We propose a new chemical evolution model aimed at explaining the chemical properties of globular clusters (GCs) stars. Our model depends upon the existence of (i) a peculiar pre-enrichment phase in the GC's parent galaxy associated with very low-metallicity Type II supernovae (SNe II) and (ii) localized inhomogeneous enrichment from a single Type

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We describe the highly variable X-ray and UV emission of V458 Vul (Nova Vul 2007), observed by Swift between 1 and 422 days after outburst. Initially bright only in the UV, V458 Vul became a variable hard X-ray source due to optically thin thermal emission at kT = 0.64 keV with an X-ray band unabsorbed luminosity of 2.3 × 1034 erg s-1 during days

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ATLAS3D is a multi-wavelength, volume-limited survey of 263 morphologically-selected early-type galaxies within a distance of 42 Mpc and complete to MK

In this contribution we present the first results of an theoretical attempt to address the question of the evacuation time-scale but also the star-formation efficiency and the influence of feedback on the most-massive star in a star cluster. With the use of stellar evolution models, known descriptions for the evolution of an ionised sphere around a