J/MNRAS/488/5340ivo://CDS.VizieR/J/MNRAS/488/5340doi:10.26093/cds/vizier.74885340CDSBaumgardt H.He C.Sweet S.M.Drinkwater M.Sollima A.Hurley J.,Usher C.Kamann S.Dalgleish H.Dreizler S.Husser T.-O.2024-08-20T20:12:24Z2023-02-09T12:54:40ZCDS support team

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

cds-question@unistra.frradial-velocityinfrared-astronomyspectroscopyinfrared-photometryglobular-star-clustersWe compare the results of a large grid of N-body simulations with the surface brightness and velocity dispersion profiles of the globular clusters {omega} Cen and NGC 6624. Our models include clusters with varying stellar-mass black hole retention fractions and varying masses of a central intermediate-mass black hole (IMBH). We find that an ~45000M_{sun}_ IMBH, whose presence has been suggested based on the measured velocity dispersion profile of {omega} Cen, predicts the existence of about 20 fast-moving, m>0.5M_{sun}_, main-sequence stars with a (1D) velocity v>60km/s in the central 20arcsec of {omega} Cen. However, no such star is present in the HST/ACS proper motion catalogue of Bellini et al. (2017ApJ...842....6B, Cat. J/ApJ/842/6), strongly ruling out the presence of a massive IMBH in the core of {omega} Cen. Instead, we find that all available data can be fitted by a model that contains 4.6 per cent of the mass of {omega} Cen in a centrally concentrated cluster of stellar-mass black holes. We show that this mass fraction in stellar-mass BHs is compatible with the predictions of stellar evolution models of massive stars. We also compare our grid of N-body simulations with NGC 6624, a cluster recently claimed to harbour a 20000M_{sun}_ black hole based on timing observations of millisecond pulsars. However, we find that models with M_IMBH_>1000M_{sun}_ IMBHs are incompatible with the observed velocity dispersion and surface brightness profile of NGC 6624, ruling out the presence of a massive IMBH in this cluster. Models without an IMBH provide again an excellent fit to NGC 6624.2019MNRAS.488.5340Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/488/5340CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/488/5340https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/488/5340http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/488/5340https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/488/5340https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/488/5340http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/488/5340GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/488/5340/tablea1 (DEIMOS stellar radial velocities for stars in the field of NGC 6624)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/488/5340/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/488/5340/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/488/5340/tablea1?GETtext/xml+votable180.050000true275.72312611-30.390243890.0055555555555555566/28751 287621.5062136169708525e-19 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/488/5340?format=asciiInfrareddefaultJ/MNRAS/488/5340/tablea1DEIMOS stellar radial velocities for stars in the field of NGC 6624recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name from 2MASS (HHMMSSss+DDMMSSs)meta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainRVHeliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloate_RVError on RVkm/sstat.errorfloatdDistance from the cluster centerarcminpos.angDistancefloatJmag? 2MASS J-band magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? Error on Jmagmagstat.error;phot.magfloatnullableKsmag? 2MASS K-band magnitudemagphot.mag;em.IR.Kfloatnullablee_Ksmag? Error on Ksmagmagstat.error;phot.magfloatnullablePmembMembership probability based on the radial velocity (1)stat.probabilityfloato_RVNumber of radial velocity measurementsmeta.numberintPRVcstFor stars with multiple radial velocity measurements, the probability that the star has a constant radial velocitystat.probabilityfloat