J/MNRAS/489/4367ivo://CDS.VizieR/J/MNRAS/489/4367doi:10.26093/cds/vizier.74894367CDSPiatti A.E.Webb J.J.Carlberg R.G.2024-08-20T20:13:03Z2023-02-14T13:44:03ZCDS support team

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

cds-question@unistra.frglobular-star-clustersmilky-way-galaxyvisible-astronomyWe report on the extent of the effects of the Milky Way gravitational field in shaping the structural parameters and internal dynamics of its globular cluster population. We make use of a homogeneous, up-to-date data set with kinematics, structural properties, current and initial masses of 156 globular clusters. In general, cluster radii increase as the Milky Way potential weakens; with the core and Jacobi radii being those which increase at the slowest and fastest rate, respectively. We interpret this result as the innermost regions of globular clusters being less sensitive to changes in the tidal forces with the Galactocentric distance. The Milky Way gravitational field also seems to have differentially accelerated the internal dynamical evolution of individual clusters, with those toward the bulge appearing dynamically older. Finally, we find a subpopulation consisting of both compact and extended globular clusters (as defined by their r_h_/r_J_ ratio) beyond 8 kpc that appear to have lost a large fraction of their initial mass lost via disruption. Moreover, we identify a third group with r_h_/r_J_>0.4, which have lost an even larger fraction of their initial mass by disruption. In both cases the high fraction of mass lost is likely due to their large orbital eccentricities and inclination angles, which lead to them experiencing more tidal shocks at perigalacticon and during disc crossings. Comparing the structural and orbital parameters of individual clusters allows for constraints to be placed on whether or not their evolution was relaxation or tidally dominated.2019MNRAS.489.4367Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/489/4367CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/489/4367https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/489/4367http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/489/4367https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/489/4367https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/489/4367http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/489/4367GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/489/4367/tablea1 (Milky Way globular clusters' parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/489/4367/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/489/4367/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/489/4367/tablea1?GETtext/xml+votable180.050000true6.0223292-72.08144440.0055555555555555566/1133 3950 6389 9436 9666 10008 10321 10336 12405 12425 12531 12943 14489 16647 17121 17711 19091 20001 21017 24843 25486 25873 27237 27981 27986 28067 28577 28705 28717 28741 28751 28768-28769 28778 28781 28805 28808 28815 28817 28833 28835 28838 28855 28867-28868 28876-28877 28882 28889 28895 28903 28905 28959 28962 28970 28973-28974 29077 29090 29184 29187 29195 29202 29216 29222 29231 29233 29248 29267 29289 29294 29318 29377 29626 29632 29636-29637 29816 29870 30321 30323 30378 30769 30998 31019 31043 31095 31115 31128 31398 31417 31723 32083 33321 33330 33635 34242 34317 34811 36971 37294 38465 39642 39954 41011 41257 41304 41507 41522 41847 41852 42076 42152-42153 42204 42278 42314 42320 42361 42466 42700 42761 42789 42841 42862 42955 42958 42990 43125 43193 43227 43894 44086 44220 44427 47125 47620 47745 47777 47825 47866 47868 47903 47916 47935 47971 48035 48434 48444 48698 48952https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/489/4367?format=asciiOpticaldefaultJ/MNRAS/489/4367/tablea1Milky Way globular clusters' parametersSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGlobular cluster namemeta.id;meta.maincharaSemimajor axis of the globular cluster's orbitkpcphys.size.smajAxisfloate_aError on akpcstat.errorfloatRperiPerigalactic distancepcpos.distancefloate_RperiError on Rperipcstat.errorfloatrh/rJaRatio of half-mass radius to Jacobi radius calculated at cluster's semimajor distancephys.size;arith.ratiofloatrh/rJRperiRatio of half-mass radius to Jacobi radius calculated at cluster's perigalactic distancephys.size;arith.ratiofloateccOrbital eccentricity (1)src.orbital.eccentricityfloate_eccError on eccstat.errorfloatiOrbit inclinationdegsrc.orbital.inclinationfloate_iError on idegstat.errorfloat_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main