Zoekopdracht:
journal id: "astronomyxandxastrophysics"
| Auteurs | L. Yungelson, E.P.J. van den Heuvel, J.S. Vink, S.F. Portegies Zwart, A. de Koter | | Titel | On the evolution and fate of super-massive stars |
| Tijdschrift | Astronomy and Astrophysics |
| Jaargang | 477 |
| Jaar | 2008 |
| Nummer | 1 |
| Pagina's | 223-237 |
| ISSN | 00046361 |
| Faculteit | Faculteit der Natuurwetenschappen, Wiskunde en Informatica |
| Instituut/afd. | FNWI: Astronomical Institute Anton Pannekoek (IAP)
FNWI: Informatics Institute (II) |
| Samenvatting | Context. We study the evolution and fate of solar composition super-massive stars in the mass range 60-1000 M-circle dot. Our study is relevant for very massive objects observed in young stellar complexes as well as for super-massive stars that could potentially form through runaway stellar collisions.
Aims. We predict the outcomes of stellar evolution by employing a mass-loss prescription that is consistent with the observed Hertzsprung-Russell Diagram location of the most massive stars.
Methods. We compute a series of stellar models with an appropriately modified version of the Eggleton evolutionary code.
Results. We find that super-massive stars with initial masses up to 1000 M-circle dot end their lives as objects less massive than similar or equal to 150 M-circle dot. These objects are expected to collapse into black holes (with M less than or similar to 70 M-circle dot) or explode as pair-instability supernovae.
Conclusions. We argue that if ultralmninous X-ray sources (ULXs) contain intermediate-mass black holes, these are unlikely to be the result of runaway stellar collisions in the cores of young clusters. |
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