Massive star cluster formation and evolution in tidal dwarf galaxies

摘要: The formation of globular clusters remains an open debate. Dwarf starburst galaxies are efficient at forming young massive with similar masses as and may hold the key to understanding their formation. We study star cluster in a tidal debris - including vicinity three dwarf gas dominated collisional ring around NGC~5291. These dwarfs have physical parameters which differ significantly from local starbursting dwarfs. They gas-rich, highly turbulent, metallicity already enriched up half-solar, expected be free dark matter. aim is this yet unexplored type environment. use imaging Hubble Space Telescope using broadband filters covering wavelength range near-ultraviolet near-infrared. determine ages candidates by spectral energy distribution-fitting code CIGALE, carefully considering age-extinction degeneracy effects on estimation parameters. find that NGC 5291 average efficiency $\sim40\%$, comparable blue compact galaxies. also for photometry suggests they were formed very birth survived several hundred million years. Therefore our shows extended simultaneously. In specific case observed here, not enough survive time. However one speculate objects higher redshift, rate, might form some long lived clusters.