars milky-way-galaxy chemically-peculiar-stars astrometry stellar-distance radial-velocity proper-motions metallicity photometry spectroscopy visible-astronomy infrared-astronomy We identify substructures of the Galactic halo using 3003 type ab RR Lyrae stars with six-dimensional position-velocity information from the Sloan Digital Sky Survey, the Large Sky Area Multi-Object Fiber Spectroscopic Telescope and the Gaia Early Data Release 3. Based on this information, we define the separation of any two of the stars in the integrals of motion space and we identify substructures by utilizing the friends-of-friends algorithm. We identify members belonging to several known substructures: the Sagittarius stream, the Gaia- Enceladus-Sausage (GES), the Sequoia and the Helmi streams. In addition to these known substructures, there are three other substructures possibly associated with globular clusters NGC 5272, 6656 and 5024, respectively. Finally, we also find three remaining unknown substructures, one of which has large angular momentum and a mean metallicity -2.13 dex, which may be a new substructure. As for the GES, we find that it accounts for a large part of substructures in the inner halo and the apocentre distance is in the range 10-34 kpc, which suggests that the GES is mainly distributed in the inner halo. The near one-third proportion of the GES and the peak value of 20 kpc of the apocentre distance suggest that the GES could account for the break in the density profile of the Galactic halo at the Galactocentric distance ~20-25 kpc. The similarity when comparing the kinematic properties of the GES with the Hercules-Aquila Cloud and Virgo Overdensity suggests that the three substructures may have similar origins. 2022MNRAS.513.1958W https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/513/1958 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to J/ApJS/247/68 : Probing the Gal. halo with RR Lyrae stars. I. (Liu+, 2020) J/A+A/622/A60 : Gaia DR2 misclassified RR Lyrae list (Clementini+, 2019) II/366 : ASAS-SN catalog of variable stars (Jayasinghe+, 2018-2020) J/AJ/153/204 : RR Lyrae stars from the PS1 3{pi} survey (Sesar+, 2017) V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015) I/350 : Gaia EDR3 (Gaia Collaboration, 2020) 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/ApJS/213/9 : Catalina Surveys periodic variable stars (Drake+, 2014) J/MNRAS/469/3688 : CSS Periodic Variable Star Catalogue (Drake+, 2017) J/MNRAS/446/2251 : Southern Catalina Survey type-ab RR Lyrae (Torrealba+, 2015) J/AJ/146/21 : LINEAR. II. Catalog of RR Lyrae stars (Sesar+, 2013) B/gcvs : General Catalogue of Variable Stars (Samus+, 2007-2017) J/MNRAS/424/2528 : RR Lyrae in SDSS Stripe 82 (Suveges+, 2012) https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/513/1958 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/513/1958 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/513/1958 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/513/1958 https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/513/1958 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/513/1958 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/MNRAS/513/1958/table1 (Parameters and properties of our all 3065 RRab stars) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/513/1958/table1? https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/513/1958/table1? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/513/1958/table1? 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31922 31939 31968 31984 32160 32168 32204 32256 32265 32267 32291 32294 32301 32312 32325 32330-32331 32333 32346 32365 32385 32390 32392 32402 32407 32409 32412 32414 32431 32433 32436 32438-32440 32445-32446 32459 32477-32478 32480-32481 32485 32487-32488 32494 32504 32510 32515 32547 32556 32575 32659 32661-32662 32680 32682 32686 32695-32696 32712 32734 32747 32753 36782 36801-36802 36804 36806 36818 36847 36862 40905 40911 40951 40959 45039 45051 45054 48862 48888-48889 48892 49011 49014-49015 49017 49084 49087 49105 49121 49126 49149 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/513/1958?format=ascii Optical Infrared default J/MNRAS/513/1958/table1 Parameters and properties of our all 3065 RRab stars e_Vlos Mean uncertainty of Vlos (Vlos_err) km/s stat.error float recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int IoM indicates integrals of motion in table 4 meta.ref.url char ID Index ID number (index) meta.id;meta.main int primary RAJ2000 Right ascension (J2000) (ra) deg pos.eq.ra;meta.main DEJ2000 Declination (J2000) (dec) deg pos.eq.dec;meta.main Dist Distance (d) kpc pos.distance float e_Dist Mean uncertainty of d (d_err) kpc stat.error float Vlos Line of sight radial velocity (Vlos) km/s phys.veloc;pos.heliocentric double pmRA Proper motion in right ascension direction (pmra) mas/yr pos.pm;pos.eq.ra float e_pmRA Mean uncertainty of pmRA (pmra_err) mas/yr stat.error;pos.pm;pos.eq.ra float pmDE Proper motion in declination direction (pmdec) mas/yr pos.pm;pos.eq.dec float e_pmDE Mean uncertainty of pmDE (pmdec_err) mas/yr stat.error;pos.pm;pos.eq.dec float [Fe/H] Iron to hydrogen ratio abundance (feh) log(Sun) phys.abund.Fe;arith.ratio float e_[Fe/H] Mean uncertainty of [Fe/H] (feh_err) log(Sun) stat.error;phys.abund.Fe float Per Variation period (period) d arith.rate;time.period double Ref Source reference (source) (1) meta.ref;pos.frame char
J/MNRAS/513/1958/table4 The integrals of motion (IoM) orbital parameters of all RRab stars in the substructures recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int ID Index ID number (index) meta.id;meta.main int l-orb IoM direction of the orbital pole galactic longitude (l_orbit) deg pos.galactic.lon float b-orb IoM direction of the orbital pole galactic latitude (b_orbit) deg pos.galactic.lat float a IoM semimajor axis of the orbit (a) kpc phys.size.smajAxis float e IoM eccentricity (e) src.orbital.eccentricity float l-apo IoM angle between apocenter and the projection of X-axis on the orbital plane (lapo_orbit) deg pos.galactic.lon float E IoM total mechanical energy (E) km**2.s**-2 phys.energy double L IoM angular momentum (L) kpc.km/s phys.angMomentum float Lx IoM x-component of L (Lx) kpc.km/s phys.angMomentum double Ly IoM y-component of L (Ly) kpc.km/s phys.angMomentum double Lz IoM z-component of L (Lz) kpc.km/s phys.angMomentum double Memb [0/10] Index denotes the structure membership (label) (1) meta.code;spect.index int