APIE TFAITFAI administracijos ir TFAI tarybos skelbimai
Philippe de Meulenaer pranešimas
VU AO seminaras įvyks spalio 20 d. (trečiadienį) 15 val. Čiurlionio 29.
Pranešėjas: Philippe de Meulenaer
Tema: Star Clusters – still unresolved questions
Santrauka: The importance of the star clusters on the star formation history and evolution of a galaxy is nowadays undoubted. Indeed, it is now widely accepted that 70–90% of stars do not form in isolation, but in a clustered mode (e.g. Lada & Lada 2003). Several disruption mechanisms appear in the whole life of clusters and often allow most of formed stars to be freed and then to populate the galactic disc. However, the accurate physical processes at work during star cluster formation as well as disruption mechanisms are still poorly understood. For example, the speed of the star formation during the collapse and fragmentation of the initial giant molecular clouds leading to star clusters is under sharp debate (Tan et al. 2006, Elmegreen 2007). An important disagreement also exists between hydrodynamical models and observations about the efficiency of star formation required for the long–term stability of the clusters (e.g. Bastian & Goodwin 2006, Anders et al. 2007). In this presentation we intend to review the main known characteristics of star cluster formation and evolution and present some of the still unresolved questions (e.g. de Grijs 2010) that should be fixed in the search of accurate galactic evolution models.
Daugiau informacijos: www.astro.ff.vu.lt/seminarai
Maloniai kviečiame dalyvauti,
Donatas
Pranešėjas: Philippe de Meulenaer
Tema: Star Clusters – still unresolved questions
Santrauka: The importance of the star clusters on the star formation history and evolution of a galaxy is nowadays undoubted. Indeed, it is now widely accepted that 70–90% of stars do not form in isolation, but in a clustered mode (e.g. Lada & Lada 2003). Several disruption mechanisms appear in the whole life of clusters and often allow most of formed stars to be freed and then to populate the galactic disc. However, the accurate physical processes at work during star cluster formation as well as disruption mechanisms are still poorly understood. For example, the speed of the star formation during the collapse and fragmentation of the initial giant molecular clouds leading to star clusters is under sharp debate (Tan et al. 2006, Elmegreen 2007). An important disagreement also exists between hydrodynamical models and observations about the efficiency of star formation required for the long–term stability of the clusters (e.g. Bastian & Goodwin 2006, Anders et al. 2007). In this presentation we intend to review the main known characteristics of star cluster formation and evolution and present some of the still unresolved questions (e.g. de Grijs 2010) that should be fixed in the search of accurate galactic evolution models.
Daugiau informacijos: www.astro.ff.vu.lt/seminarai
Maloniai kviečiame dalyvauti,
Donatas
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