J/A+A/574/A15ivo://CDS.VizieR/J/A+A/574/A15doi:10.26093/cds/vizier.35740015CDSFernandez-Trincado J.G.Vivas A.K.Mateu C.E.Zinn R.Robin A.C.,Valenzuela O.Moreno E.Pichardo B.2017-07-05T14:20:45Z2017-02-17T08:50:33ZCDS support team

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

cds-question@unistra.frglobular-star-clustersvariable-starsinfrared-photometryvisible-astronomyphotometryWe present a survey of RR Lyrae stars in an area of 50deg^2^ around the globular cluster {omega} Centauri, aimed at detecting debris material from the alleged progenitor galaxy of the cluster. We detected 48 RR Lyrae stars, only 11 of which have been previously reported. Ten of the eleven previously known stars were found inside the tidal radius of the cluster. The rest were located outside the tidal radius up to distances of ~6-degrees from the center of the cluster. Several of these stars are located at distances similar to that of {omega} Centauri. We investigate the probability that they may have been stripped off the cluster. To do this, we studied their properties (mean periods) by calculating the expected halo and thick-disk population of RR Lyrae stars in this part of the sky, analyzing the radial velocity of a sub-sample of the RR Lyrae stars, and finally, studying the probable orbits of this sub-sample around the Galaxy. The results of these investigations do not support the scenario that there is significant tidal debris around {omega} Centauri, which confirms previous studies on the region. It is puzzling that tidal debris has been found elsewhere but not near the cluster itself.2015A&A...574A..15Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/574/A15CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/105/145 : RR Lyr stars of omega Cen (Petersen 1994)J/A+AS/125/343 : OGLE RR Lyr stars in omega Cen (Kaluzny+ 1997)J/A+A/424/1101 : Variable Stars in the field of {omega} Cen (Kaluzny+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/574/A15https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/574/A15http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/574/A15https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/574/A15https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/574/A15http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/574/A15GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/574/A15/table12 (RR Lyrae stars (No. 1-48, table1) and photometric parameters for stars No 49 and 50 (table 2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/574/A15/table12?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/574/A15/table12?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/574/A15/table12?GETtext/xml+votable180.050000true199.78750611-49.502250.0055555555555555565/10807 6/43213 43217 43220 43223 43226-43227 43248 43251-43253 43255 43395 43398-43399 43401-43404 43426https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/574/A15?format=asciiInfraredOpticaldefaultJ/A+A/574/A15/table12RR Lyrae stars (No. 1-48, table1) and photometric parameters for stars No 49 and 50 (table 2)VTypeRR Lyrae typemeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDSequential number, [FVM2015] NN in Simbadmeta.recordintn_ID[a] a: two periods reported for these stars (see text)meta.notecharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainNobsNumber of observationmeta.numberintPerPerioddtime.perioddoublePer2? Second perioddtime.perioddoublenullableAmpAmplitude of variationmagarith.rate;phot.magfloatHJD? Heliocentric Julian date at maximum lightdtime.epochdoublenullable<Vmag>? Mean V magnitudemagphot.mag;em.opt.Vfloatnullablee_<Vmag>? rms uncertainty on <Vmag>magstat.error;phot.mag;em.opt.Vfloatnullable<Imag>? Mean I magnitudemagphot.mag;em.opt.Ifloatnullablee_<Imag>? rms uncertainty on <Imag>magstat.error;phot.mag;em.opt.IfloatnullableE(B-V)? Reddeningmagphot.color.excessfloatnullableDist? Heliocentric distancekpcpos.distance;pos.heliocentricfloatnullablee_Dist? rms uncertainty on Distkpcstat.errorfloatnullabletheta? Angular distance from the center of omega Cendegpos.angDistancefloatnullableRV? Radial velocitykm/sphys.veloc;pos.heliocentricintnullablee_RV? rms uncertainty on RVkm/sstat.errorintnullableIDC01? ID number in Clement et al. (2001AJ....122.2587C), Cl* NGC 5139 SAW VNNN in Simbadmeta.idintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar