J/AJ/155/171ivo://CDS.VizieR/J/AJ/155/171doi:10.26093/cds/vizier.51550171CDSKunder A.Mills A.Edgecomb J.Thomas M.Schilter L.Boyle C.,Parker S.Bellevue G.Rich R.M.Koch A.Johnson C.I.Nataf D.M.2019-01-07T09:02:53Z2018-11-27T13:14:38ZCDS support team

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

cds-question@unistra.frmilky-way-galaxyglobular-star-clustersvariable-starsradial-velocityinfrared-photometryvisible-astronomyphotometrystellar-distanceDetailed elemental abundance patterns of metal-poor ([Fe/H]~-1 dex) stars in the Galactic bulge indicate that a number of them are consistent with globular cluster (GC) stars and may be former members of dissolved GCs. This would indicate that a few per cent of the Galactic bulge was built up from destruction and/or evaporation of GCs. Here, an attempt is made to identify such presumptive stripped stars originating from the massive, inner Galaxy GC NGC 6441 using its rich RR Lyrae variable star (RRL) population. We present radial velocities of 40 RRLs centered on the GC NGC 6441. All 13 of the RRLs observed within the cluster tidal radius have velocities consistent with cluster membership, with an average radial velocity of 24+/-5 km/s and a star-to-star scatter of 11 km/s. This includes two new RRLs that were previously not associated with the cluster. Eight RRLs with radial velocities consistent with cluster membership but up to three time the distance from the tidal radius are also reported. These potential extra-tidal RRLs also have exceptionally long periods, which is a curious characteristic of the NGC 6441 RRL population that hosts RRLs with periods longer than seen anywhere else in the Milky Way. As expected of stripped cluster stars, most are inline with the cluster's orbit. Therefore, either the tidal radius of NGC 6441 is underestimated and/or we are seeing dissolving cluster stars stemming from NGC 6441 that are building up the old spheroidal bulge.2018AJ....155..171Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/155/171CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/213 : OGLE Galactic Bulge periodic variables (Udalski+ 1996)V/150 : Updated catalog of variable stars in globular clusters (Clement+ 2017)J/AJ/117/1313 : NGC 6441 VI photometry (Layden+, 1999)J/ApJ/651/197 : OGLE fundamental-mode RR Lyrae in Galactic BulgeJ/A+A/464/953 : Abundances of red giants in NGC 6441 (Gratton+, 2007)J/other/PZP/9.5 : I light curves of RR Lyrae from OGLE II (Bernhard+, 2009)J/AcA/61/1 : VI light curves of Galactic Bulge RR Lyrae (Soszynski+, 2011)J/AcA/64/177 : VI light curves of Galactic Bulge RR Lyrae (Soszynski+, 2014)J/ApJ/821/L25 : Bulge RR Lyrae Radial Velocity Assay (BRAVA-RR)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/155/171https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/155/171http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/155/171https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/155/171https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/155/171http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/155/171GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/155/171/table1 (RR Lyrae stars in and around NGC 6441)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/155/171/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/155/171/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/155/171/table1?GETtext/xml+votable180.050000true267.555411-37.0461620.0055555555555555566/28705 28707https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/155/171?format=asciiInfraredOpticaldefaultJ/AJ/155/171/table1RR Lyrae stars in and around NGC 6441recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintOGLE[3168/31080] OGLE identifier (OGLE BLG-RRLYR-NNNNN in Simbad)meta.id;meta.mainintn_OGLE[o] Note on OGLE (o=Star outside the cluster tidal radius)meta.notecharGLON[-6.6981/-6.2304] OGLE Galactic longitudedegpos.galactic.lonGLAT[-5.4911/-4.7158] OGLE Galactic latitudedegpos.galactic.latHRV[-207/360] Time averaged heliocentric radial velocity HRV_{phi}_ (1)km/sphys.veloc;pos.heliocentricinte_HRV[5/15] Uncertainty in HRVkm/sstat.errorinto_HRV[1/3] Number of epochs to get HRVmeta.numberintIAmp[0.11/0.82] OGLE I band amplitudemagsrc.var.amplitudefloatImagmean[14.552/16.663] OGLE mean I band magnitudemagphot.mag;em.opt.IfloatVmagmean[15.781/17.752] OGLE mean V band magnitudemagphot.mag;em.opt.VfloatPer[0.44560223/0.90449519] OGLE perioddtime.perioddoubler[0.57/30.66] Distance from cluster centerarcminpos.angDistancefloatNoteAdditional note (2)meta.noteSimbadSimbad column added by the CDSmeta.ref.urlchar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexed