J/A+A/628/A60ivo://CDS.VizieR/J/A+A/628/A60doi:10.26093/cds/vizier.36280060CDSFensch J.Duc P.-A.Boquien M.Elmegreen D.M.Elmegreen B.G.,Bournaud F.Brinks E.de Grijs R.Lelli F.Renaud F.Weilbacher P.M.2019-11-22T13:49:03Z2019-08-07T08:15:24ZCDS support team

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

cds-question@unistra.frgalaxiesglobular-star-clustersccd-photometryhst-photometryThe formation of globular clusters remains an open debate. Dwarf starburst galaxies are efficient at forming young massive clusters with similar masses as globular clusters and may hold the key to understanding their formation. We study star cluster formation in a tidal debris - including the vicinity of three tidal dwarf galaxies - in a massive gas dominated collisional ring around NGC 5291. These dwarfs have physical parameters which differ significantly from local starbursting dwarfs. They are gas-rich, highly turbulent, have a gas metallicity already enriched up to half-solar, and are expected to be free of dark matter. The aim is to study massive star cluster formation in this as yet unexplored type of environment. We use imaging from the Hubble Space Telescope using broadband filters covering the wavelength range from the near- ultraviolet to the near-infrared. We determine the masses and ages of the cluster candidates by using the spectral energy distribution- fitting code CIGALE, carefully considering age-extinction degeneracy effects on the estimation of the physical parameters. Results. We find that the tidal dwarf galaxies in the ring of NGC 5291 are forming star clusters with an average efficiency of about 40%, comparable to blue compact dwarf galaxies. We also find massive star clusters for which the photometry suggests that they were formed at the very birth of the tidal dwarf galaxies and have survived for several hundred million years. Therefore our study shows that extended tidal dwarf galaxies and compact clusters may be formed simultaneously. In the specific case observed here, the young star clusters are not massive enough to survive for a Hubble time. However one may speculate that similar objects at higher redshift, with higher star formation rate, might form some of the long lived globular clusters.2019A&A...628A..60Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/628/A60CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/628/A60https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/628/A60http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/628/A60https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/628/A60https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/628/A60http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/628/A60GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/628/A60/table (Cluster positions and flux)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/628/A60/table?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/628/A60/table?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/628/A60/table?GETtext/xml+votable180.050000true206.81342389-30.470386110.0055555555555555566/438761.0590977079788917e-19 7.605786964834612e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/628/A60?format=asciidefaultJ/A+A/628/A60/tableCluster positions and fluxrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCluster[0/1289] Cluster numbermeta.idintRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainl_F336WUpper limit flag on F336Wmeta.code.errorcharF336WFlux in F336W band (1)mJyphot.mag;em.opt.Udoublee_F336W? 1-sigma uncertainty on F336W fluxmJystat.errordoublenullablel_F475WUpper limit flag on F475Wmeta.code.errorcharF475WFlux in F475W band (1)mJyphot.mag;em.opt.Bdoublee_F475W? 1-sigma uncertainty on F475W fluxmJystat.errordoublenullablel_F606WUpper limit flag on F606Wmeta.code.errorcharF606WFlux in F606W band (1)mJyphot.mag;em.opt.Rdoublee_F606W? 1-sigma uncertainty on F606W fluxmJystat.errordoublenullablel_F814WUpper limit flag on F814Wmeta.code.errorcharF814WFlux in F814W band (1)mJyphot.mag;em.opt.Idoublee_F814W? 1-sigma uncertainty on F814W fluxmJystat.errordoublenullablel_F160WUpper limit flag on F160Wmeta.code.errorcharF160WFlux in F160W band (1)mJyphot.mag;em.IR.Hdoublee_F160W? 1-sigma uncertainty on F160W fluxmJystat.errordoublenullable